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最佳施肥水平由各种自然—生物及经济的参数所决定.自然—生物参数包括各种描述土壤、气候特性的变量及表示肥料—作物反应特性的系数.经济参数包括肥料及作物价格,农业上可动用资金及其他农业投资可能得到的报酬等.在给定气候条件下作物最佳施肥模式的建立,首先必须通过土壤测定(测定土壤有效养分)和肥料—作物反应的研究(增加养分供应所得到的产量增加),以取得各种基本参数.然后再根据肥料和产品价格的调查,农业上的活动资金等选择适当的模式即可定出各农地该年份的最佳施肥水平.
Optimum fertilization levels are dictated by a variety of natural-biological and economic parameters Natural-biological parameters include a variety of variables that characterize soil and climatic characteristics and coefficients that represent fertilizer-crop response characteristics Economic parameters include fertilizer and crop prices, agriculture Available funds for other investments in agriculture and possible compensation for other agricultural investments, etc. The establishment of optimal crop fertilization patterns for a given climatic condition must first be studied through soil testing (measuring soil available nutrients) and fertilizer-crop responses (increasing nutrient supply The increase of output) to obtain a variety of basic parameters.And then according to the survey of fertilizer and product prices, agricultural activities, funds and select the appropriate mode to determine the best fertilization level for each year of the agricultural land.