施氮对春玉米产量和经济效益的影响

采用随机区组设计试验,研究施氮对春玉米产量和经济效益的影响。结果表明,不同施氮量对春玉米经济性状、产量和经济效益的影响不同,各处理间产量差异极显著,以施氮量150kg/hm²的处理表现最佳;玉米产量和经济效益随施氮量的增加呈现先增加后降低的趋势;氮肥的农学效率随施氮量增加而降低。单位面积玉米产量和施氮量具有显著的回归关系,最高产量施氮量是:N161.9kg/hm²,最高产量为8351.9kg/hm²;最佳产量施氮量为:N144.7kg/hm²,最佳产量8324.1kg/hm²。

Effects of Applying Nitrogen Fertilizer on Yield and Economic Benefits of Spring Maize

This paper studied effects of applying nitrogen fertilizer on yield and econonuc benefits of spring maize by using random block design. The results showed that the effects of different nitrogen application rates on econonuc characters,yield and economic benefits of spring maize were different. Yield differences among the treatments were extremely significant. The treatment of applying nitrogen of 150 kg/hm~2 was the best. Maize yield and economic bene-fits displayed the trend of increasing first and then reducing with the increase of nitrogen application rate. Agrononuc efficiency of nitrogen fertilizer gradually reduced with the increase of nitrogen application rate. Maize yield and nitro-gen application rates had significant relation. The nitrogen application rate for the maximum yield of spring maize (8351. 9kg/hm~2) was 161.9kg/hm~2. The nitrogen application rate for the best yield of spring maize (8324.1kg/hm~2)was 144. 7kg/hm~2.