氮肥运筹对泽泻产量、品质和氮肥利用率的影响

Effect of Nitrogen Management on The Yield,Quality and N Utilization Efficiency of Alisma plantago-aquatica Linn

试验研究了不同施氮量和施肥方式对泽泻产量、品质和氮肥利用率的影响。结果表明,在同一生育期,各施氮处理生物量显著高于对照A0(不施氮),且泽泻产量随着施氮量的增加而增加,但A3(施氮量150kg/hm2)和A4(施氮量200kg/hm2)处理间差异不明显。同时,随着施氮量的增加,氮素吸收利用率呈先增后减的趋势。不同的施肥方式对泽泻产量和品质影响不同,B2(底追肥各1/2)施肥方式较B1(底肥一次施入)施肥方式更能明显提高泽泻的产量和品质。由此可以得出,在各种处理组合中,A3B2处理(施氮量为150kg/hm2和底追肥各1/2组合)是提高泽泻产量和品质的最优组合。

An experiment was carried out to study the effects of different ways of N application and the applying amounts on the yield,quality and N utilization rate of Alisma plantago-aquatica Linn.The result showed,in the same growth stage,the biomass of all treatments was significantly higher than the controlled treatment A0（without any nitrogen applied）,and with the increase of N applying amount,the yield of Alisma plantago-aquatica Linn increased,but there were no evident difference between treatments A3 and A4.Simultaneously,with the increase of N applying amount,N uptake and utilization rate tended to increase firstly and then decrease.Different ways of fertilizing had different effects on the yield and quality of Alisma plantago-aquatica Linn,among them,the treatment B2 could make a higher yield and better quality than that of B1.For the treatment combinations,A3B2 combination was the optimal combination for increasing the yield and improving the quality of Alisma plantago-aquatica Linn.