| 杜马斯-碳氮分析仪法测定缓控释氮肥释放氮量 |
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| 引用本文： | 李桂花,吕子古,保万魁,温云杰,安永鹏,刘云霞,韩亚,汪洪.杜马斯-碳氮分析仪法测定缓控释氮肥释放氮量[J].农业工程学报,2014,30(23):275-280. |
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| 作者姓名： | 李桂花 吕子古 保万魁 温云杰 安永鹏 刘云霞 韩亚 汪洪 |
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| 作者单位： | 中国农业科学院农业资源与农业区划研究所，耕地培育技术国家工程实验室，农业部植物营养与肥料重点实验室 北京100081 |
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| 基金项目： | 中央级公益性科研院所专项资金（IARRP-2014-39）；国家重点基础研究发展计划(973计划)项目(2013CB127402) |
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| 摘 要： | 为了提高缓控释氮肥释放氮量的测定效率,避免样品消煮过程中的强酸与毒害气体物质等问题,该研究基于杜马斯法原理,利用碳氮分析仪,测定2种缓控释氮肥在25℃静水释放试验中,第1、3、7、14和28天肥料浸出液的氮浓度,计算缓控释氮肥释放氮量,并与传统常规的凯氏蒸馏滴定法测定结果间进行比较。结果表明:2种方法肥料浸出液中N浓度测定结果之间呈极显著线性相关关系,相关系数r=0.991(n=30,P0.01)。依据2种方法测定结果计算的氮素养分释放期彼此相差小于20%,符合国家标准《GB/T 23348-2009缓释肥料》及化工行业标准《HG/T 4215-2011控释肥料》的允许差范围。相比较传统的凯氏蒸馏滴定法,杜马斯-碳氮分析仪法测定缓控释氮肥释放氮量过程简便快捷,样品无需消煮,不涉及强酸不产生有毒有害物质。该结果为缓控释氮肥释放氮量新的测定方法提供了科学依据。
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| 关 键 词： | 氮 肥料 养分 缓控释氮肥 氮素释放 碳氮分析仪 杜马斯法 凯氏蒸馏滴定法 |
| 收稿时间： | 8/6/2014 12:00:00 AM |
| 修稿时间： | 2014/10/27 0:00:00 |
Determination of nitrogen release from slow and controlled-release fertilizers by Dumas process using TOC/TN analyzer |
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| Institution: | National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081,National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081,National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081,National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081,National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081,National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081,National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081 and National Engineering Laboratory for Improving Quality of Arable Land/Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081 |
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| Abstract: | |
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| Keywords: | nitrogen fertilizers nutrients slow/controlled release fertilizer nitrogen release TOC/TN analyzer dumas method kjeldahl distillation-titration method |
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