安徽大学学报（自然科学版）2018，Vol.42Issue(3)：98-108,11.DOI:10.3969/j.issn.1000-2162.2018.03.017
青海河南高寒草地生态系统健康评价
Health assessment for alpine grassland ecosystem of Henan County in Qinghai Province
摘要
Abstract
The authors took alpine meadow of Henan County in Qinghai Province as the study area,through dividing the"vegetation state,soil conditions,interference condition and ecosystem values"as four aspects using 17 indicators.Ecosystem health evaluation system for alpine meadow was constructed and divided into target layer A,criterion layer B and factor layer C.Then AHP was used to determine the index weight.Finally,alpine grassland ecosystem health was determined based on comprehensive index evaluation method.The results showed:vegetation and soil conditions accounted for greater weights in criterion layer,which was 0.453 4 and 0.298 4,respectively.They occupied major positions in the ecosystem health evaluation system of the alpine meadow.In the factor layer,the weight of soil organic matter,aboveground biomass and vegetation cover was 0.168 2,0.164 9 and 0.164 9,respectively,having significant impact on the alpine meadow ecosystem health. Population density,soil carbon storage capacity and forage production had less impact on the meadow ecosystem health,the weight of which was 0.007 5,0.010 5 and 0.010 5, respectively.The evaluation results showed that the grassland ecosystem health of Henan County in Qinghai Province was preferences except plot 7.However,the scores of sample 3 and sample 5 were too low,having the trend of deterioration.Protective measures should be taken when grassland degradation is in the initial stage.关键词
草地生态系统健康评价/层次分析法/综合指数Key words
grassland ecosystem health evaluation/analytic hierarchy process/comprehensive index分类
农业科技引用本文复制引用
吴蓉蓉,史惠兰,王维,李江鹏,姚卫康,李希来..青海河南高寒草地生态系统健康评价[J].安徽大学学报（自然科学版）,2018,42(3):98-108,11.基金项目
青海省科技厅国际合作专项(2014-HZ-805) （2014-HZ-805）
教育部长江学者和创新团队发展计划(IRT13074) （IRT13074）
