脲酶抑制剂尿素在冬小麦上的应用效果研究

为验证脲酶抑制剂尿素在小麦上的应用效果和对氮素利用率的影响,采用对比的试验方法,以常规施肥和增效尿素作对照,研究了在减量施用氮肥下小麦的产量和氮肥利用率。结果表明,小麦施用脲酶抑制剂尿素能显著增加产量和提高氮素利用率,对降低氮素化肥的投入和降低面源污染都有着现实的意义,氮素利用率最高可提高到42.8%。施用脲酶抑制剂尿素的处理较常规施肥增产效果显著,施纯氮168 kg/hm^2的处理增产效果最好,产量7 377.0 kg/hm^2,较常规施肥增加10.5%。通过示范试验,该肥料用量少,效果好,增产作用明显,具有良好的推广前景,可在粮食等作物上大面积推广应用。

Urea Hydrolysis and Urease Inhibitors Under Submerged Condition

INTRODUCTION It is an interesting research area using urease inhibitors to curb urease activity in soil,to decrease the rate of urea hydrolysis and to increase the recovery of urea nitrogen(Zhou,1984;Guan,1985).Few studies have been conducted on the relationship betweenthe effectiveness of the inhibitors applied to rice and the environmental conditions and