| Gravity erosion in the process of controlling soil erosion is an urgent problem t o be solved.Plants have an irreplaceable role in the treatment of gravity erosion.In this study,the plant community structure of different slopes,slopes and slopes in gra vity erosion environment was investigated.According to the flora and community cha racteristics,the distribution of existing plant communities in this area was studied.Th e main results are as follows:(1)A total of 61 family,52 genera and 61 species of plants were recorded in the survey.They were composed of Compositae,Leguminosae,Gramineae,Oleaceae,and Rosaceae,with a total of 51.9%,59%;The most widespread plant growth type is perennial herb,accounting for 45.9%of the total surveyed species.According to the water ecological type,it is mainly composed of middle,dry,middle and dry,and middle-aged plants,accounting for the actual survey species.93.4%.The plant com munities surveyed were divided into 16 cluster types,and the dominant populations o f trees were mainly distributed in the area of the sloping slope.Shrubs,semi-shrubs and herbaceous clusters were distributed in various erosion environments.(2)Analysis of species diversity index,species number,richness and evenness under different site conditions,the results are all represented by shady hilly slop>sun ny hilly slop>shady edge slop>sunny edge slop.This indicates that the species richne ss and diversity of the shady slope area are relatively high,so the shady edge slop community is more stable.Due to soil drought in the slope area of shady hilly slop,the species of this community is single,,but the dominant species are more obvious,so the species diversity and richness uniformity in the community are relatively low.(3)There are up to 17 species of clustered plants;13 species of main rod pla nts;12 species of sparse clusters;7 species of clusters;3 species of erect plants;2 s pecies of short stem plants;There are 2 kinds;there are 2 kinds of branches and bo ws.(4)The changes of above ground biomass and coverage of vegetation commun ities under different gravity erosion environments were significantly different(p<0.05).The main performances are shady hilly slop>sunny hilly slop>shady edge slop>sunn y edge slop,soil moisture content is not significantly different from the succession st age(p>0.05),and the change of bulk density and succession stage is significant.Diff erence(p<0.05).(5)Based on the analysis of different cluster diversity,it was found that the S hannon-wiener diversity index was between 1.71-2.77,the species number was betwee n 9-24,the Pielou evenness index was between 0.91-0.58,and the Margalef richness index was between 1.83-4.87.between.The above ground biomass is between 21.3-1345.7 g/m~2 and the coverage is between 12-73%.The soil moisture content is betwee n 5.8-10.1%,and the soil bulk density is between 1.07-1.44g/cm~3.Based on the abov e-mentioned indicators,the vegetation adaptability of gravity-eroded areas was evaluat ed.The Shady hilly slope Ziziphus jujuba-Bothriochloa ischaemum+Patrinia heteroph ylla cluster,Hippophae rhamnoides-Caragana korshinskii-Artemisia gmelinii cluste,Lesp edeza davurica+Bothriochloa ischaemum cluste,Platycladus orientalis-Rosa xanthina-Patrinia heterophylla cluster Platycladus orientalis-Rosa xanthina Lindl-Patrinia hetero phylla Bungecluste Lespedeza davurica+Bothriochloa ischaemum cluste Patrinia heter ophylla-Patrinia heterophylla cluste,and the Hippophae rhamnoides+Caragana korshi nskii-Artemisia gmelinii cluster.Rosa xanthina-Bothriochloa ischaemum+Artemisia gm elinii cluster has good Corrosion reduction ability;0-10cm soil layer,the soil weight of the Bothriochloa ischaemum cluster is the highest,and the water content is the lo west.The Periploca sepium-Artemisia gmelinii+Artemisia capillaris Thunb clusteris lo west weight,Followed by Lespedeza davurica+Bothriochloa ischaemum cluster Querc us wutaishansea-Syringa oblata-Carex lanceolata Boott cluster was the soil moisture i s the highest. |
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