祁连山东段土地利用方式对植被地上、地下植物量的影响  

Effects of different land use patterns on the aboveground and underground biomass of vegetation in eastern Qilian Mountains

作　　者：赵锦梅[1] 张德罡[1] 刘长仲[1] 徐长林[1] 

机构地区：[1]甘肃农业大学草业学院草业生态系统教育部重点实验室中-美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2010年第4期34-38,共5页Grassland and Turf

基　　金：全球环境基金(GEF)甘肃牧业发展应用研究项目(052456CHA-GS-J-3)资助

摘　　要：为了解祁连山东段天祝高寒地区不同土地利用方式对植被地上和地下植物量的影响,选取天然草地、退耕自然恢复地、当年弃耕地、坡耕地和多年生草地5种土地利用方式下的地上和地下植物量进行研究。结果表明,地上植物量表现为坡耕地〉多年生草地〉天然草地〉退耕自然恢复地〉当年弃耕地;地下植物量表现为天然草地〉多年生草地〉坡耕地〉退耕自然恢复地〉当年弃耕地;地下植物量分布在0~10 cm土层;地上植物量与植被盖度之间的关系拟合二次函数,地下植物量与植被盖度、物种数之间的关系分别拟合对数和二次函数;地上植物量与地表的植被盖度显著相关（P〈0.05）;地下植物量与地表的植被盖度和物种数显著相关（P〈0.05）。The impacts of different land use patterns on the aboveground and underground biomass of alpine meadow in the eastern part of Qilian Mountains were studied.The five land use patterns,including natural grassland,returned farmland to naturally restorated grassland,slope farmland,abandoned cropland and sowed perennial grassland,were designed.The results showed there were significant differences in aboveground and underground biomass among 5 land use patterns.The order of aboveground biomass was slope farmlandsowed perennial grasslandnatural grasslandreturned farmland to naturally restorated grasslandabandoned cropland;The order of underground biomass was natural grasslandsowed perennial grasslandslope farmlandreturned farmland to naturally restorated grasslandabandoned cropland;Underground biomass moss mainly distributed within 0 to 10 cm soil layer.The relationship between aboveground biomass and vegetation coverage could be discribed as a quadratic function.The relationship between underground biomass and vegetation coverage could be discribed as a logarithmic function.The relationship between underground biomass and species number could be discribed as a quadratic function.The aboveground biomass was significantly（P0.05）correlated with vegetation coverage.The underground biomass was significantly（P0.05）respectively correlated with species and vegetation coverage.

关 键 词：祁连山东段 土地利用 植物量 

分 类 号：S812.8[农业科学—草业科学]