Vegetation Succession Process and Comprehensive Management Suggestions in Rocky Desertification Areas of Kaiyuan City
This paper analyzes the vegetation succession process in rocky desertification area of Kaiyuan City,and determines the comprehensive treatment measures based on the investigation results.Three samples were selected as Z1(mild rocky desertification),Z2(moderate rocky desertification)and Z3(severe rocky desertification)in the rocky desertification area of Kaiyuan City,and the vegetation communities in different areas were investigated.In Z1 plot,30 trees were investigated.The main species of Cyclobalanopsis yunnanensis,Pistacia weinmannifolia J.Poisson ex Franch.,Olea yuennanensis,Toxicodendron delavayi,and Dichotomanthes tristaniicarpa Kurz.The highest important value of Cyclobalanopsis Yunnanensis was 1.29.The tree species are distributed in all diameter classes,mainly in small scale vegetation,and the community structure of primary forest is relatively coordinated,and it is in a stable growth stage.A total of 25 trees were investigated in Z2 sample,which were composed of Dal-bergia yunnanensis Franch.,Ulmus kunmingensis Cheng,Pistacia chinensis Bunge and Rhamnella martinii(Levl.)Schneid.In the Z2 plot,the dominant species were not obvious in medium diameter class.The proportion of small diameter class was too large,and the community structure was relatively simple.Z3 investigated 3 trees;there was no shrub,only Pinus yunnanensisand Solanum deflexicarpum.The community species and community structure were single;vegetation of each diameter class was missing;the degree of stony desertification was high,and vege-tation degradation was obvious.In the mild rocky desertification area of Kaiyuan City,the original vegetation community is complex,with strong drought and disaster resistance.In the medium and severe rocky desertification area,the vegetation structure is relatively simple,and the degradation is more serious.For different types of rocky desertification areas,targeted vegetation restoration should be carried out through artificial forestation,construc-tion of forest protection team,and development of circular ecological economy.In practice,it is necessary to focus on key points,take a multi-pronged approach to governance,and implement various governance contents.
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万方数据
维普
