摘要
以控释氮肥和普通氮肥为试验肥料,通过田间小区试验,研究了不同施肥方法对水稻产量和氮肥利用率的影响。结果表明:一次性全量基施普通氮肥不能满足水稻生长需要,会造成水稻减产;而基施控释氮肥能提高群体的有效穗数,改善单株的产量构成结构,且显著提高氮肥利用率,最终提高水稻产量。在施N量减少30%条件下(CRU70%处理),水稻氮肥利用率最高,且产量显著高于普通氮肥处理(PU100%处理)。本研究条件下,CRU70%+PU30%处理的实粒数和结实率最高,水稻产量最高(8 939 kg/hm2),较CRU70%处理增产显著。
Using the controlled release nitrogen fertilizer and nitrogen fertilizer as the tested material,the effects of different application methods of nitrogen fertilizers on the yield and nitrogen utilization rate of rice were studied.The results showed that the disposable basal application of 240 kg/hm2 nitrogen could not fulfill the normal growth of rice,so the yield of rice decreased.The basal application of controlled release nitrogen fertilizer could increase the effective spikes and improve the yield components per plant,increase the nitrogen utilization rate significantly,then increase the yield.When the application of controlled release nitrogen fertilizer was 168 kg/hm2,the nitrogen utilization rate was the highest,and the yield was higher than the treatment with urea.When the controlled release nitrogen fertilizer（168 kg/hm2 nitrogen） and urea（72 kg/hm2 nitrogen） were applied at the same time,the filled grains,seed setting rate and yield were the highest.
出处
《河北农业科学》
2011年第3期39-41,共3页
Journal of Hebei Agricultural Sciences
基金
国家科技支撑计划项目(2006BAD4B08)
关键词
氮肥
控释肥料
水稻
产量
氮肥利用率
Nitrogen fertilizer
Controlled release fertilizer
Rice
Yield
Nitrogen utilization rate
