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本文通过在河南省封丘县进行的多年、多点田间试验,介绍了大面积经济施肥模型的建立与推荐施肥的理论和应用。研究明确应以正交多项式回归试验设计、平方根模型建立产量—肥料效应函数,以边际报酬率计算推荐施肥量。做到了可根据市场经济变化和农民的具体经济情况灵活地推荐施肥。还介绍了包括环境因子的综合建模以及适合省(市)、县和基层应用的计算机推荐施肥咨询系统。
Based on the multi-year and multi-field experiments conducted in Fengqiu County, Henan Province, this paper introduced the theory and application of large-area economic fertilization model establishment and recommended fertilization. The study should be explicitly designed by orthogonal polynomial regression design, the square root model to establish the yield - fertilizer effect function, calculated at the marginal rate of return of the recommended amount of fertilizer. So that according to the changes in the market economy and the specific economic situation of farmers flexible recommended fertilization. Also included is a comprehensive modeling that includes environmental factors and a computer-recommended fertilization advisory system for provincial (city), county, and grassroots applications.