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水旱轮作能使土壤有机质、全氮与全磷含量增加,提高土壤肥力。通过对水旱轮作水稻、玉米研究发现:轮作区田块在夏作成熟期细菌数量均高于连作,而真菌与放线菌数量低于连作。而针对水稻、棉花水旱轮作的研究未见报道,因此,本文从土壤生物活性角度研究水旱轮作,以期为解决棉田连作障碍,
The rotation and rotation of soil and water can increase the contents of soil organic matter, total nitrogen and total phosphorus and soil fertility. The results of paddy and maize rotation showed that the number of bacteria in the rotation cropping plots was higher than that in continuous cropping and the fungi and actinomycetes were lower than that in continuous cropping. However, no research has been done on the crop rotation and development of paddy and cotton. Therefore, this paper studies the crop rotation and drought cropping from the perspective of soil biological activity,