【作者】 王德汉； 彭俊杰； 廖宗文；

【Author】 WANG De-han, PENG Jun-jie, LIAOZong-wen(New Fertilizer Resources Lab. South China Agricultural University, Guangzhou 510642.China)

【机构】 毕南农业大学新肥料资源研究室；

【摘要】 利用造纸黑液木质素对尿素进行包膜处理,制成三种不同包膜厚度的缓释尿素(LCU),通过土壤淋溶试验和盆栽试验研究了木质素包膜尿素氮素释放规律和生物利用效果,结果表明:木质素包膜尿素具有不同程度的缓释性能,木质素包膜尿素中氮素累积溶出速率比普通尿素低12%;施用木质素包膜尿素的玉米生物量均大于普通尿素,尿素氮素利用率平均提高了3.59%。木质素对尿素氮转化影响除了物理控释作用外,其降解产物还具有一定的硝化抑制作用,能减少氮素的淋失和对环境的污染。更多还原

【Abstract】 Coated urea with lignin from paper-making black liquor were made in different layer thickness. Nitrogen release rate of coated urea with lignin (LCU) in soil was determined by leaching experiment, pot experiment was conducted to study the fertilizer efficiency of LCU used as a slow-release nitrogen fertilizer on corn. Results obtained showed that: urea coated with lignin presented slow-release property to different degree. Nitrogen release rate of LCU was about 12% lower than that of normal urea, utilization ratio of nitrogen was about 3.59% higher than that of normal urea. The results indicated that LCU could increase the yield of the corn and utilization ratio of nitrogen compared with un-coated urea. In addition to its coating slow-release effect, the degradation product of lignin was a kind of effective nitrification inhibitor, which could reduce the loss of nitrogen and protect environment from N pollution.更多还原