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  • Hai-tang FENG, Han-zhong WANG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 221-227. https://doi.org/10.19802/j.issn.1007-9084.2024021

    China's vegetable oil industry has historically relied heavily on imports, which poses a substantial risk not only to national oil supply security but also across various domains including politics and economics. Given the intricate dynamics of global power competition, it is strategically imperative to optimize domestic land resource utilization efficiently while fostering ongoing advancements in agricultural science and technology. These measures are essential for bolstering vegetable oil production capacity domestically as well as diversifying import sources. By doing so effectively addresses potential security risks linked to edible vegetable oil supply chain disruptions while simultaneously safeguarding political stability, ensuring economic resilience, and promoting public welfare.

  • Bo-shou LIAO
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(1): 1-6. https://doi.org/10.19802/j.issn.1007-9084.2024051

    Implementation of the novel grand-food security strategy based on the principles of all-encompassing approach to food is highly crucial for diversifying sources, increasing supply amount, improving nutritional quality, enhancing market competitiveness, protecting eco-systems, ensuring self-coordination, promoting healthy consumption, and elevating comprehensive management of various foods in China under the New Era. Since the opening police starting in 1978, historical changes have occurred in production, trade and consumption of major agricultural products including the oilseeds, and food consumption and nutrition levels in the whole country have been significantly improved. However, the unbalanced production and consumption of certain agro-products have also led to serious problems such as an increase in chronic diseases, environmental pollution and risks within food supply chains, among which, the short domestic production and over-consumption of oilseeds and edible vegetable oils have been in a dilemma for more than ten years. Based on China’s natural resources and social-economic circumstances, the general road-map including enlarging production of rapeseed and peanut, promoting production of other special minor oilseeds and intensifying healthy consumption should be well followed in order to ensure the supply of oilseed products. It is proposed to increase the domestic vegetable oil production up to 20 million tons in the next decade, which would be the basic supply bottom line for domestic consumption. Meanwhile, further efforts should be made on improving the quality, production efficiency and market competitiveness and promoting healthy consumption of oilseed products.

  • Gu-cheng LI, Qiu-chun NIU, Bo-feng LENG, Yi-fei DING, Ting TONG, Li-xia FAN
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 228-235. https://doi.org/10.19802/j.issn.1007-9084.2023248

    Currently, the self-sufficiency rate of domestic vegetable oil is still low. As an important oil crop in China, rapeseed contributes to nearly 50% of the oil production of domestic oil crops, and it plays a vital role in ensuring national edible oil supply security. Since the "No. 1 central document" for 2012 first proposed the comprehensive deployment of agricultural science and technology strategy, the rapeseed industry has made great progress with scientific and technological support. The "No. 1 central document" for 2023 clearly proposes to further promote the soybean and oilseed production capacity improvement project, take coordinated steps to support the rapeseed industry, promote rice-oil rotation, and vigorously develop winter idle fields. This paper systematically figured the development status of rapeseed industry from 2012 to 2022, summarized the scientific and technological progress within this sector, and analysed the current challenges and prospects. Finally, policy suggestions were put forward to support the sustainable development of rapeseed industry in China.

  • Juan ZHENG, Huang HUANG, Yi-tao LIAO, Lei WANG, Jia-cheng YUAN, Jian-xin LIN, Qing-xi LIAO
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 245-259. https://doi.org/10.19802/j.issn.1007-9084.2022299

