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

摘要：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：在小麦玉米上均以控释尿素100%处理最好。小麦产量：新坡村与驻马店农科所农场的产量分别为8173和8264 kg?hm-2；比同等用量的普通尿素增产877 kg/hm2～837kg/hm2，增产12.0%～11.3%，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46.08%和48.92%；氮素用量相同时，在小麦上，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8714kg/hm2和8838 kg/hm2，比同等用量的普通尿素增产658 kg/hm2～667 kg/hm2，增产8.2%～8.2%，增产效果显著；控释尿素用量从50%，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、50%控释尿素与70%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。

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

Abstract: 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/hm2 and 8272 kg/hm2, 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/hm2 and 8848 kg/hm2, 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.