Study on the Nitrogen Release Law of Bamboo Charcoal-coated Urea and Its Biological Utilization Effects  

竹炭包膜尿素的氮素释放规律和生物利用效果研究(英文)

作　　者：纪锐琳[1] 朱义年[1] 张爱莉[1] 张学洪[1] 

机构地区：[1]桂林工学院资源与环境工程系,广西桂林541004

出　　处：《Agricultural Science & Technology》2007年第3期53-58,67,共7页农业科学与技术（英文版）

基　　金：Supported by the Special Foundation of"Guangxi NewCentury National Ten,Hundred and Thousand Talent Project"(2004217);the Sci-ence Foundation of Guangxi Province(Guikeji0575103)~~

摘　　要：[Objective] The study about the nitrogen releasing law of bamboo-charcoal coated urea and the biologic utilization effect was to find the coated urea with high efficiency,low price and simple production technology.[Method]Two kinds of bamboo-charcoal coated urea(BCCU)with different coating thickness were made by using bamboo-charcoal and macromolecule polymer as coating material.The experiments of soil eluviate,ammonia volatilization in corn field and potted plant of corn were conducted to study the nitrogen releasing law and the biologic utilization effect of self-made BCCU.[Result]The BCCU showed some slow-release capability and their accumulated nitrogen releasing rates in 29 d were 9.93%-16.27% lower than that of normal urea.Compared with the normal urea,the volatilization rate of ammonia in BCCU reduced to 16.66%-31.8%,the biomass of corn and nitrogen utilization rate increased by 12.8%-24.1% and 10.5%-16.99%,respectively.[Conclusion]Bamboo-charcoal in coated urea not only had some slow-release capability,but also had some adsorbability,which would reduce the eluviation and volatilization of nitrogen and protect environment from N pollution.[ Objective] The study about the nitrogen releasing law of bamboo-charcoal coated urea and the biologic utilization effect was to find the coated urea with high efficiency, low price and simple production technology. [ Method ] Two kinds of bamboo-charcoal coated urea （BCCU） with different coating thickness were made by using bamboo-charcoal and macromolecule polymer as coating material. The experiments of soil eluviate, ammonia volatilization in corn field and potted plant of corn were conducted to study the nitrogen releasing law and the biologic utilization effect of self-made BCCU. [ Result ] The BCCU showed some slow-release capability and their accumulated nitrogen releasing rates in 29 d were 9.93% - 16.27% lower than that of normal urea. Compared with the normal urea, the volatilization rate of ammonia in BCCU reduced to 16.66% - 31.8%, the biomass of corn and nitrogen utilization rate increased by 12.8% -24.1% and 10.5% -16.99%, respectively. [ Conclusion] Bamboo- charcoal in coated urea not only had some slow-release capability, but also had some adsorbability, which would reduce the eluviation and volatilization of nitrogen and protect environment from N pollution.

关 键 词：Bamboo-charcoal Coated urea Utilization rate Eluviation loss Ammonia volatilization 

分 类 号：S145.6[农业科学—肥料学]