华北农学报2011，Vol.26Issue(5)：199-204,6.
变性淀粉包裹型尿素对氮素释放特性及生物学效应的影响
The Impact of Modified Starch-coating-urea on Nitrogen Release Characteristics and Biological Effect
摘要
Abstract
Water dissolution rate method, soil column leaching method and pot experiment were used to study the nitrogen release and biological effect of Urea which coated by modified starch. The results showed that; during the water dissolution rate method and soil column leaching method, the nitrogen release of FCU had many differences with the RCU-J and RCU-C ,but the nitrogen release of RCU-J and RCU-C was similar,and compared with in water, the nitrogen release rate of FCU in soil reduced significantly,and the releasing curve changed greatly. During the corn pot experiment at the seedling stage,under the condition of excessive and normal water,FCU promoted the dry matter weight and nitrogen uptake compared with Urea. Under the condition of drought stress, the reduction of the two indexes of FCU were relatively moderate compared with RCU. According to the correlation analysis of the results measured by soil column leaching method and pot experiment of FCU,the two methods had significant correlation, the soil column leaching method can be used to evaluate FCU,and it was better to reflect the actual slow-release characteristics by using the two methods together.关键词
变性淀粉包裹型尿素/氮素释放特性/生物学效应Key words
Modified starch-coating-urea/ Nitrogen release characteristics/ Biological effect分类
农业科技引用本文复制引用
吴欢欢,窦菲,王丽英,陈丽莉,翟彩霞,李若楠,张彦才,霍习良..变性淀粉包裹型尿素对氮素释放特性及生物学效应的影响[J].华北农学报,2011,26(5):199-204,6.基金项目
国家"十一五"科技支撑计划(2007 BAD87 B04-01) （2007 BAD87 B04-01）