    Rapeseed is an essential oil crop in China. Hubei, Hunan and Jiangxi provinces in the middle reaches of the Yangtze River are the main planting areas, which account for more than 42% of the total planted area of rapeseed in China. The area has more than 3467 ha of winter fallow field, with massive potential for utilization. The total mechanization rate of rapeseed tillage, seeding and harvesting in the 3 provinces is higher than national average. Still, the uneven development, insufficient utilization of idle fields in winter, low levels of mechanization and intelligence, are technical bottlenecks for improving whole mechanization. This paper analyzes the basic situation and existing problems of the rapeseed industry in the middle reaches of the Yangtze River, combing tillage, seeding, harvesting key aspects of mechanization and intelligent technology, and gives the technical routes of the whole process of rapeseed production that could be promoted. Meanwhile, a comparative analysis of the technical characteristics and difficulties in promoting the application of the "tillage, seeding and harvesting" aspects of rapeseed production was carried out. Development trend of rapeseed production technology mode is semi-mechanized, mechanized to intelligent in the winter fallow fields. The technical development paths of each link are discribed as "anti-blocking, anti-sticky, anti-tangle, and high-speed, efficient, low consumption" mechanized tillage. Integrated tillage and seeding technology to complete multiple working procedures simultaneously. High efficiency, low consumption and low loss of rapeseed mechanized harvesting technology should be combined with harvesting and two-stage harvesting synergistic development. The mechanization technology of feeding, vegetable and fertilizer and the critical technology of intelligent rapeseed production should also be developed and applied simultaneously. To achieve high yield, several suggestions for promoting full mechanization technology model for rapeseed in the mid-winter fields of the Yangtze River are proposed.

  • Man-yu YUAN, Yi-jun WU, Wen-ting ZHOU, Yan-xia CONG, Yu-tang QI, Wei-nong ZHANG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 430-436. https://doi.org/10.19802/j.issn.1007-9084.2022293

    The changes of acid value, peroxide value, phosphorus content, phytosterols, tocopherols and diglycerides of rapeseed oil, as well as the composition and content of phospholipids in degummed oil feet (oil sediment) were investigated under different degumming conditions using rapeseed crude oil as raw material. There were significant differences in degumming capabilities among water degumming and enzymatic degumming, enzymatic degumming showed more competence than water degumming, meanwhile, phospholipase A1 enzymatic degumming was more thorough compared with that of phospholipase C. The peroxide value and acid value of rapeseed oil showed a decreasing trend after degumming, additionally, the acid value of phospholipase A1 decreased the least. The content of tocopherols and phytosterols in degummed oil decreased slightly, with a maximum decrease of about 5%. Diacylglycerols content in phospholipase C enzymatic degumming increased significantly, meanwhile, the ratio of 1,3-diacylglycerols to 1,2-diacylglycerols in degummed oil decreased, with the ratio ranging from (2.2-3.0):1. There were significant differences in the composition and content of phospholipids in degummed oil feet after different degumming processes, which phospholipase A1 enzymatic degumming oil feet owned the highest content of lysophospholipids, and phospholipase C enzymatic degumming oil feet had the highest content of phosphatidylinositol.

  • Wan-wan FAN, Shao-jian LI, Su-ling SANG, Hai-yan ZHANG, Meng GAO, Zhen-yu WANG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 377-384. https://doi.org/10.19802/j.issn.1007-9084.2022289

    To identify the pathogens responsible for peanut pod rot in Henan Province, 92 samples of peanut pod rot were collected from various geographic regions and subjected to tissue isolation techniques. Pathogens were identified based on their morphological and molecular biological, and verified using Koch's rules. The results revealed that Fusarium, Aspergillus niger, Aspergillus flavus, Lasiodiplodia theobromae, Sclerotium rolfsii and Neocosmospora vasinfecta were the pathogenic fungi causing peanut pod rot in Henan Province, with Fusarium as the dominant genus. The main Fusarium species identified in this study were F. oxysporum, F. solani, F. proliferatum and F. chlamydosporum, with F. oxysporum and F. solani being the predominant species. This study further confirms that peanut pod rot is caused by multiple pathogens, providing a foundation for controlling this disease in Henan Province.

  • Ka ZHANG, Hao-jie LI, Jin-fang ZHANG, Cheng CUI, Liang CHAI, Ben-chuan ZHENG, Jun JIANG, Cheng DAI, Jin-xing TU, Liang-cai JIANG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2023, 45(6): 1095-1102. https://doi.org/10.19802/j.issn.1007-9084.2023212

