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

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