摘要
灰色聚类分析表明,不同种植模式中,以模式1(麦玉苕,中厢绿肥)培肥土壤效果最佳,其次是模式2(麦玉苕,中厢挑沙),模式4(麦玉苕,窄厢挑沙)欠佳,模式3(麦玉苕,中厢大麦)培肥土壤效果最差;保墒效果以模式1最佳,模式3次之,模式2及模式4最差。灰色关联分析表明,同一种土壤养份在不同种植模式中,其贡献大小是不同的,这对于确定不同轮作制的氮、磷、钾肥投入水平,具有参考价值。
By the grey classified analysis,the effect on fertilizing soil and conservating soil moisture of different planting models of triple crop rotation of wheat-corn-sweet potato models was cleared. The results showed that the model 1's effect in the fertilizing soil was the best, model 2' was better, model 4's was infcrioret, and model 3 was the inferiorest In the preservation of soil moisture, the model 1' effect was the best, model 3 was better, model 2 and model 4 was inferior. Through the grey related analysis, it is found that soil nutrientis contribution was not the same in different models.
出处
《西南农业学报》
CSCD
1993年第3期62-68,共7页
Southwest China Journal of Agricultural Sciences
关键词
灰色关联
小麦
玉米
红茹
间作
Wheat Corn Sweet potato Alternate culture system Grey classiffication Grey relation
