高寒草甸草地水、土、草中氮硫含量冷暖季节的变化  

The contents of sulphur and nitrogen in water, soil and forage of alpine meadow during warm and cold season

作　　者：罗海玲[1] 黄有德[2] 张尤嘉[2] 张英俊[3] 颜生林 肖西山[5] 李成魁 王玲英[6] 王芳霞[1] 

机构地区：[1]甘肃农业大学动物生产工程系,甘肃兰州730070 [2]甘肃农业大学动物医学系,甘肃兰州730070 [3]甘肃农业大学草业工程系,甘肃兰州730070 [4]青海省海北州牧科所,青海海北州810300 [5]中国农科院兰州畜牧与兽药研究所,甘肃兰州730050 [6]甘肃农业大学中心实验室,甘肃兰州730070

出　　处：《草业科学》2001年第4期39-42,45,共5页Pratacultural Science

基　　金：甘肃省自然科学基金暨中青年科学基金资助 (ZR-97-0 4 78)

摘　　要：根据青海高原特殊的气候分布特征 ,把高寒草甸草地绵羊放牧地划分为冷季和暖季。通过测定冷暖季绵羊放牧地水、土壤、牧草中氮和硫含量的结果表明 :水、土壤、牧草中氮和硫的含量暖季 >冷季 (P<0 .0 5 ) ,其中地表水冷暖季含硫量分别为 3.7mg/ kg、5 .1mg/ kg,水中没有检测到氮 ;牧草中硫含量冷暖季分别为 2 95 2 mg/ kg、32 6 2 mg/ kg,差异显著 (P<0 .0 5 ) ;牧草中氮含量冷暖季分别为 0 .6 2 %、1.36 % ,差异显著 (P<0 .0 5 ) ;土壤氮含量冷暖季分别为0 .2 2 %、0 .2 85 % ,差异显著 (P<0 .0 5 ) ;硫含量冷暖季分别为 0 .2 4 %、0 .37%。Based on the climate of Qinghai Plateau, the sheep grazing g ra ssland was divided into cold-season and warm-season area. Sulphur and nitrogen content of the forage, water and soil in cold-season and warm-season area wer e determined respectively. The results showed that sulphur content of the forage and soil in cold-season area were significantly lower than those in warm-seas on area ( p <0.05), the nitrogen content of forage and soil in cold-season ar ea were significantly lower than those in warm-season area ( p <0.05), the su lphur content of the water in cold-season area was significantly lower than tha t in warm-season area ( p <0.05), respectively. However, no any nitrogen was found out in the water.

关 键 词：硫 氮 水 土壤 牧草 高寒草甸草地 含量变化 冷季 暖季 绵羊 放牧地 

分 类 号：S812[农业科学—草业科学]