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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (26): 25-29.

• 畜牧 动物医学 蚕 蜂 • 上一篇    下一篇

放牧对草地土壤含水量与容重及地下生物量的影响

万里强   

  • 收稿日期:2011-04-25 修回日期:2011-05-13 出版日期:2011-10-15 发布日期:2011-10-15
  • 基金资助:

    国家公益性行业科研项目

Effects of Grazing on Soil Moisture and Bulk and Underground Biomass

  • Received:2011-04-25 Revised:2011-05-13 Online:2011-10-15 Published:2011-10-15

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摘要：

摘要：对滇东北人工草地不同放牧压下土壤含水量、土壤容重和地下生物量的变化进行研究，结果表明：（1）放牧利用对主要影响表层（0-5cm）土壤含水量和土壤容重，表层土壤含水量随着放牧压的增大而减小，土壤容重则以GPI0.76最大，GPI0.57下土壤容重随放牧时间波动较小，说明适度的放牧利用有利于稳定土壤结构；（2）草地植被地下生物量主要分布在0-10cm土层，占0-30cm土层的64-74%，地下生物量随放牧压增加而减少。

关键词: 葱乙醇提取物, 葱乙醇提取物, 小鼠, 环磷酰胺, 特异性免疫, 非特异性免疫

Abstract:

Abstract: Studied on change of soil moisture, soil bulk and underground biomass under different grazing press in southeast of Yunnan. The results indicate: (1)Grazing affected on soil moisture and soil bulk of the top soil(0-5cm), the soil moisture of surface decreased as grazing pressure increased, soil bulk density, soil bulk was maximum under GPI0.76 and soil bulk was less volature under GPI0.57, this showed that moderate grazing be advantageous to stable soil structure; (2)Underground biomass of grassland vegetation mainly in 0-10cm soil, accounting for 0-30cm soil layer of 64-74%, underground biomass decreased as grazing press increased.

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