沈阳农业大学学报2011，Vol.42Issue(3)：296-299,4.
土壤水分对包膜尿素氮素溶出特性影响的研究
Effect of Soil Mosisture on Nitrogen Release Characteristics of Coated Urea
摘要
Abstract
The characteristics of nitrogen release from inorganic mineral coated urea (BG and BF) under different soil moisture was studied. The nitrogen releasing characteristics was determined at 10%, 40%, 80% and 100% of soil water holding capacity at constant temperature by soil culture experiment. Results showed that the release of nitrogen was low when soil moisture was below 40% of soil water holding capacity, which was 66.3% and 68.4% in the BG and BF urea, respectively. The release of nitrogen was more than 80% when soil moisture was higher than 80% of soil water holding capacity. The days for releasing 50% of nitrogen from coated urea was 4.6 d, 0.2d and 0.9 d behind in the BG than in the BF urea at the 40%, 80% and 100% water holding capacity treatments, respectively. The characteristics of nitrogen releasing could be described well by the first-order reaction kinetic equation N1=No[l-exp(-ft)]- In the equation, k was the constant of nitrogen releasing rale was smaller for the BF urea treatment. Our results showed that the release of nitrogen increased with increase of soil moisture. BG is better than BF as coaled materials in controlling nutrient release.关键词
土壤水分/硅藻土/沸石粉/包膜尿素/氮素溶出特性Key words
soil moisture/ diatomite/ zeolite/ coated slow-release urea/ nitrogen release characteristics分类
农业科技引用本文复制引用
邹洪涛,于洋,曹敏建,虞娜,张玉玲,汪景宽,张玉龙..土壤水分对包膜尿素氮素溶出特性影响的研究[J].沈阳农业大学学报,2011,42(3):296-299,4.基金项目
中国博士后科学基金项目(20090450158) （20090450158）
国家自然科学基金项目(31000936) （31000936）
教育部重点项目(209032) （209032）
“十一五”国家科技支撑项目(2007BAD89B02) （2007BAD89B02）
