| 土壤水分对包膜尿素氮素溶出特性影响的研究 |
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| 引用本文： | 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). |
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| 作者姓名： | 邹洪涛 于洋 曹敏建 虞娜 张玉玲 汪景宽 张玉龙 |
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| 作者单位： | 沈阳农业大学土地与环境学院/农业部东北土壤与环境重点开放实验室/土肥资源高效利用国家工程实验室,沈阳,110161 |
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| 基金项目： | 中国博士后科学基金项目(20090450158); 国家自然科学基金项目(31000936); 教育部重点项目(209032); “十一五”国家科技支撑项目(2007BAD89B02) |
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| 摘 要： | 研究土壤水分对自行研制的包膜尿素(BG、BF)氮素溶出特性的影响.采用室内恒温土壤培养方式,探讨土壤水分为田间持水量的10％、40％、80％和100％条件下包膜尿素氮素溶出特性.结果表明:土壤水分为田间持水量的40％以下时,BG和BF在各培养时期内的氮素溶出率都比较低,在培养第42天氮素溶出率仅为66.3％和68.4％,土壤水分在田间持水量的80％以上时,溶出率均达到了80％以上；土壤水分在田间持水量40％、80％和100％条件下,氮素溶出50％所需要的天数,BG型包膜尿素比BF型延长了4.6d 、0.2d和0.9d；氮素溶出特性可以用一级反应动力学方程N1=N01-exp(-kt)]描述,k为氮素溶出速率常数,包膜尿素BG的k值小于BF.土壤水分对包膜尿素氮素溶出率影响较大,随着土壤含水量的增加,氮素溶出率增大；硅藻土作为包膜材料对养分的缓释效果要好于沸石粉.
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| 关 键 词： | 土壤水分 硅藻土 沸石粉 包膜尿素 氮素溶出特性 |
Effect of Soil Mosisture on Nitrogen Release Characteristics of Coated Urea |
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| ZOU Hong-tao,YU Yang,CAO Min-jian,YU Na,ZHANG YU-ling,WANG Jing-kuan,ZHANG Yu-long.Effect of Soil Mosisture on Nitrogen Release Characteristics of Coated Urea[J].Journal of Shenyang Agricultural University,2011,42(3). |
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| Authors: | ZOU Hong-tao YU Yang CAO Min-jian YU Na ZHANG YU-ling WANG Jing-kuan ZHANG Yu-long |
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| Institution: | ZOU Hong-tao,YU Yang,CAO Min-jian,YU Na,ZHANG YU-ling,WANG Jing-kuan,ZHANG Yu-long (College of Land and Environmental Sciences Key Laboratory of Northeast Soil and Environment,MOA,National Engineering Laboratory for High Efficiency Utilization of Soil and Fertilizer,Shenyang Agricultural University,Shenyang 110161,China) |
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| 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 ... |
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| Keywords: | soil moisture diatomite zeolite coated slow-release urea nitrogen release characteristics |
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