氮肥运筹对红壤稻田移栽油菜产量及生长发育的影响

Effects of Different Nitrogen Applications on Yield and Growth of Transplanted Rapeseed in Red Soil Paddy Field

通过不同氮肥运筹的田间试验,研究氮肥对油菜生长发育、产量构建的影响。结果表明,施氮处理与对照相比,各经济性状普遍要高;增施氮肥促进了油菜整个生育期的生长和发育,控释氮肥在各生育时期的干物质积累量最大,成熟期的角果数、角粒数、千粒重在各处理中也相对较大,产量最高为1877.55 kg/hm2,比对照处理增产41.81%。

Field experiments were conducted to investigate the effects of nitrogen application on the growth and yield structure of transplanted rapeseed in red soil paddy field.The results showed that the economical characters of rapeseed in N application treatments were generally higher than those of rapeseed in the check（CK）.The growth and development of rapeseed at the whole growth stage were promoted by increasing the application of N fertilizer.In the treatment of applying controlled-release N fertilizer,the dry matter accumulation of rapeseed at every growth stage was maximum,the number of pod,number of grain per pod and 1000-grain weight were relatively bigger in the mature period,and its highest yield was 1877.55 kg/hm2,which was 41.81% higher than that in CK.