江西农业学报2016，Vol.28Issue(9)：74-78,5.DOI:10.19386/jc.nki.jxnyxb.2016.09.17
太湖地区小麦生产氮和磷投入阈值的研究
Study on Threshold of Nitrogen and Phosphorus Input into Wh eat Production in Taihu Lake Area
摘要
Abstract
The influences of different nitrogen (N) and phosphorus (P) application rates on wheat yield, fertilizer apparent utilization rate, and soil N, P content were studied through field location tests in the typical rice-wheat rotation farmland in the Taihu Lake Basin during 2012~2013, and the thresholds of N and P input into wheat production were inferred by the overlay a-nalysis of yield effect diagram and N, P loss risk diagram.The results indicated that:the wheat grain yield increased first and then decreased along with the increase in N application rate, while it declined gradually when the application rate of P increased , and it could reach 4.14 t/hm2 at most;after the harvest of wheat, the N and P surplus in the soil basically revealed a rising trend as the application rate of N and P increased;the threshold of N and P ( P 2O 5 )input for the stable wheat yield and less N , P emission in the Taihu Lake area was 190.80 and 43.59 kg/hm2 , respectively.关键词
太湖地区/小麦/氮/磷施用阈值/面源污染Key words
Taihu Lake area/Wheat/Threshold of N, P input/Non-point pollution分类
农业科技引用本文复制引用
李妍,席运官,张弛,王磊,李刚,田伟,张纪兵,肖兴基..太湖地区小麦生产氮和磷投入阈值的研究[J].江西农业学报,2016,28(9):74-78,5.基金项目
公益性行业（农业）科研专项（201003014－2）。 （）
