Abstract：[Background] In order to quantitatively analyze the ecological function of the de-farming vegetation in the Loess Alpine Region of Qinghai, the optimal measures for the vegetation in this region were discussed. [Methods] In this paper, the frequency analysis method and expert scoring method were used to construct the evaluation system of vegetation ecological function index. The comprehensive evaluation of vegetation ecological function was carried out by using analytic hierarchy process method, the vegetation health status and degradation reasons were analyzed, and the vegetation optimization measures were proposed. [Results] 1) The mixed forest of Picea crassifolia, Populus cathayana and Larix principis-rupprechii on the middle altitude and gentle shady slope had the highest comprehensive score of 0.637 2; the mixed forest of P. crassifolia and P. cathayana on the low altitude and gentle sunny slope had the lowest comprehensive score of 0.189 8. 2) Among the 68 kinds of de-farming vegetations in the study area, 7 kinds of shade slope vegetations were healthy, 8 kinds of sunny slope vegetations and total 18 kinds of shade slope vegetation were sub-healthy, and 13 kinds of sunny slope vegetations and total 22 kinds of shade slope vegetations were unhealthy level. 3) The vegetations on the sunny slope had problems of slow growth, high stand density and single structure; and the main dominant species were Sabina przewalskii, Pinus tabuliformis, Caragana korshinskii and Armeniaca sibirica. The shady slope was in problems such as high stand density, simple structure and pests diseases; and the main dominant species were P. crassifolia, Betula platyphylla, L. principis-rupprechii, P. cathayana and Hippophae rhamnoides. [Conclusions] The results of this study showed that about half of the de-farming vegetation was in poor ecological function and in an unhealthy state. It is suggested that thinning should be done in vegetation types with high stand density, also thinning vegetation types with diseases and insect pests and replanting dominant species to realize gradual replacement, and the vegetation types with single stand structure should be replanted with other dominant species to enrich the stand structure.
刘若莎, 王冬梅, 杨海龙, 贺康宁, 张雪, 温文杰. 青海黄土高寒区植被生态功能评价及优化措施[J]. 中国水土保持科学, 2021, 19(1): 97-105.
LIU Ruosha, WANG Dongmei, YANG Hailong, HE Kangning, ZHANG Xue, WEN Wenjie. Vegetation ecological function evaluation and optimization measures in the Loess Alpine Region of Qinghai. SSWC, 2021, 19(1): 97-105.
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2021, Vol. 19 
