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以回归设计为主进行田间试验,对河西灌区不同生态、土壤类型下春小麦氮磷化肥经济合理施用技术做系统研究。试验结果经微机分析选模拟合,聚类归并,寻优和吻合度测验,在提出施肥效应方程和土壤养分与地力产量相关式的基础上,建立反映不同类区土壤养分、施肥量与产量关系的优化综合施肥模式,通过测定土壤养分,确定不同土壤供肥水平下经济合理施肥量,预报产量及其经济效益。经验证示范,由施肥模式确定的施肥量及预报产量在实际生产中重现性好,准确可行,且效益显著。
Based on the regression design, field experiments were conducted to systematically study the economic and rational application of nitrogen and phosphorus fertilizers under different ecological and soil types in Hexi Irrigation Area. The results of the experiment were selected by computer analysis, clustering, merging, optimization and goodness of fit test. Based on the formula of fertilization effect and correlation between soil nutrient and soil fertility, the relationship between soil nutrient, fertilizer amount and yield was established Optimized fertilization mode was adopted to determine the economic and reasonable fertilization amount, forecast yield and economic benefits under different levels of soil fertility by measuring the soil nutrients. Proven demonstration, fertilization by the fertilization mode to determine the amount and forecast production in the actual production of reproducible, accurate and feasible, and significant benefits.