竹炭包膜尿素的制备及其包膜效果研究  

Preparation and Controlled-release Characteristics of Bamboo-charcoal Coated Ureas

作　　者：曾鸿鹄[1] 纪锐琳[2] 王双飞[1] 朱义年[2] 张学洪[2] 王敦球[2] 

机构地区：[1]广西大学,广西南宁530004 [2]桂林工学院,广西桂林541004

出　　处：《农业环境科学学报》2008年第5期1826-1830,共5页Journal of Agro-Environment Science

基　　金：广西"新世纪十百千人才工程"专项资金资助项目(2004217);广西科学基金(桂科基0575103);广西科学研究与技术开发项目(桂科攻0632006-3B);广西2007年研究生科技创新计划项目(2007105960830M23);桂林市科学研究与技术开发项目(2006-45-1)

摘　　要：利用竹炭和聚丙烯树脂为包膜材料,制得不同粘结剂、不同包膜厚度和不同竹炭含量的18种竹炭包膜尿素。通过溶解试验、溶出试验与氨挥发试验,研究了所制备的包膜尿素在水中溶解特征。结果表明,包膜效果最好的2种竹炭包膜尿素BCCU1(AbX)和BCCU2(AbY)的含氮量分别为42.3%和43.5%,包膜率分别为8.04%和5.43%。尿素经过竹炭包膜后,其氮素初期溶出率和氮素累积溶出率明显下降,竹炭包膜尿素BCCU1和BCCU2的氮素累积溶出率分别比尿素降低16.27%和9.93%。氨挥发试验结果表明,在每公斤土壤中施氮600mg和1000mg水平下,竹炭包膜尿素BCCU1和BCCU2的氨挥发损失量分别比尿素减少31.8%和19.3%,21.82%和16.66%;在2种施肥水平下,BCCU1的挥发量分别比BCCU2减少15.49%和6.19%。18 different bamboo-charcoal coated ureas were prepared from normal urea by coating with bamboo-charcoal and bonding agents. Their nitrogen slow-release characteristics were investigated compared to un-coated urea. The results showed that the two best coated ureas, i.e., BCCU1 （AbX） and BCCU2 （AbY）, have nitrogen contents of 42.3% and 43.5% with coating rates of 8.04% and 5.43%, respectively. They presented slow-release characteristics of low nitrogen leaching and low ammonia volatilization. The accumulated nitrogen release rates of BCCU1 and BCCU2 were 16.27% and 9.93% lower than that of un-coated urea. The total ammonia volatilization of BCCU1 and BCCU2 decreased by 31.8% and 19.3% under the fertilization of 600 mg N per kg soil, 21.82% and 16.66% under the fertilization of 1 000 mg N per kg soil, respectively.

关 键 词：包膜尿素 竹炭 氮素溶出 氨挥发 

分 类 号：S145.5[农业科学—肥料学]