连作与轮作大生各生育期土壤微生物生态分布和大豆孢囊线虫群体动态的研究结果表明,无论上壤微生物总数或大豆根表微生物总数的动态变化,均以细菌数量占绝对优势,其次是放线菌。真菌最少。根表微生物总数大于土壤微生物总数的几十倍到100多倍。大豆各生育期微生物总数以开花期为最多,其次是成熟期.再次是分枝期。根瘤密度和大豆孢囊密度以成熟期为最大,其次是开花期,分枝期最小。微生物总数和根瘤密度,轮作区高于连作区。孢囊密度则相反,连作区高于轮作区。值得注意的是,真菌数量动态变化与孢囊密度动态变化是一致的.其次序是分枝期<开花期<成熟期。这种吻合可能有着内在的联系,有待进一步研究。 The results of ecological distribution of soil microbes and population dynamics of soybean cyst nematode in continuous cropping and rotating crop showed that the number of bacteria accounted for the absolute predominance regardless of the total number of soil microorganisms or the total number of microorganisms in soybean root surface, bacteria. Fungus at least. The total number of root surface microorganisms is greater than the total number of soil microorganisms several times to 100 times. The total number of microorganisms in each growth stage of soybean was the most in flowering stage, followed by the mature stage. The root nodule density and soybean cyst density were the highest in maturity stage, followed by the flowering stage and the smallest branching stage. The total number of microorganisms and nodule density, crop rotation area higher than the continuous cropping area. Conversely, the cyst density is higher than that of the rotation area. It is noteworthy that the dynamic changes of the number of fungi and cyst density are consistent, the order of the branching period