化肥减量增效田间试验

[目的]为了明确氮肥使用量对水稻产量及相关性状的影响,为化肥减量增效工程的实施提供实例参考和积累技术资料。[方法]采用田间试验,设置(氮减25%、空白、推荐施肥、不施氮肥、习惯施肥)5个处理,调查比较基本苗数、最高苗数及各产量性状。[结果]施氮量与分蘖率、有效穗数正相关,但与成穗率、产量负相关,适当减少氮肥施用量可在一定程度上提高产量。实测和理论产量均表现为减少25%施氮量处理产量最高,推荐施肥处理产量次之。两个试验户实测产量均以氮减25%处理最高,折合亩产量分别达到546.27 g和697.31 kg/667m2。[结论]不同田块采用不同的施肥量能大大提高化肥的利用率并能有效提高产量。

Field Experiment on Decrement and Synergism of Chemical Fertilizer

[Objective] The purpose was to confirm the effect of nitrogen dosage on the yield of rice and its relative characteristic to supply reference example and accumulate technical data for the implementation of decrement and synergism project of chemical fertilizer.[Method] The basic seedling number,highest seedling number and different yield trait were investigated and compared through setting up 5 treatments(N decrement of 25%,the Blank(CK),recommending dosage,without nitrogen application and conventional fertilization) in the field experiment.[Result] N dosage was positively related to tillering rate and effective spike number,but negatively related to panicle bearing tiller and yield.The proper decrement of N dosage could increase the yield to some extent.The measured and theoretical yield both performed that the yield of the treatment with decrement of N dosage by 25% was highest,that of recommending dosage was next.The measured yields of two experimental household were both highest in the treatment with decrement of N dosage by 25%,the yields per 667 m2 achieved 546.27 kg and 697.31 kg respectively.[Conclusion] Different fertilizer dosages in different fields could increase utilization rate greatly of chemical fertilizer and yield effectively.