农业环境科学学报2018，Vol.37Issue(4)：741-746,6.DOI:10.11654/jaes.2017-1551
太湖稻麦轮作区减施磷肥对土壤供磷和小麦吸收磷的影响
The effect of phosphorus-reduction on soil phosphorus supply and wheat phosphorus uptake in a rice-wheat rotation system in the Taihu Lake Region
摘要
Abstract
A field experiment was performed to investigate the effect of P reduction on soil P supply and wheat P uptake in a rice-wheat rota-tion system in Taihu Lake Region by analyzing the soil Olsen P, DGT-Labile P, grain yield, and P uptake of wheat. Four fertilization regimes,including P fertilization during both the rice- and wheat-growing seasons(PR+W,current farming practice,and control);P fertil-ization only during the rice-growing season(PR);P fertilization only during the wheat-growing season(PW);and no P fertilization during either season(Pzero)were designed.Compared with the PR+W regime,the PW treatment did not decrease soil Olsen P,wheat grain yield, or crop total P.In contrast,the PR treatment significantly(P﹤0.05)reduced the soil Olsen P, grain yield of wheat, and the aboveground crop total P by 44.8%,32.8%,and 27.9%,respectively.Significant positive correlation was observed between the DGT-Labile P and soil Olsen P(P﹤0.05,R2=0.42),both of which had a significant positive correlation with the grain yield of wheat and crop total P.In the wheat season,a P regime with P fertilization not only ensures adequate soil P supply and wheat P uptake,but also maintained the grain yield of wheat.In contrast,a P regime without P fertilization significantly reduced the soil Olsen P,P uptake,and grain yield of wheat.DGT-Labile P could assess the relationship between soil P supply and wheat P uptake in rice-wheat rotation systems in the Taihu Lake Region.关键词
太湖农田/减施磷肥/籽粒产量/植株全磷/土壤速效磷/DGT提取磷Key words
Taihu Lake farmland/phosphorus fertilizer reduction/grain yield/crop total P/soil Olsen P/DGT-Labile P分类
资源环境引用本文复制引用
陈浩,汪玉,袁佳慧,朱文彬,王慎强..太湖稻麦轮作区减施磷肥对土壤供磷和小麦吸收磷的影响[J].农业环境科学学报,2018,37(4):741-746,6.基金项目
国家自然科学基金项目(41671304) （41671304）
国家重点研发计划项目(2017YFD0200206) （2017YFD0200206）
江苏省农业科技自主创新资金项目[CX(15)1004],国家"948"重点项目(2011-G30)The National Natural Science Foundation of China(41671304) （15）
The National Key Research and Development Program of China(2017YFD0200206) （2017YFD0200206）
The Jiangsu Agriculture Science and Technology Innovation Fund[CX(15)1004] （15）
The Key Program of the National“948”(2011-G30) （2011-G30）
