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为揭示季节性轮牧对土壤养分的影响,利用内蒙古阿巴嘎旗北部娜仁宝力格苏木4种季节轮牧草场的89个样品的化验结果,进行统计分析,采用对比法和主成分分析法研究了季节性轮牧对土壤有机质、氮素、磷素、钾素的影响。结果表明:锡林郭勒典型草原季节性轮牧对土壤养分含量影响显著。土壤养分综合状况表现为:冬季草场>春季草场>秋季草场>全禁牧草场>夏季草场;在0-15cm土层,各轮牧季节草场随着土层深度的增加,土壤有机质、氮素、磷素、钾素含量有逐渐减少的规律。季节性轮牧是合理的放牧管理方式,与禁牧相比,冬季与春季轮牧对土壤养分影响最小,夏季则最大。因此,降低夏季牧场的放牧强度有利于保持土壤养分,实现草场的可持续利用。
In order to reveal the effect of seasonal rotation of grazing on soil nutrients, 89 samples from 89 species of Naren Baoligemu pasture in the northern part of Abaga Banner of Inner Mongolia were analyzed for statistical analysis. By contrast method and principal component analysis The effects of seasonal grazing on soil organic matter, nitrogen, phosphorus and potassium were studied. The results showed that the seasonal rotation of grazing in Xilin Gol grassland had a significant effect on soil nutrient content. The comprehensive status of soil nutrients was as follows: winter pasture> spring pasture> autumn pasture> all-forbidden pasture> summer pasture; in 0-15cm soil layer, pasture pasture in each rotation increased with depth of soil layer, soil organic matter, nitrogen, Vegetarian, potassium content has gradually reduced the law. Seasonal rotation of grazing is a reasonable way of grazing management. Compared with grazing grazing, winter grazing and spring grazing have the least effect on soil nutrients and summer grazing is the largest. Therefore, reducing the grazing intensity of summer pastures helps maintain soil nutrients and achieve sustainable use of grasslands.