    Brassica napus (oilseed rape) is the primary source of vegetable edible oil in China, playing an important role in ensuring and stabitity the safety of national edible oil supply. The growth and development of oilseed rape are frequently attacked by various pathogens, among which Sclerotinia sclerotiorum is generally considered one of the most economically damaging, widely studied and highly concerned diseases. This article refers to relevant research results, elaborates on the pathological cycle and pathogenic mechanism of S. sclerotiorum, summarizes the progress of resistant germplasms, defense-ralated genes and mechanisms in oilseed rape. Additionary, this review introduces the newly reporeted pathogenicity factors such as SsCP1; it contains breakthroughs in the creation of resistant germplasm inherited from Brassica species; multiple studies that found the co-localization of genetic loci controlling flowering time and resistance to S. sclerotiorum in oilseed rape; and the research reveals the molecular mechanism mediated by the WRKY28-WRKY33 module finely regulates defense strength of oilseed rape after being infected with S. sclerotiorum. This review also looks forward to future research on oilseed rape resistance against S. Sclerotiorum, with a focus on exploring resistant germplasm. It aims to provide a reference for the comprehensive control of S. sclerotiorum in China.

  • Jia-lei ZHANG, Jian-guo WANG, Yuan-gao LI, Dian-qing YANG, Shu-bo WAN
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(3): 443-449. https://doi.org/10.19802/j.issn.1007-9084.2024069

    In order to further exploit the high-yield potential of peanuts and promote large-scale unit yield through demonstration, the Team of Peanut Cultivation and Physiological and Ecological Innovation Team from Shandong Academy of Agricultural Sciences has been consistently organizing high-yield research since 2013. Yields successively broken through the actual unit yield of 11 250 kg/hm2, 11 700 kg/hm2, and 12 000 kg/hm2, with the highest yield reaching 12 982 kg/hm2 in 2023. This paper conducts an analysis of the factors contributing to the high-yield records, including cultivation techniques, climate conditions, and yield components, and compares the input and output. In terms of cultivation technology, the high-yield cultivation technology system integrates single seeds precision sowing, whole process-controlled fertilization, coupling with bio-fungicides, and three-preventions and three-promotions regulatory approach. By fully utilizing the production potential of individual plants and cultivating high-quality populations to achieve high yields, which provides technical support for the next breakthrough in achieving a unit yield of 13 500 kg/hm2.

  • Na-na XIE, Wei HUANG, Guo-ying GAO, Da-wei ZHANG, Ding-gang ZHOU, Jin-feng WU, Jian-hua XIANG, Li-li LIU, Ming-li YAN
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 274-283. https://doi.org/10.19802/j.issn.1007-9084.2022302

    PAP2Production of anthocyanin segment 2) encodes MYB transcription factor, and regulates anthocyanin synthesis by forming MYB-bHLH-WD40 complex with bHLH and WD40. In this study we cloned PAP2 gene in Brassica, and preliminarily verified the function of PAP2, providing a reference for further understanding the regulatory mechanism of anthocyanin synthesis in Brassica. Two and one copies of PAP2 gene were cloned from Brassica carinata and Brassica nigra, respectively, and named as BcaB.PAP2, BcaC.PAP2, BniB.PAP2. These three genes are composed of 3 exons and 2 introns, encoding 247 amino acids. Based on the PAP2 gene sequences cloned in this study and other reported PAP2 gene sequences of Brassica, three pairs of primers were designed to detect the PAP2 gene of A, B and C genomes respectively, and the genomic origin of PAP2 of six species in the U’s Triangle of Brassica could be distinguished by allele specific PCR. The BjuB.PAP2 gene from the B genome of Brassica juncea was selected to construct an overexpression vector and transformed into Arabidopsis thaliana. The transgenic Arabidopsis leaves turned purple, indicating that PAP2 gene is regulating anthocyanin synthesis. After shading treatment for 10 days, the purple color of Brassica carinata lightened, and the anthocyanin content decreased by 41.22%. Quantitative PCR and transcriptomic studies showed that the expression of BcaB.PAP2 and BcaC.PAP2 in the leaves of shading plants decreased. The expression of structural genes for anthocyanin synthesis, such as chalcone synthase geneCHS), chalcone isomerase geneCHI), flavanone 3-hydroxylase geneF3H), dihydroflavonol reductase geneDFR), anthocyanin synthase geneANS), flavonoid 3-glucosyltransferase geneUFGT) and other genes were also decreased. This study completed the cloning of PAP2 gene of Brassica carinata and Brassica nigra, and carried out their evolutionary analysis. Allele specific PCR primers were designed according to the sequences of PAP2 gene cloned in this experiment and other reported genes to provide molecular markers for the genomic transmission identification of PAP2 gene in Brassica interspecific hybrids. Through the transformation of BjuB.PAP2 gene into Arabidopsis plants, it was found that PAP2 gene was involved in the accumulation of anthocyanins. It was found that the expression of BcaPAP2 gene and anthocyanin synthesis structure gene were induced by light after shading. This study cloned the PAP2 gene in Brassica and preliminarily verified its function, providing a reference for further understanding the regulatory mechanism of anthocyanin synthesis in Brassica plants.

