In order to reveal the effects of different winter crops on soil aggregate structure,organic carbon and total nitrogen in double rice field,this study investigated the aggregate structure and organic carbon and to-tal nitrogen content of the soil by using the dry sieving and wet sieving methods with four different winter crops. The results showed that planting milk vetch,rape and garlic in paddy field were beneficial to the conformation of soil macro-aggregates.The content of>0.25 mm water-stable aggregates in the soil under garlic in winter was the highest.The content of 2 mm and 2 mm and 0.25-0.5 mm aggregates.Gen-erally speaking,planting winter crops in double rice field is beneficial to improving soil aggregate structure and carbon and nitrogen contents,which is beneficial to the sustainable development of paddy soil.%为揭示不同冬作物对双季稻田土壤团聚体结构及有机碳、全氮的影响,本研究以4种不同冬作模式为研究对象,采用干筛和湿筛方法研究了土壤团聚体结构及其有机碳、全氮含量.研究结果表明:双季稻田冬季种植紫云英、油菜、大蒜有利于大团聚体的形成.冬种大蒜对提高土壤>0.25 mm水稳性团聚体含量效果最好,冬种紫云英的土壤粒径2 mm和2 mm和0.25~0.5 mm团聚体的全氮含量.总的来说,双季稻田种植冬季作物有利于改善土壤团聚体结构和碳氮含量,有利于维持稻田土壤的可持续发展.
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