黄土丘陵沟壑区植被恢复过程中物种组成及多样性  

Plant diversity and species composition on the process of vegetation restoration in semiarid loss hilly and gully at Gansu areas

作　　者：莫保儒 蔡国军 赵廷宁[2] 于洪波 邹天福 柴春山 王子婷 

机构地区：[1]甘肃林业科学研究院,甘肃兰州730020 [2]北京林业大学,北京100083

出　　处：《草业科学》2010年第2期48-53,共6页Pratacultural Science

基　　金：国家"十一五"科技攻关课题"黄土丘陵沟壑区生态综合整治技术开发"(2006BAC01A06);国家"十一五"国家科技支撑计划林业项目专题"黄土高原丘陵沟壑半干旱区水土保持抗旱造林及径流林业技术试验示范"(2006BAD03A1201)

摘　　要：通过小流域内不同生境条件下的植被调查,研究了半干旱黄土丘陵沟壑区植被恢复过程中的物种组成和植物多样性。结果表明:各植物种占总数比例为多年生草本>一年生草本>灌木>乔木;阳坡灌木作用较大,半阳坡和半阴坡乔木树种与灌木树种作用相近,阴坡明显以乔木树种作用占优势;不同人工林类型之间植物多样性不存在显著差异,而立地条件是影响植物多样性的主要因素,人们对退耕地的经营活动,不利于生物多样性恢复。Species composition and plant diversity within watershed were investigated at different habi- tat in semiarid loess hilly region during the process of vegetation restoration. The results show that the proportion of species to the total plant is as follow： perennial herbage〉annual herbage〉shrub〉 tree. The importance of different plants in ecological function were shrub in sunny slope, trees and shrubs in half-shaded and half-sunny slope, and trees in shaded slope. No significant differences were found in the biodiversity between different artificial forests. The environmental condition in the study site is the key factor for biodiversity, and people＇s production activities are a negative factor for restoration of biodiversity.

关 键 词：半干旱黄土丘陵沟壑区 生活型 生物多样性 

分 类 号：Q948.15[生物学—植物学]