  • Zi-cong HU, Chao-fan HU, Yan-po LI, Qiao-jun JIANG, Qun-he LI, Cui-lan FANG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(1): 208-220. https://doi.org/10.19802/j.issn.1007-9084.2022234

    Pomegranate seed oil is a functional vegetable oil extracted from pomegranate seed, the byproduct of pomegranate processing. It has promising antioxidant, anti-inflammatory, anti-tumoral, and prevention of cardiovascular diseases activities. In this article, the research results of pomegranate seed oil at home and abroad in recent years were comprehensively reviewed from the aspects of the extraction method, nutritional composition, and health benefit of pomegranate seed oil. Aqueous enzymatic method, solvent extraction method, supercritical fluid extraction method and physics-assisted extraction method had significant influences on the yield and fatty acid composition. Although there were differences in the fatty acid composition of pomegranate seed oil from different origins and different extraction methods, overall, the proportion of unsaturated fatty acids in pomegranate seed oil reached 88.57%-95.33%. The unsaturated fatty acids were dominated by punicic acids (60.62%-81.40%). They were the main bioactive ingredients of pomegranate seed oil which could exert various nutritional effects. Therefore, pomegranate seed oil is a woody vegetable oil with high nutritional value and potential utilization value. This paper aims to provide a theoretical reference for further research on pomegranate seed oil and its development, and its utilization in food, biomedicine and other fields.

  • Wen-pei YAN, Xia SUN, Ying-ying DENG, Qiang LI, Xiu-ju WU
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(1): 28-35. https://doi.org/10.19802/j.issn.1007-9084.2022271

    Soybean seed germination determines the seedling establishment and developmental process. Rapid germination and high germination rate are essential for achieving high yield in soybean production. Based on observing seed coat micromorphology and detecting the main physiological indexes at the early stage of germination, it was aimed to screen differentially expressed genes by transcriptome analysis with Heinong 35 and its mutant line M at the exposure stage (24 h after imbibition) so as to further clarify the mechanism of soybean seed germination. Results showed that there were significant differences in water absorption and germination rate. M had longer hilum and thinner seed coat than Heinong 35 by scanning electron microscopy, which might be the main reason that M absorbed water fast in the early germination stage. During germination, the abscisic acid (ABA) content gradually decreased, while the soluble protein content first decreased and then increased, and the soluble sugar content presented the trend of increase-decrease-increase with "S" shape. By transcriptome analysis, 1122 differentially expressed genes were screened, of which 478 were up-regulated and 644 were down-regulated. The differentially expressed genes were mainly enriched in the photosynthetic pathway. 22 candidate genes related to the photosynthetic pathway were screened and down-regulated in M. It was deduced that these down-regulated genes in M might cause slower photomorphogenesis and then lead to lower germination rates. These results should be helpful for elucidating the regulatory mechanism of soybean seed germination.

  • Xiao-yan YUAN, Jue LIU, Shi-qiang SHU, Xing-xiang SHU, He-hu LIU, Xing-lin PU, Yu-song ZHANG, Li-fan ZHANG, Liu HE, An-song LIN, Kai-qin ZHAO, Xiao-ying HE, Ming-lian FU
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2023, 45(5): 873-878. https://doi.org/10.19802/j.issn.1007-9084.2023254

    Colored peanut is a multi colored seed coat characteristics of edible peanut, integrating ornamental, fresh, nutritional, and health benefits. Yunnan Province is one of the representative production areas for edible peanuts in China. In recent years, on the basis of traditional cultivated red skinned small grain peanuts, excellent germplasm of edible peanuts have been developed. These new varieties exhibit colorful seed coats in purple and black, and possess desirable traits as high sugar content, low oil content (e.g. Yunhua 23). These excellent edible raw materials had advantages in quality and sales price, with a typical annual output value of about 75 000 CNY/hm2 and a maximum output value of over 150 000 CNY/hm2. These advantages significantly increased regional peanut output value, which became a driving force for rural revitalization in the production area.

