干旱风沙灌漠土玉米田树脂包衣尿素施用效果研究

Effects of resin coated urea application on corn grown in aeolian sandy soil and irrigated desert soil

田间试验对比研究了树脂包衣尿素和普通尿素在灌漠土和风沙土两种土壤上种植玉米的肥料投入产出效益和产量差异。结果表明:树脂包衣尿素在灌漠土和风沙土两种土壤的玉米产量效应上均有良好的表现,与等氮量的普通尿素相比,灌漠土玉米增产6.4%,风沙土玉米增产15.4%。而在灌漠土和风沙土上分别施用是常规氮肥用量50%和67%的包衣尿素,则可获得与普通尿素相等的产量。灌漠土上施用树脂包衣尿素的经济效益好于普通尿素。风沙土上施用等氮量包衣尿素时,经济效益最好,施用67%包衣尿素时,经济效益略低。灌漠土与风沙土两个试验点比较,风沙土试验点不但施氮量比灌漠土高出127.5 kg/hm2,而且其产量还略低于灌漠土试验点。

The field experiments were carried out to investigate the effects of urea and resin coated urea on yield and economic benefit of corn planted in aeolian sandy soil and irrigated desert soil. The results showed that resin coated urea presented well in the two types of soil in terms of corn yield. Compared to urea with the same N application rate, the yield of corn with resin coated urea was increased by 6.4% in aeolian sandy soil and 15.4% in irrigated desert soil. By applying resin coated urea with 50% and 67% of conventional N level in irrigated desert soil and in aeolian sandy soil respectively, the yield of corn was equivalent to that with urea at conventional N level. In irrigated desert soil, the economic benefit of resin coated urea application was superior to that of urea; In aeolian sandy soil, the economic benefit of resin coated urea application at conventional N level was the highest, however, when the application rate was reduced to 67% of conventional N level, the benefit of resin coated urea became slightly lower. It was also confirmed that the corn yield in aeolian sandy soil was a little lower than that in irrigated desert soil even though the N application rate was raised by 127.5 kg/hm^2.