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研究了短花针茅草原不同季节、不同放牧梯度内土壤微生物数量、土壤养分的变化及土壤微生物与土壤养分之间的相关性,结果表明:轻度放牧区(LG)和重度放牧区(HG)内土壤微生物数量春季最高,土壤微生物数量(0-10 cm)在三个放牧区内随着季节的变化均呈下降趋势。而在10-20 cm,对照区内土壤微生物数量的高峰期出现在夏季然后开始下降,轻度放牧区和重度放牧区土壤微生物随着季节的变化而下降。土壤微生物数量到了秋季在三个放牧梯度内均呈现显著性的差异,土壤养分也是在秋季出现了显著性差异(P<0.05)。土壤微生物总数在不同放牧梯度内的变化规律是对照和轻度放牧区均大于重度放牧区。土壤微生物与土壤有机质和土壤全氮呈较强的正相关。
The relationship between soil microorganisms and soil nutrients in different grazing stages of Stipa breviflora and different grazing gradients, and the relationship between soil microbe and soil nutrients were studied. The results showed that there was a significant correlation between soil microbe and soil nutrient in the light grazing area (LG) and heavy grazing area ) Was the highest in spring. The number of soil microorganisms (0-10 cm) showed a decreasing trend with the change of seasons in the three grazing areas. At 10-20 cm, the peak number of soil microbes in the control area appeared in summer and then began to decline. The soil microorganisms in mild grazing area and severe grazing area decreased with the seasons. The number of soil microbes showed significant difference in three grazing gradients in autumn, and soil nutrients also showed significant difference in autumn (P <0.05). The change law of the total amount of soil microorganisms in different grazing gradients was greater in the control and mild grazing areas than in the grazing areas. Soil microorganisms showed a strong positive correlation with soil organic matter and soil total nitrogen.