退化草地不同功能群生物量与土壤养分的相关性分析

The Correlation Analysis between Biomass of Different Functional Groups and Soil Nutrients in Degraded Grassland

选择未退化、轻度退化、中度退化、重度退化和极重度退化草地上的莎草科、禾本科、杂类草生物量为研究对象,对不同功能群生物量与土壤养分的相关性进行研究。结果表明,土壤全氮、全钾含量对各功能群的生物量影响较大,均呈正相关关系,且达到0.01或0.05显著水平;土壤全磷含量对各功能群生物量的影响不明显;pH对各功能群生物量的影响较大,呈负相关关系,且达到0.01显著水平。

The biomass of Cyperaceae,Gramineae,weeds in the undegraded,lightly degraded,mildly degraded,severely degraded and extremely degraded meadow is chosen as the research object,to study the corrclation between biomass of different functional groups and soil nutrients.The results show that the influence of soil total nitrogen,total potassium content on biomass of different functional groups is obvious,exhibiting positive correlation,and reaching significant or extremely significant level; the influence of soil total phosphorus content on biomass of different functional groups is not obvious ; the influence of pH value on biomass of different functional groups is obvious,exhibiting negative correlation,and reaching extremely significant level.