环湖草原重度退化线叶嵩草型草地一年内地下植物量变化研究  

Study on Underground Phytomass of Heavily Degraded Kobresia capillifolia Grassland in Qinghai Lake Area

作　　者：王小利 干友民[2] 张力 杨予海[4] 

机构地区：[1]贵州草业研究所,贵州独山558200 [2]四川农业大学,四川雅安625014 [3]兰州畜牧兽药研究所,甘肃兰州730050 [4]青海省三角城种羊场,青海刚察812300

出　　处：《四川草原》2006年第6期6-9,共4页Journal of Sichuan Grassland

基　　金：中国农科院兰州畜牧与兽药研究所课题;青藏高原生态畜牧业试验与示范

摘　　要：本研究以青海湖地区重度退化线叶嵩草型草地为研究对象,采用土柱法测定地下植物量一年内的季节变化动态。研究结果显示:线叶嵩草型中度退化样地地下植物量季节变化动态呈“V”字形曲线;在牧草生长季的不同时期,随着土壤深度的增加,地下植物量的分布呈明显递减趋势,地下86.65%的植物量分布在0￣20cm深的土层中,在地下0￣40cm土层内,其根系的净生产量及周转值分别为1 190.6g/m.2a、51.33%;地下/地上植物量的值为27.22。Kobresia capillifolia grassland was used as material to study underground phytomass with earth pillar method. The results showed that season dynamic of underground phytomass of heavily degraded Kobresia capillifolia grassland took on ＂V＂ curve, the distribution of underground phytomass was decreasing with increasing of soil depth at different growing period, 86.65% of underground phytomass have distributed at soil layer of 0-20 cm.At soil layer of 0-40cm, the net yield and turnover value of underground phytomasss was 1190.6 g/m^2.a, 51.33% respectively, the value of underground/aboveground phytomass was 27.22.

关 键 词：青海湖地区 线叶嵩草 地下植物量 

分 类 号：S812[农业科学—草业科学]