新型缓释尿素对玉米和水稻产量、氮肥利用率及无机氮残留的影响

Effects of Slow-release Nitrogen Fertilizers on Yield of Maize and Rice,Nitrogen Use Efficiency and Inorganic N Residue

通过连续2年田间试验,研究了3种尿素(普通尿素、缓释尿素1和缓释尿素2)施入土壤后作物产量、氮肥利用率及土壤无机氮残留的差异。结果表明:与普通尿素相比,2种新型缓释尿素均能显著提高作物产量和氮肥利用率,缓释尿素1对玉米和水稻分别增产10.35%和8.00%,氮肥利用率分别提高14.01%和7.41%;缓释尿素2对玉米和水稻分别增产10.12%和12.55%,氮肥利用率分别提高5.87%和4.79%。水田施用缓释尿素2效果更好,而旱田施用2种缓释肥效果相等。

Three nitrogen fertilizers（conventional urea,slow release urea 1 and slow release urea 2） were tested under field experimentation during two years to investigate the differences of the yield of maize and rice,N use efficiency and inorganic N residue.Results showed that slow-release N could increase maize and rice yield,and N use efficiency significantly.Compared with conventional urea,the yield of maize and rice increased by 10.35% and 8.00% and the N use efficiency increased by 14.01% and 7.41% with experimental fertilizer 1,and the yield increased by 10.12% and 12.55% and the N use efficiency increased by 5.87% and 4.79% with experimental fertilizer 2.The fertilizer 2 had a better effect in paddy field.Both of two kinds of slow release urea showed the same effect in dry land.