| 长期定位试验氮肥效应边际成本分析与最佳氮肥推荐 |
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| 引用本文： | 田昌玉,林治安,狄文亚,徐久凯,唐继伟,赵秉强.长期定位试验氮肥效应边际成本分析与最佳氮肥推荐[J].中国土壤与肥料,2022(1):33-39. |
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| 作者姓名： | 田昌玉 林治安 狄文亚 徐久凯 唐继伟 赵秉强 |
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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;成武县第二中学 |
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| 基金项目： | 现代农业产业技术体系德州综合实验站项目(CARS-03-01E);山东德州长期定位科学观测试验(1610132019032)。 |
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| 摘 要： | 回归反应实际氮肥与产量效应的函数,并通过合理分析边际成本组成计算出适宜的氮肥最佳施用量,是肥料效应函数法氮肥施肥推荐的关键.以13年长期定位试验为平台,化肥氮处理分别为0、45、90、120、180、240 kg/hm2,利用2015 ～ 2017年平均产量,建立长期试验的氮肥产量效应函数,求最佳氮肥推荐量.计算的边际...
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| 关 键 词： | 氮肥 施肥推荐 边际成本 效用函数 |
| 收稿时间： | 2020/9/24 0:00:00 |
Marginal costs of N effect and recommendation of optimum N fertilizer in long-term positioning test |
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| TIAN Chang-yu,LIN Zhi-an,DI Wen-y,XU Jiu-kai,TANG Ji-wei,ZHAO Bing-qiang.Marginal costs of N effect and recommendation of optimum N fertilizer in long-term positioning test[J].Soil and Fertilizer Sciences in China,2022(1):33-39. |
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| Authors: | TIAN Chang-yu LIN Zhi-an DI Wen-y XU Jiu-kai TANG Ji-wei ZHAO Bing-qiang |
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| Institution: | (Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081;The Second Middle School of Chengwu County,Chengwu Shandong 274299) |
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| Abstract: | To return to a function that reflects actual nitrogen fertilizer and yield effect,and calculate the appropriate optimal application amount of nitrogen fertilizer through reasonable analysis of marginal cost composition,are the key to the recommendation of nitrogen fertilizer by fertilizer effect function method.It can also provide a reasonable optimal yield for other fertilizer recommendation methods.Based on the 13-year long-term positioning test,the fertilizer nitrogen treatments was set up as N 0,45,90,120,180 and 240 kg/hm2.The average yield from 2015 to 2017 was used to establish the nitrogen fertilizer yield effect function to find the optimal recommended amount of nitrogen fertilizer.The marginal cost was calculated including marginal cost of nitrogen fertilizer,marginal cost of absorption of phosphorus by wheat and corn and marginal cost of absorption of potassium by wheat and corn.The nutrient cost of absorbing phosphorus and potassium was equivalent to that of fertilizer phosphorus and potassium.Using the relatively stable yield data of long-term positioning test,the effect equation of nitrogen fertilizer on the yield of wheat and corn was obtained,and the regression coefficient was greater than 0.9946.When marginal production to investment ratio was 2,optimal nitrogen application rate decreased from 207.15kg/hm2to 196.50 kg/hm2;When marginal production to investment ratio was 5,optimal nitrogen application decreased from193.54 kg/hm2to 158.55 kg/hm2.The recommended amount of nitrogen fertilizer can be reduced by improving the marginal cost calculation method,that is,the improvement the marginal cost calculation method can correct the problem that the current recommended fertilizer amount is too high. |
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| Keywords: | nitrogen fertilizer fertilization recommendation marginal cost utility function |
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