江西农业大学学报2011，Vol.33Issue(6)：1031-1036,6.
施氮量对免耕抛栽稻产量及氮素吸收利用的影响
Effects of Nitrogen Application on Yield of No-tillage and Cast Transplanted Rice and Its Nitrogen Absorption
摘要
Abstract
Field experiments were conducted in double cropping rice field to study the effects of nitrogen fertilizer rates (0,120,180,240 kg/hm2)on yield and N-uptake and use efficiency of no-tillage cast transplanting rice. The results showed that the grain yield of no-tillage and cast transplanted rice increased significantly with the nitrogen application from 0 to 240 kg/hm2, with the amount of N application in excess of 180 kg/hm , the late rice grain yield decreased significantly. There was a significant positive correlation between the amounts of N application and N accumulation; there was a significantly positive correlation between the N transfer efficiency from heading to maturity stage and grain yield. The fertilizer-N recovery efficiency of no-tillage cast transplanted early rice increased with the increase of the amounts of nitrogen application, but that of no-tillage and cast transplanted late rice decreased with the amounts of nitrogen application; the fertilizer-N physiological efficiency and agronomic efficiency and N-harvest index decreased with the increase of the amounts of nitrogen application.关键词
双季稻/免耕抛秧/产量/氮素吸收利用Key words
double cropping rice/ no -tillage cast transplanting/ yield/ N-uptake and use efficiency分类
农业科技引用本文复制引用
吴建富,潘晓华,石庆华..施氮量对免耕抛栽稻产量及氮素吸收利用的影响[J].江西农业大学学报,2011,33(6):1031-1036,6.基金项目
国家"十一五"科技支撑计划项目(2006BAD02A04)和江西省教育厅项目(GJJ09172) （2006BAD02A04）
