Species diversity of the endangered plant Gymnocarpos przewalskii community and its correlation with soil characteristics
[Objective]To explore the species diversity of the Gymnocarpos przewalskii community and its rela-tionship with soil factors,providing a scientificbasisfor the protection of endangered plant G. przewalskii community.[Method]Field investigationswere conducted on the G. Przewalskii community atthe western end of the Qilian Mountains. Species composition,species diversity,and the correlation between species diversity and soilfactors were analyzed.[Result]G. przewalskii communityhas a simple composition structureand low species diversity,with a total of 25 species,22 genera and 12 families recorded. Mostspecies are sub-shrubs and perennial herbs fromfamilies As-teraceae (6 species),Chenopodiaceae (6 species) and Poaceae (3 species).The soil in thiscommunity was low in nu-trients (2.64％) andstrongly alkaline (pH=8.99,total salt=2.75 g/kg). The average contents of organic carbon,total nitrogen and total phosphorus were 1.34,0.15 and 0.29 g/kg,respectively. The average contents of available nitrogen,available phosphorus and available potassium were 13.67,3.54 and 70.03 mg/kg,respectively. Significant differences in soil nutrient contentswere observed among different G. przewalskii communities (P<0.05). The Piel-ouindex of the G. Przewalskii community was significantly positively correlated with soil content and available nitro-gen.[Conclusion]The plantdiversity levelof G. przewalskii communityatthe western end of Qilian Mountain islow,and the community structure issimple. The soil water and nutrient conditionsare poor,and the Pielouindexis signifi-cantly positively correlated with soil water content and available nitrogen.
万方数据
维普
