陕北丘陵区梯田马铃薯综合农艺措施数学模型的研究

采用五元二次正交旋转回归设计,对影响陕北丘陵区梯田马铃薯产量最主要的播期、密度、施氮、施磷和有机肥五项农艺措施进行田间试验。通过电脑分析,明确了各项农艺措施的主次作用,建立起综合农艺措施优化数学模型,筛选出该地区不同产量水平及亩产大于1800公斤的最佳农艺措施组合方案,为陕北丘陵区梯田马铃薯的高产、优质和规范化栽培提供了科学依据。

A STUDY ON THE MATHEMATICAL MODEL OF POTATO WITH COMPREHENSIVE CULTURAL PRACTICE IN THE HILLY GULLY REGION NORTH OF SHAANXI PROVINCE

In 1989, the parameter tests were performed in field to establish a mathematical model under the terrace condition, The contribution order of testing factors to potato yield is sowing date>density>nitrogen fertilizer>phosphorus fertilizer>organic fertilizer Searching for the optimization of the model with the computer, we assume that step is one. Five factors and five levels are composed of 3125 designs, of which yield of 263 designs reaches more than 1800kg/mu. By frequency analysis, the best agronomit measures can be marked out and listed below. The sowing date is 28th of May to first of June, the potato density is 4718～4993 plants/mu, nitrogen fertilizer is 9.7～10.3kg mu, phosphate fertilizer is 5.54～6.41kg/mu and organic fertilizer is 3652～3952kg/mu.