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1984—1986年,在陕西省蒲城县设置了二组三因素五水平旋转设计试验,对影响小麦产量的施肥(包括氮肥、磷肥、有机肥)播期、播量等主要因素加以综合研究。建立了黄土旱塬地区冬小麦增产栽培措施的二个主要模式方程和多个因素之间交互作用的若干子模式方程。根据试验结果利用计算机田间模拟寻优得出该地区小麦亩产250—300kg 丰产组合方案,根据这些模式方程和所得到125×2的不同因素相配合下的不同产量水平,因地制宜地制定秋播措施方案,用来指导生产、预测产量。
From 1984 to 1986, two sets of three-factor and five-level rotation design tests were set up in Pucheng County, Shaanxi Province to comprehensively study the main factors affecting the sowing date and seeding rate of wheat yield including nitrogen fertilizer, phosphate fertilizer and organic fertilizer. Several sub-equation equations for interaction between multiple factors and their effects on yield-increasing winter wheat cultivation in the Loess Plateau have been established. According to the results of the experiment, computer simulation of the field was used to find out the best combination plan of 250-300kg per mu for wheat in the region. According to the different yield levels in accordance with these model equations and the different factors of 125 × 2, the autumn sowing measures Program, used to guide the production, forecast production.