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在河南驻马店砂姜黑土区及延津潮土区对大颗粒包膜尿素控释肥(CRU)在冬小麦上的施用效果进行了研究。结果表明:相同氮素用量时,大颗粒包膜尿素控释肥比普通尿素(BU)增产,即在100%用量、75%用量及50%用量相比时,驻马店试验增产率为5.7%、10.26%、13.5%,延津试验增产率为3.3%、11.7%、10.4%,增产效果显著。大颗粒包膜尿素控释肥的比表面积较小,可以大量节省包膜材料,减少土壤污染。
The application effect of large particle coated urea controlled release fertilizer (CRU) on winter wheat in Shajiang black soil area and Yanjin soil area of Zhumadian, Henan Province was studied. The results showed that when the same amount of nitrogen was applied, the release rate of large-particle coated urea was higher than that of common urea (BU), that is, the yield increase was 5.7% in 100%, 75% and 50% 10.26% and 13.5% respectively. The yields of Yanjin experiment were 3.3%, 11.7% and 10.4% respectively, and the yield increase was significant. Large particle coated urea controlled release fertilizer has a smaller specific surface area, which can save a lot of coating material and reduce soil pollution.