Improving nitrogen management for zero-tillage rice in China

作     者：Min Huang Xuefeng Zhou Yingbin Zou 

作者机构：Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO) Hunan Agricultural University 

出 版 物：《The Crop Journal》 (作物学报（英文版）)

年 卷 期：2018年第6卷第4期

页      面：406-412页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 

基　　金：supported by the National Natural Science Foundation of China(31301267) the China Agriculture Research System(CARS-01) 

主　　题：中国 水稻 植物学 氮肥 

摘      要：Zero-tillage has become increasingly attractive in rice production in China.This study was conducted to determine the feasibility of two possible improved N management practices with fewer N applications in zero-tillage rice:(1)two split applications of urea at75 kg N ha^(-1)at mid-tillering and 45 kg N ha^(-1)at panicle initiation(U_(120–2)),and(2)a single application of cross-linked polyacrylamide-coated urea(a slow-release fertilizer)at midtillering at a rate of 150 kg N ha^(-1)(PCU_(150–1)).Three field experiments were conducted to compare grain yield and N-use efficiency among several N treatments:a zero-N control(CK),U_(120–2),PCU_(150–1),a single application of urea at mid-tillering at a rate of 150 kg N ha^(-1)(U_(150–1)),and a commonly recommended N management practice for conventional tillage rice(three split applications of urea with 75 kg N ha^(-1)as basal,30 kg N ha^(-1)at mid-tillering,and 45 kg N ha^(-1)at panicle initiation)(U_(150–3)).Treatments with N application(U_(120–2),PCU_(150–1),U_(150–1),and U_(150–3))produced 1.08–3.16 t ha^(-1)higher grain yields than CK.Grain yields under both U_(120–2)and PCU_(150–1)were comparable to that in U_(150–3).Recovery efficiency of N(RE_N),agronomic N-use efficiency(AE_N)and partial factor productivity of applied N(PFP_N)were increased under U_(120–2)and were similar under PCU_(150–1)to those under U_(150–3).U_(150–1)showed lower grain yield,RE_N,AE_N,and PFP_Nthan U_(150–3).These results suggest that U_(150–3)can be replaced with U_(120–2)to achieve both an increase in N-use efficiency and a reduction in number of N applications and or by PCU_(150–1)to achieve a maximum reduction in number of N applications in zero-tillage rice production in China.