青海湖地区中度退化线叶嵩草型草地地下植物量的研究  

Studies on underground biomass of moderate degradation of Kobresia capillifolia grassland in Qinghai Lake area

作　　者：王小利 张力 张德罡[3] 干友民[4] 徐广平[3] 杨予海[5] 苗小林 周学辉 邓春辉 官却扎西[5] 

机构地区：[1]贵州草业研究所,贵州独山558200 [2]兰州畜牧兽药研究所,甘肃兰州730050 [3]甘肃农业大学,甘肃兰州730070 [4]四川农业大学,四川雅安625014 [5]青海省三角城种羊场,青海刚察812300

出　　处：《草原与草坪》2006年第1期24-27,共4页Grassland and Turf

基　　金：中国农业科学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：通过对青海湖地区中度退化嵩草型苹地地下植物量的研究，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为升高一降低的“单峰”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85．53％的植物量分布在0～20cm深的土层中；在地下0～40cm土层内，其根系的年净生产量及周转值分别为787．13g／m^2、26．08％；地下／地上植物量的值为24．61。In this paper, underground biomass of moderate degradation of Kobresia capillifolia grassland in Qinghai Lake area was studied. The result showed that seasonal tendency of underground biomass of moderate degradation of Kobresia capillifolia grassland was a single apex curve. At different growing stage, with the increasing of depth,underground biomass decreased,and 85.53% of biomass distributed at layer of 0-20 cm. At the layer of 0-40 cm,net production and turnover value of roots were 787.13 g/ms. a and 26.08% respectively, the ratio of underground biomass to aboveground biomass was 24.61.

关 键 词：膏海湖地区 线叶嵩草 地下植物量 

分 类 号：S812[农业科学—草业科学]