摘要
探讨了松嫩平原草原植物群落演替与土壤化学性质和土壤肥力的关系。结果表明:不同演替群落阶段,其土壤的化学性质和肥力存在一定差异,由于土壤化学性质不同,使群落镶嵌分布,组成植被的复合体。随着植被的退化演替,群落的盖度、高度下降,种类组成趋于简单化,生物量减少,土壤盐碱化程度加重,土壤肥力下降,出现次生盐碱植物群落。群落的生物量与土壤值、含盐量、碱化度呈负相关,与土壤腐殖质和全氮含量呈正相关。
The relationship between different plant communities and soil characteristics were studied in the Songnen grassland. The results showed that soil chemical properties and fertility varied greatly in different plant community succession stages. Owing to the difference of soil chemical property, the mosaic distribution of plant communities composed the compound style of vegetation. The coverage, height and biomass of the communities were decreased, species composition tended to simplify, the salinealkaline degree became heavier, soil fertility dropped and secondary salinealkaline plant communities arose with degenerative succession of vegetation. The correlation between community biomass and soil pH, salt content, alkaline degree was negative, and soil humus, total N content was positive.
出处
《草业学报》
CSCD
2003年第1期18-22,共5页
Acta Prataculturae Sinica
基金
国家重点基础研究发展规划项目(G2000018606)
国家自然科学基金项目(30170668)
高等学校骨干教师资助计划项目。
