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苜蓿-作物轮作可提高后茬作物的产量与品质,其作用受作物种类与种植年限、苜蓿地耕作方式及耕作时间、苜蓿品种与种植年限、作物对土壤中苜蓿-N利用率及施肥水平的影响。苜蓿-作物轮作可改善农田生态环境,提高土壤N素、有机质含量和水稳性团粒结构,降低土壤容重。苜蓿通过生物脱盐和大量吸水可降低地下水位,改良盐渍化土壤,减少地表径流量和土壤冲刷量,减轻农作物病虫草害。
Alfalfa crop rotation can improve crop yield and quality after stubble. Its function is influenced by crop type and planting period, alfalfa cultivation methods and tillage time, alfalfa variety and planting time, crop utilization of alfalfa N and soil fertility influences. Alfalfa - crop rotation can improve farmland ecological environment, improve soil N, organic matter content and water stable aggregate structure, reduce soil bulk density. Alfalfa through biological desalination and a large number of water absorption can reduce the water table, salinization of soil improvement, reduce surface runoff and soil erosion, reduce crop pests and diseases.