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| 氮肥利用率测定规范化探讨 |
| Discussing the Determination Standard of Recovery Efficiency of Nitrogen Fertilizer |
| Received:January 18, 2016 |
| DOI：10.13254/j.jare.2016.0025 |
| 中文关键词: 氮肥利用率;测定规范;计算方法 |
| 英文关键词: recovery efficiency of nitrogen fertilizer;determination specification;calculation method |
| 基金项目:现代农业产业技术体系建设专项经费（CARS-3-2-18）；国家科技支撑计划课题（2015BAD23B02） |
| Author Name | Affiliation | E-mail | | TIAN Chang-yu | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | LIN Zhi-an | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | ZHAO Bing-qiang | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | zhaobingqiang@caas.cn | | CHE Sheng-guo | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | SUN Wen-yan | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | LI Zhi-jie | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | |
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| 中文摘要: |
| 氮肥利用率是一个评价施氮产量效益和环境效应的重要指标，这个指标的计算和测定存在计算结果偏低和结果变异大的问题，希望通过研究提出规范、科学、合理的氮肥利用率测定方法。采用长期氮肥检测定位试验结果，分析空白对照和施肥处理小麦产量的逐年变化特征，应用常规差减法计算氮肥利用率，研究其年际间变化特点，提出测定氮肥利用率的规范的探讨。氮肥利用率测定规范：第一，空白对照吸收氮素达到相对稳定；第二，施肥处理作物吸收氮素量相对稳定；第三，必须采用稳定期内若干年的平均值。通过规范化的测定和计算，能够计算出比较合理的氮肥利用率参数，在施肥量120～180 kg N·hm-2范围内的氮肥利用率为69.2%～76.2%。建议氮肥利用率的测定遵循一定的测定规范，通过制定测定规范，测定出正确合理的氮肥利用率参数具有可比性，便于应用于科研和生产。 |
| 英文摘要: |
| Recovery efficiency of nitrogen fertilizer(REN) is an important index for the increasing crop yield and reducing environmental benefits of nitrogen fertilizer. But the determination and calculation methods of REN have some problems to study. They are lower rate and higher variability of the rate than it should be. The long-term nitrogen fertilizer location test had been taken since 2007 to analyze the nitrogen uptake rate of wheat year after year and the REN rate was calculated annually. A reasonable measurement specification of REN determination method was put forward. The REN measurement specification was:(1)The wheat nitrogen uptake of CK kept relatively stable after a few years; (2)The wheat nitrogen uptake ratio of fetilized treatment retained stable; (3)REN must be used the average of 3 years of steady period value. With this measurement specification of REN determination method, REN rate was in the range of 69.2%~76.2%(Wheat) when applied nitrogen fertilizer in range of 120~180 kg N·hm-2. REN determination method should follow this specification. In this case the correct and reasonable REN parameter can be measured. The reasonable REN can be applied in scientific research and production. |
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