  • Yan-li HU, Hui-zhong WANG, Yan JIAO, Dong-mei LI, Zi-cheng ZHANG, Yan JIANG, Xiao-hong TONG, Lei WANG, Shao-dong WANG, Sui WANG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 284-293. https://doi.org/10.19802/j.issn.1007-9084.2022301

    As a novel environmental pollutant, the impacts of nanoplastics on crops have attracted more and more attention. To explore the response of soybean to polystyrene nanoplastics (PS-NPs) at physiological and gene expression levels, this experiment used hydroponics to determine the phenotype and physiological indexes of soybean seedlings after exposure to 50 mg/L 100 nm PS-NPs for 10 days, and carried out transcriptome sequencing analysis of soybean seedling root system. The results showed that the growth of the soybean seedlings was inhibited, the root morphology changed significantly, the activities of superoxide dismutase (SOD) and catalase (CAT) increased to a certain extent, the content of malondialdehyde (MDA) increased significantly, and the content of soluble sugar decreased after PS-NPs exposure. Transcriptome analysis showed that a total of 2112 differentially expressed genes were generated by PS-NPs exposure treatment, GO and KEGG analysis showed that they were mainly enriched in pathways related to redox reaction, reaction to ethylene and abscisic acid, amino acid metabolism and synthesis of other secondary metabolites. It was noted that 250 transcription factors were differentially expressed, mainly including the ERF, WRKY, NAC, bHLH and MYB transcription factor families. This experiment lays a foundation for further exploring the impact of nanoplastics on crops such as soybeans and its molecular mechanism.

  • Yi YANG, Shi-ying YE, Jian-guo MAN
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(4): 703-711. https://doi.org/10.19802/j.issn.1007-9084.2023295

    "Seven Major Crops Breeding" project is the sole special project in the field of biological seed industry during the “13th Five-Year Plan”. It is of great significance for consolidating and leading the development direction of breeding technology and safety ensuring of China's crop seed industry. Rapeseed is one of the important objects in the project. Based on the layout and implementation of rapeseed genetic breeding, this paper summarized the main research progress, major achievements, organization and implementation management experience of rapeseed genetic breeding during the period from 5 aspects, including elite germplasm exploring, genes cloning and mechanism analysis of important agronomic traits, innovation on breeding technologies for new materials and varieties, and seed multiplication and processing technology. In addition, 3 countermeasures and suggestions are put forward for future research in this field: 1st, strengthen top-level design and systematic layout of major projects; 2nd, optimize the management system and improve the regulatory framework for biotechnology breeding; 3rd, innovate the breeding industry chain and build a seed industry innovation system with close division of labor and cooperation between science and enterprise.

  • Fu-xing LIU, Cai-li WANG, Jing TANG, Zhong-chao FENG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 236-244. https://doi.org/10.19802/j.issn.1007-9084.2022279

    Clarifying the development of rape’s total factor productivity in China since the Reform and Opening-up is a logical starting point to improve the comprehensive production capacity of rape. Based on the input-output related data of 11 rape main producing provinces during 1979-2020, this paper analyzes the dynamic evolution and convergence based on the total factor productivity measured by using Global Malmquist index, using kernel density estimation, δ convergence and β convergence, respectively. The results show that, according to the time-series characteristics, China's total factor productivity of rape has achieved certain growth in the midst of dramatic fluctuations since the Reform and Opening-up, demonstrating a technology-induced growth pattern, whereas technical efficiency does not contribute significantly to it. From the dynamic evolution, the geographical variations in the rise of rape's total factor productivity keep getting smaller. From the perspective of convergence, the overall δ value of total factor productivity of rape is fluctuating and decreasing, and has essentially stabilized around 0.01 since 2012, displaying an clear convergence tendency, confirming the existence of δ convergence. The absolute β convergence and conditional β convergence of rape’s total factor productivity exist. The convergence model’s convergence is still significant after accounting for the spatial effect, and there is a favorable spatial spillover effect. It suggests countermeasures to support the development of a national rapeseed industrial technology system, execute a regionalized development plan, and encourage coordinated regional development in order to further increase the total factor productivity of rapeseed.

