【摘要】 <正> 青海海北高寒草甸生态系统定位站是世界上海拔最高的定位站,代表了青藏高原高寒草甸土壤的主要类型,也是青海省畜牧业的主要基地。在该区曾发现牲畜的白肌病。为此我们对本地区土壤中的硒含量进行了研究。这对草场改良,生态系统中的硒平衡及提高畜牧业生产和环境评价都有一定理论和实际意义。更多还原

【Abstract】 The soil contents of total and water-soluble Se in Haibei alpine meadow of Qinghai province were investigated. The total Se contents in four types of soils range from 0.069 to 1.624 mg/kg with an average of 0.288 mg/kg. The profile-weighted average contents of Se for bog soil, alpine scrubby meadow soil, carbonate apline meadow soil and gray cin-namonic soil are 0.812, 0.253, 0.180 and 0.154 mg/kg respectively. The Se contents decrease gradually downward along profile of all four types of soils. The mean value of water-soluble Se is 1.84 μg/kg with a range of 1.25 to 3.43 μg/kg.更多还原