摘要
采用静态吸收和土柱淋溶试验方法,分析对比了3种不同用量坡缕石包膜尿素与普通尿素施入土壤后对尿素氮行为的影响,结果表明:在土壤中施用坡缕石包膜尿素较普通尿素减少10.38%~26.24%的氨挥发损失,减少5.88%~27.74%的氮素(NO_3^--N+NH_4^+-N)淋溶损失,20%的坡缕石包膜尿素能显著提高土柱土壤NH_4^+-N含量,3种坡缕石包膜尿素都能极显著提高土柱土壤NO_3^--N含量。坡缕石包膜后能减少尿素氨的挥发,降低NH_4^+-N和NO_3^--N的淋失,提高土壤NH_4^+-N和NO_3^--N含量,以20%的坡缕石包膜尿素的综合生态效应最好。
Static absorption and soil column leaching methods were used to study and analyze the difference of N form between from applied urea coated with three different thicknesses of palygorskite and uncoated urea. The results show that coating urea with palygorskite decreases ammonia volatilization by 10.38%~26.24% compared with uncoated urea. Coating also reduces N （NO3--N＋NH4＋-N） leaching by 5.88%~27.74%. With 20% palygorskite coating treatment, urea significantly increases the NH4＋-N in column soil. The three different palygorskite coatings lead to a significant increase in NO3--N in column soil. Urea coated with palygorskite decreases ammonia volatilization and N （NO3--N＋NH4＋-N） leaching, increases NHn＋-N and NO3--N in the soil. More importantly, palygorskite coating of 20% induces optimal ecological conditions.
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2009年第3期443-447,共5页
Chinese Journal of Eco-Agriculture
基金
教育部博士点基金项目(200807330006)
国家科技支撑计划项目(2006BAD21B05)资助
关键词
坡缕石
包膜尿素
氮行为
氮淋溶
氮挥发
生态效应
Palygorskite, Coatet urea, Nitrogen form, Nitrogen leaching, Aammonia volatilization, Ecological condition
