Study On Community Characteristics Of Plants In Returning Farmland To Grassland In Farming Pastoral Ecotone

Using the sample line method.The plant community in the area of returning farmland to grassland in the farming-pastoral ecotone of Siziwang Banner,Inner Mongolia,was investigated.Includes Four different soil types:chestnut soil,brown calcic soil,gray-drab soil and meadow soil.And three different terrains of chestnut soil:flat land of the hills,sloping land of the hills and highland of the hills.The plant community structure;flora composition,plant water ecology type,species a diversity and community stability after returning farmland to grassland were mainly discussed.By comparing the vegetation characteristics of the site 11 years ago,this paper analyzes the restoration status of vegetation in the area of returning farmland to grassland in the farming-pastoral ecotone of Siziwang Banner,Inner Mongolia.The results show:After returning farmland to grass,the number of plants on the sloping land of the hills is the highest.Its two plots have 19 species and 22 species,respectively.Flat land of the hills,sloping land of the hills and highland of the hills are mainly perennial herbaceous plants.The perennial herbaceous plants in the six plots of the three terrains accounted for 67%,67%,74%,73%,67%,and 57%of all plants in each plot,respectively.There are many typical xerophytes in the area(53.3%?47.1%?52.6%?54.5%?66.7%?35.7%).The plant diversity of the highland of the hills is significantly lower than flat land of the hills,sloping land of the hills.But its plant community has the highest stability.Among the four soil types,there are 17 species of chestnut soil plants.brown calcic soil shrubs are more than 36%of all plants;There are more than one-year-old herbaceous plants in meadow soil,accounting for 46%,and mainly in dry medium plant(46%);Other soils are mainly perennial herbaceous plants(65%,57%,82%).More typical xerophytes(65%,64%,73%).The plant diversity of chestnut soil was the highest,and the coordinates of the stability of brown calcic soil plant community were 32/68,which was higher than the other three soil types.