植物营养与肥料学报2010,16(1)：214-218 Plant Nutrition and Fertilizer Science
包膜及其与生化抑制剂结合型尿素在草甸棕壤中
尿素态氮溶出特征李东坡，武志杰"，梁成华2
(1中国科学院沈阳应用生态研究所，辽宁沈阳110016；2沈阳农业大学土地与环境学院，辽宁沈阳110161）
摘要：在室内恒温培养条件下，以日本70d聚烯烃包膜尿素和大题粒尿素为对照，研究4种丙烯酸树脂（MMA)包膜及其与生化抑制剂结合尿索肥料在土壤中尿素态氮济出与水解特征，以确定不同种MMA包膜尿素在土壤中缓/ 控释效果与尿索转化机理。结果表明，4种MMA包膜尿素在土壤中尿素累积溶出量在48d后达到最大值，接近 100%，尿索态氮累积落出80%的时间分别在第24和28d，时段平均溶出率最高峰值均出现在9~2d，为7.73%/d
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墩强。关键词：内烯酸树脂；包膜尿素；生化抑制剂；尿素态氮溶出特征
中图分类号：S145.5；S482.8
文献标识码：A
文章编号：1008505X(2010)010214-05
Nitrogen release characteristics of coated urea amended with
biological inhibitors in meadowbrown soil
U Dong-po', WU Zhi-jie', LIANG Cheng-hua?
(1 Institue of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China; 2 College of Land and Ensironment, Shenyang Agriculural University, Shenyang, Liaoning I1016, China)
Abstract: Using a coated urea (Polyolefin-coated urea, 7O 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 re sult 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%/d8.04 %/d. The saae oaaae eeseaderos aro naiaone and NBPT cause a significant delay on urea release.
Key words: acrylic resin; coated urea; biological inhibitor; urea nitrogen release characteristic
新包膜肥料的研制，首先需在纯水中进行其养分释放曲线和控释特点研究，以便评价其养分控制与释放性能。但实践证明，包膜肥料在纯水中与土壤中的养分释放存在明显差异。在农业生产中，不可能用包膜肥料在纯水中的测定数据评价其在土壤
收稿日期：2009-02-16
接受日期：20090706
中的性能。由于水是均一相体系，影响因素单一，土壤水分实际上是各种养分离子的盐落液，并含有一定种类和数量的微生物，对包膜层和肥料核芯的作用不同于纯水；同时，包膜肥料的养分释放是一个物质量不断变化的动态过程，受土壤pH、土壤水分、
基金项目：“十一五"国家科技支撑计划项目（2006BAD10B06，2006BAD10B01)；农业部国家公益性行业科研专项计划项目"绿色农业科学研究与
示范"(2007-3)资助。
Tel: 02483970384, E-mail; lidp@iae.ac.cn, lidp888@ sina.com
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