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通过田间试验,研究了硫膜和树脂膜控释尿素对小麦产量、品质和耕层土壤无机氮含量及氮素利用率的影响.结果表明:与普通尿素相比,硫膜和树脂膜控释尿素均能显著提高小麦籽粒产量和品质,增产幅度达10.4%～16.5%,小麦籽粒蛋白质和淀粉含量分别提高5.8%～18.9%和0.3%～1.4%;两种控释肥均能有效保持耕层土壤无机氮含量,且其氮素后移的功效满足了小麦生育后期对氮素的需求;有效提高了氮肥偏生产力,降低了土壤氮素依存率(降幅11.0%～17.3%),提高了氮素利用率(增幅58.2%～101.2%).其中,树脂膜控释尿素比硫膜控释尿素表现出更好的增产效应,实现了氮素的高效利用.
The field experiments were conducted to study the effects of sulfur and resin-coated controlled-release urea on wheat yield, quality, soil inorganic nitrogen content and nitrogen utilization in paddy soil.The results showed that compared with common urea, Urea can significantly increase the yield and quality of wheat grain, with the yield increasing rate reaching 10.4% ~ 16.5%, and the protein and starch content in wheat grain increasing by 5.8% ~ 18.9% and 0.3% ~ 1.4% respectively. Layer soil inorganic nitrogen content, and the effect of nitrogen migration to meet the late growth stage of wheat nitrogen demand; effectively increase the nitrogen fertilizer partial productivity, reduce the soil nitrogen dependency (down 11.0% to 17.3%), increased Nitrogen utilization rate (58.2% -101.2% increase), of which, the controlled release urea resin membrane showed a better stimulation effect than the sulfur controlled release urea membrane, which realized the efficient use of nitrogen.