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当前位置: 首页 > 文章 > 土壤水分对包膜尿素氮素溶出特性影响的研究 沈阳农业大学学报 2011,42 (3) 296-299
Position: Home > Articles > Effect of Soil Mosisture on Nitrogen Release Characteristics of Coated Urea Journal of Shenyang Agricultural University 2011,42 (3) 296-299

土壤水分对包膜尿素氮素溶出特性影响的研究

作  者：
邹洪涛;于洋;曹敏建;虞娜;张玉玲;汪景宽;张玉龙
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
关键词：
土壤水分;硅藻土;沸石粉;包膜尿素;氮素溶出特性
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=N0[1-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。
译  名：
Effect of Soil Mosisture on Nitrogen Release Characteristics of Coated Urea
作  者：
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)
关键词：
soil moisture;diatomite;zeolite;coated slow-release urea;nitrogen release characteristics
摘  要：
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 soil moisture was higher than 80% of soil water holding capacity.The days for releasing 50% of nitrogen from coated urea was 4.6 d,0.2d and 0.9 d behind in the BG than in the BF urea at the 40%,80% and 100% water holding capacity treatments,respectively.The characteristics of nitrogen releasing could be described well by the first-order reaction kinetic equation N1=N0[1-exp(-kt)].In the equation,k was the constant of nitrogen releasing rate was smaller for the BF urea treatment.Our results showed that the release of nitrogen increased with increase of soil moisture.BG is better than BF as coated materials in controlling nutrient release.

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