摘要
１０年轮作培肥试验结果表明：作物轮作中增加豆科类养地作物比例将明显地改善土壤养分状况，培肥土壤。豆科作物茬口的土壤养分状况优于小麦茬口，而且其茬口的培肥作用、累加效应显著。有机肥与氮磷配施（ＮＰＭ）在试验的几种轮作系统中都具有优越的培肥土壤作用。单施磷肥在豆科牧草苜蓿连作中同样有一定的培肥作用，而在卷入了非豆科作物的小麦－豌豆轮作系统中，则未表现出改善土壤养分的作用。
The 10 year experiment results of crop rotation improving soil fertility show as follows, the bean family brought into crop rotation might improve soil fertility obviously, soil fertility after bean harvesting was higher than after wheat harvesting, the accumulation effects of improving soil fertility after bean harvesting is obvious. Applying OM and NPM in crop rotation plots had a special role on improving soil fertility, however, applying P in continuous alfalfa rotation also had a similar role. But wheat pea rotation might not improve soil fertility.
