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从经济效益、土壤肥力方面研究了5种作物组合的轮作效应。经济效应最佳者是小麦—棉花组合。毛苕—棉花组合、油菜—棉花组合和小麦—柽麻组合都在不同程度上提高了土壤肥力,也保持了一定的产量水平。最优作物组合轮作顺序是:小麦玉米→油菜棉花→小麦棉花→毛苕棉花→(小麦柽麻)→小麦棉花。
The crop rotation effects of five crop combinations were studied in terms of economic benefits and soil fertility. The best economic effect is the wheat-cotton combination. Mud - cotton combination, rape-cotton combination and wheat-hemp combination improved soil fertility to some extent and maintained a certain level of yield. The order of the best crop rotation is: wheat and corn → rapeseed cotton → wheat cotton → cotton wool → (cotton flax) → wheat cotton.