两种缓控释尿素缓释特性比较分析
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摘要
通过静水溶出率法比较了两种缓控释尿素的缓控特性。结果表明,两种不同缓控释尿素的初期养分释放率、养分释放期以及养分释放期内日平均释放速率均存在差异。A型缓控释尿素溶解速率慢,释放周期长,其养分释放期可达43 d,其释放速率在60 d之内均呈上升趋势;B型缓控释尿素溶解速率快,释放周期短,养分释放期为28 d,其在35 d前释放速率较快,35 d已累积释放84.63%,后期尿素释放较少,释放速率趋于平缓。
The release characteristics of two different slow controlled release fertilizers were compared by the method of leaching in water. The results showed that there were differences in the initial nutrient release rate, the nutrient release longevity,and daily average release rates between the two different fertilizers. Type A slow-release urea had a slow dissolution rate and a long release period, its nutrient release period was 43 days, and the release rate showed an upward trend within 60 days.Type B slow-release urea had a fast dissolution rate and a short release period, which nutrient release period was 28 days.The release rate of type B slow-release urea was fast in 35 days, and the cumulative release was 84.63% in 35 days. Later release of urea was less, and the late release rate tended to be gentle.
The release characteristics of two different slow controlled release fertilizers were compared by the method of leaching in water. The results showed that there were differences in the initial nutrient release rate, the nutrient release longevity,and daily average release rates between the two different fertilizers. Type A slow-release urea had a slow dissolution rate and a long release period, its nutrient release period was 43 days, and the release rate showed an upward trend within 60 days.Type B slow-release urea had a fast dissolution rate and a short release period, which nutrient release period was 28 days.The release rate of type B slow-release urea was fast in 35 days, and the cumulative release was 84.63% in 35 days. Later release of urea was less, and the late release rate tended to be gentle.
引文
[1]吴建富,施翔,肖青亮.我国肥料利用现状及发展对策[J].江西农业大学学报,2003,25(5):725-727.
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[7]王亮,秦玉波,于阁杰,等.新型缓控释肥的研究现状及展望[J].吉林农业科学,2008,33(4):38-42.
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[9]段路路,张民,刘刚,等.缓控释肥料养分释放特性评价及快速测定方法研究[J].土壤学报,2009,46(2):299-307.
[10] GB/T 23348-2009,缓释肥料[S].
[11]左秀锦,王祯鑫,戴小敏,等.紫外分光光度法测定控释尿素的透膜扩散速率[J].光谱学与光谱分析,2006,26(6):1151-1154.
[12]孙啸天.包膜缓释尿素养分释放特性及其作物效应研究[D].合肥:安徽农业大学,2016.
[2]李军,黄敬峰,程家安.我国化肥施用量及其可能污染的时空分布特征[J].生态环境,2003,12(2):145-149.
[3] LIU J G,DIAOND J. China's environment in a globalizing world-How China and the rest of the world affect each other[J].Nature,435(30):1179-1186.
[4] XING G X,ZHU Z L. Reginonal nitrogen budgets for China and its major watersheds[J].Biogeochemistry,2002,57/58:405-427.
[6]韩晓日.新型缓/控释肥料研究现状与展望[J].沈阳农业大学学报,2006,37(1):3-8.
[7]王亮,秦玉波,于阁杰,等.新型缓控释肥的研究现状及展望[J].吉林农业科学,2008,33(4):38-42.
[8]高义武,张勇.推广施用缓控释肥促进土壤资源可持续发展[J].中国农技推广,2009,25(1):46-47.
[9]段路路,张民,刘刚,等.缓控释肥料养分释放特性评价及快速测定方法研究[J].土壤学报,2009,46(2):299-307.
[10] GB/T 23348-2009,缓释肥料[S].
[11]左秀锦,王祯鑫,戴小敏,等.紫外分光光度法测定控释尿素的透膜扩散速率[J].光谱学与光谱分析,2006,26(6):1151-1154.
[12]孙啸天.包膜缓释尿素养分释放特性及其作物效应研究[D].合肥:安徽农业大学,2016.