论文部分内容阅读
根据黑龙江省坡耕地薄层黑土综合培肥试验数据,用灰色系统理论建立了限制因素的单项预测模型,然后建立了各肥力限制因素与粮豆产量综合因素的GM(l,N)模型,预测结果为定向培肥土壤提供理论依据.表5.
According to the experiment data of thin layer black soil on sloping cultivated land in Heilongjiang Province, a single forecasting model of the limiting factors was established by using the gray system theory. Then the GM (l, N) model of the factors controlling the fertility and grain yield was established. The results provide theoretical basis for directional fertilization of soil.