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作 者 ：李东坡, 武志杰, 梁成华

期 刊 ：植物营养与肥料学报 2010年 16卷 1期 页码：214-218

关键词：丙烯酸树脂；包膜尿素；生化抑制剂；尿素态氮溶出特征；

Keywords:biological inhibitor, urea nitrogen release characteristic,

摘 要 ：在室内恒温培养条件下，以日本70 d聚烯烃包膜尿素和大颗粒尿素为对照，研究4种丙烯酸树脂（MMA）包膜及其与生化抑制剂结合尿素肥料在土壤中尿素态氮溶出与水解特征，以确定不同种MMA包膜尿素在土壤中缓/控释效果与尿素转化机理。结果表明，4种MMA包膜尿素在土壤中尿素累积溶出量在48 d后达到最大值，接近100%，尿素态氮累积溶出80％的时间分别在第24和28 d，时段平均溶出率最高峰值均出现在9～12 d，为7.73%/d～8.04%/d。4种MMA包膜肥料尿素态氮在土壤中累积残留量高峰值分别出现在20和24 d。MMA膜和NBPT共同作用对抑制尿素释放作用效果十分显著， 其结合型肥料对抑制尿素释放作用最强。

Abstract:Using a coated urea (Polyolefin-coated urea, 70 day, POCU) made in Japan and a conventional granular urea as check, nitrogen release characteristics of four kinds urea amended with biological inhibitor and coated or coated by acrylic resin fertilizers in Meadow Brown Soil are examined under constant temperature incubating in laboratory. The result indicate that the maximum accumulative urea nitrogen released rate for four acrylic resin coated urea fertilizers was all observed after 48th day, up to 100% urea-N. The date for accumulative urea nitrogen released rates up to 80% was at 24th day and 28th day, respectively. The maximum of average release rates per unit time is 7.73％/d-8.04％/d. The maximum of residue urea nitrogen in soil appears at 20 th day and 24 th day, respectively. The mixture of acrylic resin and NBPT cause a significant delay on urea release.

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