CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2023, Vol. 45 ›› Issue (1): 72-82.doi: 10.19802/j.issn.1007-9084.2021317

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Grey correlation analysis of nutrient accumulation characteristics and yield traits of winter rapeseed in North China

Ming-chuan ZHU1(), Jun-yan WU1, Li MA1, Shi-qian GUO2, Xiao-ru CUI3, Xiu-cun ZENG4, Li-jun LIU1, Yuan-yuan PU1, Xue-cai LI1(), Wan-cang SUN1()   

  1. 1.Agronomy of Gansu Agricultural University / Gansu Provincial Key Laboratory of Aridland Crop Science / Gansu Key Lab of Crop Genetic and Germplasm Enhancement / Gansu Research Center of Rapeseed Engineering and Technology, Lanzhou 730070, China
    2.Cultivated Land Quality and Construction Protection Station of Gansu, Lanzhou 730020, China
    3.Gansu Agricultural Technology Extension Station, Lanzhou 730020, China
    4.Hexi University, Zhangye 734000, China
  • Received:2021-12-17 Online:2023-02-25 Published:2023-03-03
  • Contact: Xue-cai LI,Wan-cang SUN E-mail:2676754803@qq.com;348930135@qq.com;18293121851@163.com;348930135@qq.com


To improve nutrient utilization of winter rape in cold and arid areas of North China, agronomic traits (dry matter, nutrient accumulation and yield traits) of different winter rape varieties were investigated by using 12 cultivars of Brassica rapa L. and B. napus. Results showed that the yield traits of B. napus were significantly better than those of B. rapa. Plant height, branch height, siliques on main inflorescence, siliques per plant, seeds per silique, 1000-grain weight, plant yield and plot yield of B. napus were 12.41%, 108.11%, 56.21%, 66.91%, 5.71%, 70.79%, 103.55% and 103.87% higher than those of B. rapa, respectively. The average dry matter yield per plant of B. napus was 67.693 g, which was 191.613% of B. rapa. The nitrogen and phosphorus content per plant of B. rapa were 2.481% and 29.423% higher than B. napus. But the potassium content per plant of B. rapa was 34.826% lower. Because the higher dry matter yield of B. napus in the same ecological area, the accumulation of nitrogen, phosphorus and potassium in B. napus was significantly higher than that of B. rapa (N 84.647%, P 50.000%, and K 158.616%). The trend of total nutrient accumulation in winter type rapeseed was K > N > P, and N and P were mainly accumulated in grains; K was mainly accumulated in stems and silique shell. For every 100 kg grain, B. napus needs 6.554 kg N, 0.463 kg P and 14.612 kg K; whilst B. rapa needs 7.143 kg N, 0.572 kg P and 10.467 kg K. The utilization efficiency of N and P in B. napus was higher than in B. rapa, and demand for K was larger.

Key words: winter rapeseed, Brassica rapa L., Brassica napus L., dry matter accumulation, nutrient accumulation, yield traits

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