控释尿素与普通尿素掺混对小麦和玉米轮作产量及氮肥利用率的影响研究

Study of Effect of Blending Controlled-Release Urea with Ordinary Urea on Yield and Nitrogenous Fertilizer Utilization Efficiency of Wheat/Corn Rotation

对小麦/玉米轮作制下进行了控释尿素与普通尿素掺混比例试验。试验结果表明:控释尿素与普通尿素掺混处理的产量是在小麦、玉米上均以控释尿素70%+普通尿素30%处理最好;小麦产量分别为8 000和8 150 kg/hm^2,比100%控释尿素处理增产6.2%和7.2%,比100%普通尿素处理增产17.0%和16.7%,比对照增产39.9%和34.5%,它们之间的差异达1%显著水平;玉米产量分别为6 780和6 550 kg/hm^2,比100%控释尿素处理增产5.1%和5.6%,比100%普通尿素处理增产16.2%和17.8%,比对照增产22.1%和20.8%,它们之间的差异达1%显著水平。

Experiments are carried out with wheat/corn rotation on the blending ratio of controlled-release urea and ordinary urea. The results indicate that the wheat/corn treated with the blended urea gives the highest yield when 70% controlled-release urea is blended with 30% ordinary urea; the yields of wheat are 8 000 and 8 150 kg/hm2, respectively, an increase of 6.2% and 7.2% in yields over those when 100% controlled-release urea is used, 17.0% and 16.7% over those when 100% ordinary urea is used, 39.9% and 34.5% over the control, and the difference between them reaches 1% in the level of significance ; the yields of corn are 6 780 and 6 550 kg/hmz, respectively, a rise of 5.1% and 5.6% over those when 100% controlled-release urea is used; 16.2% and 17.8% over those when 100% ordinary urea is used, 22.1% and 20.8% over the control, and their difference is 1% in the level of significance.