摘要
以土壤类型生态区设置多点田间试验，建立施肥利润方程，寻优决策出优化施肥组合，作为这一生态区域土壤类型的基本施肥量。对施肥效益影响最大的因素，通过试验确定为７种效益参数，在基本施肥量的基础上，计算实际施肥量，全程电脑管理。把肥料效应函数法、养分平衡法等定量施肥法综合运用在一起，宏观（土壤生态区）控制与微观（具体地点）实际相结合，决策出的施肥方案符合实际。
Multi sites field experiments were set up according to the ecological area of soil types and the profit equation of fertilizer application was establisted and the comdination of optimum fertilizer application was sought out which was used as the basic amount of fertilizer application for the soil types in this ecological area.The factors influencing the benefit of fertilizer application most were determined through experiments to be seven benefit parameters.The practical amount of fertilizer application was computed on the basis of the basic amount of fertilizer application and the whole process was managed with a computer.Such quantitative methods of fertilizer application as fertilizer benefit function,macro control(soil ecological area) and microscopic reality(the concrete sites) were combined to determine the plans of fertilizer application which suited reality.The yield and the benefits were high.
基金
河北省科委"八五"农业综合试验区研究项目
