小麦-玉米周年轮作制下的控释肥及控释BB肥肥效试验研究

Study on the Effect of the Controlled Released Urea on Wheat-Corn

在驻马店市的新坡村与驻马店农科所农场进行了小麦—玉米轮作制下的控释尿素与普通尿素用量试验,结果表明:小麦田、玉米田均以控释尿素100%处理最好。新坡村与驻马店农科所农场的小麦产量分别为8175kg/hm2和8272kg/hm2;比同等用量的普通尿素增产873～860kg/hm2,增产12.0%～11.6%,增产效果显著;小麦氮素利用率以控释尿素100%处理最高,分别为46.1%和48.6%;氮素用量相同时,小麦田控释尿素氮素利用率高于普通尿素氮素利用率。玉米产量为8715kg/hm2和8848kg/hm2,比同等用量的普通尿素增产667～686kg/hm2,增产8.3%～8.4%,增产效果显著;控释尿素用量从70%到100%时,小麦、玉米产量随氮肥用量增加而增加,普通尿素也呈现同样趋势,随尿素用量的增加小麦、玉米产量在增加;70%控释尿素与100%普通尿素处理之间产量差异不大,说明使用控释尿素用量比普通尿素用量减少1/3的纯氮量时,小麦、玉米作物产量并不下降。

The effects of controlled release urea （CRU） on wheat and corn yields in wheat-maize rotation system are studied in Xinpo Village and Institute of agricultural science of ZHUMADIAN, respectively. The results showed that, the yields of the treatment of CRU100% were the highest. The yields of wheat were 8175 kg/hm^2 and 8272 kg/hm^2, for Xinpo Village and Institute of agricultural science of ZHUMADIAN respectively. It increased 12.0% and 11.6% compared with the 100% conventional urea test. As to the effect of the use efficiency of fertilizer-nitrogen, the composition above was also the best. Compared with the equivalent conventional urea, the use efficiency of fertilizer-nitrogen of controlled release urea was higher. The yields of corn were 8715 kg/hm^2 and 8848 kg/hm^2, for Xinpo Village and Institute of agricultural science of ZHUMADIAN respectively, which increased 8.3% and 8.4% compared with the 100% conventional urea test. The crop yield increased with the nitrogen application, as the application of control released fertilizer from 70% to 100%. And it was the same in conventional urea. As the N amount decreased by 1/3, the yields were not reduced.