放牧对天山北坡草甸土壤水分和容重的影响

研究了2004年天山北坡乌鲁木齐段中山带山地草甸围栏内非放牧草地和围栏外自由放牧草地生长期至完全枯黄期0～30cm及越冬后0～50cm的土壤水分和土壤容重。结果表明,在0～30cm土壤深度范围,降水较少时围栏内外各深度层的土壤水分变化不太明显,当降水较大时,围栏内水分含量明显大于围栏外;围栏内各深度层土壤容重无论在植物生长期还是冬季休眠期都大于围栏外;越冬后围栏内各深度层的水分明显大于围栏外;在30～50cm深度范围,围栏内、外的土壤水分和容重变化较小;放牧对土壤水分和容重的影响主要集中在0～30cm深度,而对30cm深度以下影响程度较小。

Effects of Graze on Soil Moisture and Weight of Meadow in the North Slope of Tianshan Mountain

This paper studied the soil moisture and weight of non-grazing land inside the fence and free grazing land outside the fence of the meadow with the depth of 0-30 cm from growth period to period of wilt and 0-50 cm after overwintering in the mid-mountain zone of Urumqi part of north slope of Tianshan Mountain from 2004.Results showed that in 0-30 cm depth of soil,soil moisture in each depth level inside and outside the fence varied slightly with low rainfall while soil moisture inside the fence was larger wi...