| 浙江省水稻土“因产定氮”基本公式及其有关参数的探讨 |
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| 引用本文： | 周鸣铮,王竺美. 浙江省水稻土“因产定氮”基本公式及其有关参数的探讨[J]. 土壤学报, 1987, 24(2): 127-134 |
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| 作者姓名： | 周鸣铮 王竺美 |
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| 作者单位： | 浙江省农科院土壤肥料研究所;杭州市农科所 |
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| 摘 要： | 历史上的因产定肥,一则缺乏科学的产量依据,二则没有测定土壤供氮量的简便方法,应用不方便.本文提出因产定氮的式子是:N需=(0.018(Y-1.05X)/E肥.式中:Y为该土壤上的水稻最高可得产量;X为无肥区的基础产量,Y与X之间的统计关系已见于《土壤学报》19卷315页一文中.参数0.018为肥料氮所创造的产量每斤稻谷(含稻秸秆)在本田应吸收氮的量(单位均为斤/亩).由于消除了土壤氮所创造的产量,故不再存在难以测定土壤供氮的问题.
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STUDIES ON NEW EQATIONS AND ITS PARAMETERS FOR CALCULATION OF THE REQUIREMENT OF NITROGEN ACCORDING TO THE MAXIMUN YIELD OF RICE PREDICTED |
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| Zhou Mingzheng and Wang Zhumei. STUDIES ON NEW EQATIONS AND ITS PARAMETERS FOR CALCULATION OF THE REQUIREMENT OF NITROGEN ACCORDING TO THE MAXIMUN YIELD OF RICE PREDICTED[J]. Acta Pedologica Sinica, 1987, 24(2): 127-134 |
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| Authors: | Zhou Mingzheng and Wang Zhumei |
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| Affiliation: | Institute of soil and Fertilizer, Zhejiang Academy of Agricultural Science;Institute of Agricultural Science, Hangzhou |
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| Abstract: | The peak output of rice can be calculated from the basic fertility of soil with an equation proposed by the authors.In this paper,an additional equation to calculate the requirement of N for the predicted maximum yield of rice are proposed as follows:NR=(0.018(Y-1.05X)/EFwhere X is the yield of rice on certain rice field without fertilization,Y,the maximum obtainable yield of rice on the same field well fertilized.N,nitrogen requirement for yield Y,Er,efficiency of the fertilizer applied.Experiments has shown that the eqation a practicable. |
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