Effect of phosphorus (P) on root morphology characteristics of peanut

ZHENG Ya-ping, WANG Chun-xiao,ZHENG Zu-lin,WANG Peng*,FENG Hao,ZHENG Yong-mei, YU Tian-yi,WANG Cai-bin

CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2019, Vol. 41 ›› Issue (4) : 622.

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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2019, Vol. 41 ›› Issue (4) : 622. DOI: 10.7505/j.issn.1007-9084.2019.04.017

Effect of phosphorus (P) on root morphology characteristics of peanut

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Abstract

For high yield peanut, phosphorus (P) fertilizer effects on root morphology characteristics were inves? tigated on 2 peanut varieties in 2015 and 2016. Field experiments with no-bottom barrels were carried out with 5 P2O5 levels: 0, 45, 90, 135 and 180 kg/hm2. The results showed that P application had significant effects on root total length. Among 0 to 135 kg/hm2, root total length increased with the increased P level. Root total length did not in? crease or slight increasedat 180 kg/hm2. Root surface area increased 20% than that of control (CK). Root total vol? umes also increased. Considering the diameter of root, P applicationsignificantly improved the length, surface area and volume of thin roots, but had less or negative increment in medium and thick roots. Considering the yield relat? ed traits, main stem height, lateral branch length, branch numbers, single plant pods and weight per 100 pods of the 2 varieties increased 1.3% to 20.6%. The promoting effect of phosphorus on agronomic traits was much lower than that on roots. Between application of 0 to 90 kg/hm2, yield increased significantly with P-level, but increased few or decreased when application greater than 90 kg/hm2. The yield of small-seed variety was more sensitive to phosphate than that of large-seed variety. Peanut yield showed significant or highly significantmost cases. The different varieties showed different correlations between yield and root surface area / root volume. In summary, studies in root diameters and their morphology characteristics could be more beneficial to high-yield peanut cultivation.

Key words

phosphorus fertilizer / peanut / variety type / root characteristics / yield

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ZHENG Ya-ping, WANG Chun-xiao,ZHENG Zu-lin,WANG Peng*,FENG Hao,ZHENG Yong-mei, YU Tian-yi,WANG Cai-bin . Effect of phosphorus (P) on root morphology characteristics of peanut[J]. CHINESE JOURNAL OF OIL CROP SCIENCES, 2019, 41(4): 622 https://doi.org/10.7505/j.issn.1007-9084.2019.04.017

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