辽宁沙化区域植被类型及土壤特征OA

[Objective]To study the vegetation types and soil characteristics in the areas affected by desertification in the northwest of Liaon-ing Province.[Method]A survey was conducted on the vegetation of desertified land in Liaoning Province,revealing the diversity of vegetation types and herbaceous plants in different types.The physical and chemical indicators of the soil where the community was located were ana-lyzed,and the restoration ability of different types of artificial forests on desertified land and the ecological restoration effect of protective forest construction were evaluated.[Result]According to Chinese Vegetation,the surveyed communities were classified into 3 vegetations,5 vegeta-tion formations,13 alliances and 27 associations,including evergreen needleleaf forest(hereinafter referred to as needleleaf forest),deciduous broadleaf forest(hereinafter referred to as broadleaf forest),needleleaf and broadleaf mixed forest(hereinafter referred to as mixed forest),deciduous needleleaf shrubland(hereinafter referred to as shrubland)and tussock grassland(hereinafter referred to as grassland).Shannon-Wiener index and Simpson index of herbaceous layer of different vegetation types were ordered as needleleaf forest<broadleaf forest<mixed forest<grassland<shrubland.The soil water content of broadleavf forest was significantly higher than that of other vegetation formations,the total nitrogen,total phosphorus and organic matter of grassland were significantly higher than those of mixed forest,and the coarse sand content of mixed forest was significantly higher than that of other vegetation formations(P<0.05).RDA analysis showed that soil pH,fine silt content and available phosphorus content were the factors with high correlation with herbaceous species diversity in Liaoning desertification area.