  • Shou QIU, Deng-feng HONG, Guang-sheng YANG
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 267-273. https://doi.org/10.19802/j.issn.1007-9084.2022148

    Rapeseed is one of the crops that require the highest amount of boron, and additional application of boron fertilizer is necessary for production to prevent significant reduction in yield. To enhance the utilization efficiency of boron in rapeseed, we employed 2016-XFSB as a donor parent, which carries the superior allele Bna.A03NIP5;1, and used 621R as the recurrent parent. Through MAS-aided backcrossing, we successfully introduced the superior allele Bna.A03NIP5;1 into 621R and developed a near-isogenic line named 621R NIP5;1A3 . Subsequently, new hybrids were generated by crossing both 621R and 621R NIP5;1A3 with a nuclear male sterility line RG430A. Hydroponic experiments and various soil cultivation experiments were conducted to evaluate agronomic traits performance of both 621R and 621R NIP5;1A3 lines as well as their hybrids. The results demonstrated a significant improvement in boron utilization efficiency for both 621R NIP5;1A3 line and its hybrid counterparts. Moreover, these improved materials exhibited notable advantages in biomass accumulation, plant height development, silique length extension, number of grains per silique incrementation, and seed weight enhancement. The findings from this study provide valuable insights for breeding boron-efficient varieties in Brassica napus.

  • Sen-yong CHEN, Yang TANG, Bing-bing ZHANG, Hai-jiang LIU, Fei XIONG, Kai-xuan XU, Wu WEI, Qing YOU, Ming-xing LU, Lei SHI
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 312-323. https://doi.org/10.19802/j.issn.1007-9084.2022276

    Field experiments were conducted to investigate the effects of different application rates of potassium chloride (KCl) on biomass, seed yield, and nutrient accumulation and distribution in oilseed rape at both the seedling and maturity stages. The study was carried out in Jiangxia District, Wuhan City, Hubei Province, located in the middle reaches of the Yangtze River from 2021 to 2022. This research aims to provide a theoretical foundation for the optimal application of potassium (K) fertilizer in oilseed rape cultivation. Six treatments were applied, including K0 (K2O 0 kg/hm2), K30 (K2O 30 kg/hm2), K60 (K2O 60 kg/hm2), K90 (K2O 90 kg/hm2), K120 (K2O 120 kg/hm2) and K150 (K2O 150 kg/hm2). The results indicated that the biomass of all oilseed rape organs at both seedling and maturity stages, as well as seed yield, significantly increased within a certain range of increasing levels of K fertilizer. The maximum increase in seed yield was observed to be up to 1199.6 kg/hm² with an increase ratio of up to 57.20%. When the application rate of K exceeded 120 kg/hm2, there was no significant increase in shoot biomass and seed yield. With increasing K fertilizer application, there was a significant increase in K content across all organs. However, N content did not show significant changes at both the seedling and maturity stages. Notably, P content in seeds at the maturity stage exhibited a significant increase. The partial factor productivity of K fertilizer significantly decreased with increasing K fertilizer application. However, the agronomic efficiency, physiological efficiency, apparent recovery efficiency and harvest index of K fertilizer all reached their maximum at an application rate of 90 kg/hm2. Subsequently, these efficiencies gradually decreased with further increases in K fertilizer. Economic analysis revealed that the output-input ratio and net income were optimized at a K application rate of 120 kg/hm2. Further increases in K fertilizer would lead to reduced economic efficiency. In addition, the optimal application rate of K fertilizer for maximizing economic efficiency in this region is determined to be 114.6 kg/ hm2 based on a combination of linear and platform fitting results. Consequently, rational utilization of K fertilizer can significantly enhance shoot biomass and promote the accumulation of essential nutrients (N, P, and K), thereby resulting in increased plant height, primary branch count, pod number, and ultimately achieving higher yields while ensuring maximum economic efficiency.

