典型草原定居牧户放牧对土壤有机质的影响

Effects of Grazing on The Soil Organic Matter in Typical Steppe Settled Herdsmen

通过野外考察,典型牧户采样及室内试验,研究了内蒙古阿巴嘎典型草原定居牧户放牧对土壤有机质的影响。结果表明:2个牧户相同土层之间土壤有机质对比,土层0～10cm,10～20cm土壤有机质含量达极显著差异水平(P<0.01),土层20～30cm土壤有机质含量达显著差异水平(P<0.05)。冬、夏季草场土壤有机质含量垂直方向土层之间达显著差异水平,随土壤深度增加而降低。土壤有机质变异系数介于0.088～0.291,属于中等或弱变异。冬季草场的土壤有机质含量普遍高于夏季草场的。

Through field investigation,sampling and laboratory experiments,the effects of grazing on the soil organic matter in the typical steppe of Abaga banner in Inner Mongolia were studied.The results showed that there were significant differences in soil organic matter between the two soil layers in the same soil layer,and the soil organic matter content in the soil layer was 0~10cm,10~20cm (P<0.01),and the soil organic matter content in the soil layer was significantly different (20~30cm).P<0.05).There is a significant difference between the soil organic matter content in the vertical and winter grassland in the winter and summer grassland,which decreases with the increase of soil depth.The coefficient of variation of soil organic matter is between 0.088 and 0.291,which is moderate or weak. The soil organic matter content in winter grassland is generally higher than that in summer grassland.