Change in phosphorus requirement with increasing grain yield for Chinese maize production

文献类型： 外文期刊

第一作者： Wu, Liangquan

作者： Wu, Liangquan;Cui, Zhenling;Chen, Xinping;Deng, Yan;Zhang, Wei;Chen, Keru;Wu, Liangquan;Yue, Shanchao;Sun, Yixiang;Zhao, Rongfang

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关键词： Phosphorus uptake requirements;Grain yield;Summer maize;Post-silking gain

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）

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收录情况： SCI

摘要： By understanding the relation between maize (Zea mays L.) grain yield and phosphorus (P) uptake requirements it is possible to reduce both cost and environmental impact of maize production. The goal of this study was to determine P uptake requirements and patterns of P accumulation, pre- and post-silking, at different maize grain yield levels. A database comprising measurements in 955 plots in 44 on-farm and research station experiments during the period 2000-2012 on the North China Plain was used for the analyses. The P requirement (P-req, the P content Mg-1 grain yield on the basis of 155 g kg(-1) moisture content) increased significantly from 2.84 kg in the P < Opt. treatment to 3.44 kg in the P > Opt. treatment. In the Optimal P treatment, average P-req. values were 3.41, 3.15, 3.09, and 2.94 kg for grain yields ranging from <8.0, 8-10, 10-12, and >12.0 Mg ha(-1), respectively. The decrease in P-req values with increasing grain yield was mainly attributable to the increase in the harvest index from 0.47 to 0.53 and the decrease in grain P concentrations from 2.73 to 2.42 g kg(-1). A larger proportion of the P was accumulated post-silking when grain yields were higher than 10 Mg ha(-1) (48%) and 8-10 Mg ha(-1) (44%) than when yields were less than 8 Mg ha(-1) (35%). Using this knowledge of P uptake requirements should improve assessments of global P balance, and help optimize P management, especially in high-yielding maize system. (C) 2015 Published by Elsevier B.V.

分类号： S

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