  • Xiao-yan LIANG, Rao FU, Jia-jia LI, Kui-hua YI, Chao-hui TANG, Feng GUO, Jian-guo WANG, Jia-lei ZHANG, Shuo-bo WAN
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(3): 450-459. https://doi.org/10.19802/j.issn.1007-9084.2024047

    To improve peanut yield, density effect of single-seed sowing was explored on flowering dynamics and fruiting characteristics. A common large peanut variety Huayu 25 was used as material, 4 treatments of single-seed sowing of 278 000 plants·hm-2 (S9, plant spacing 9 cm), 208 000 plants·hm-2 (S12, plant spacing 12 cm), 167 000 plants·hm-2 (S15, plant spacing 15 cm) and double-seed sowing of 278 000 plants·hm-2 (D18, plant spacing 18 cm) were set under the same row spacing. Differences were investigated on flowering habits, needle formation, pod development dynamics, pod setting range and yield of peanut. Results showed that different densities of single-seed sowing could all promote peanut early flowering, with more flowerings. They increased the number of effective needles and promoted pod development to different degrees. The effect was most obvious under low density conditions. From the perspective of population indicators, under single-seed precision sowing mode of 208 000 plants·hm-2, peanuts have the highest number of flowerings, effective needles, and pods, the largest pod volume, pod fullness, and the highest yield level. Different densities of single-seed sowing changed pod setting range and pod spatial distribution of peanuts. The pod setting range increased with the decrease of density. However, most of the pods (more than 95%) in each treatment were still distributed within the spatial range of 6.0 cm radius. Under single-seed sowing of 208 000 plants·hm-2 (plant spacing 12.0 cm), the pod setting range was close to half of plant spacing which was more conducive to uniform distribution of pod among populations.

  • Li-mei FAN, Qian-ling HOU
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(2): 260-266. https://doi.org/10.19802/j.issn.1007-9084.2022227

    Guizhou Province is one of the main producing areas of Camellia oleifera in China. In recent years, the area of newly planted C. oleifera forest has been expanding, which led to a larger yield potential in Guizhou Province. This paper combeded the main problems of camellia processing industry development in Guizhou Province, including a lack of scale production, basic research and deep processing technology, as sell as a lack of powerful brands and quality management system. It foucused on discussion of processing industry, and pointed out keys to healthy develop Guizhou camellia processing industry. In addition, it also put forward suggestions and countermeasures for development of camellia processing industry in Guizhou from 6 aspects: promoting the transformation and upgrading of camellia processing, extending the industrial chain of camellia processing, encouraging the diversified development of industry, cultivating large and medium-sized camellia processing enterprises, implementing brand development strategy, building scientific research platform, accelerating technological innovation and upgrading, and improving product quality standard system, in order to promote healthy and rapid development of camellia processing industry in Guizhou Province.

  • Jing-ping NIU, Cai-ni YANG, Jin-zhong ZHAO, Yu-tao CHEN, Ying-xin WANG, Li LI, Min WANG, Ai-qin YUE, Wei-jun DU
    CHINESE JOURNAL OF OIL CROP SCIENCES. 2024, 46(1): 166-174. https://doi.org/10.19802/j.issn.1007-9084.2022244

    Soybean mosaic virus (SMV) disease is one of the main diseases affecting production and quality of soybean. Analyzing the genetic basis of soybean disease resistance can lay a foundation for controlling this disease by using soybean resistant varieties. In this study, 193 germplasm resources were performed phenotypic identification by inoculating soybean mosaic virus strains SC7 and SC15, these phenotypic data and 656 977 SNP markers of germplasms were used to perform genome-wide association mapping. One significant SNP-trait association with SC7 resistance was detected on chromosome 15. Ten significant SNP-trait association with SC15 resistance were detected and located on chromosomes 2, 3, 4, 5, 9, 12, 14, 17 and 19, respectively. These resistance SNP loci maybe new loci. In addition, all genes were found in the upstream and downstream 50 kb of each resistance locus by referring to the Williams82. a2 genome, some genes with SNP difference were selected as the candidate genes for resistance and analyzed by qRT-PCR. The results showed that genes Glyma.02g163300, Glyma.19g027200, and Glyma.19g057700 might be involved in resistance to SC15 in soybean. The results of this study was expected to provide important genetic resources for soybean germplasm cultivation.