杉木林林下植被生物量影响因素

通过收集杉木林林下植被生物量数据,分析杉木林林下植被生物量与年平均温度、年降水量、林分年龄、林分密度、乔木层生物量、灌木层生物量、草本层生物量、枯枝落叶层现存量等8个因子的相关关系。结果表明,林下植被生物量与林龄、乔木层生物量、灌木层生物量、草本层生物量、枯枝落叶层现存量呈显著正相关,其中以与草本层生物量相关性最大,与林分密度呈负相关,而与年均温、年降水量无显著相关。多元线性回归分析表明,林龄、林分密度、草本生物量可解释枯枝落叶现存量变化的90.6%。

Analysis of influencing factors of undergrowth biomass in Cunninghamia lanceolata plantations

Through collecting the data of undergrowth biomass in Cunninghamia lanceolata plantations,the correlation analysis was carried out between undergrowth biomass in C.lanceolata plantations and 8 factors(annual average temperature,annual rainfall,plantation age,density,arbor biomass,shrub biomass,herb biomass,floor litter content).The result showed that the undergrowth biomass had significant positive correlation with plantation age,arbor biomass,shrub biomass,herb biomass and floor litter content,of which herb biomass is the most correlation.It was negative correlation with density,but no significant correlation with annual average temperature and annual rainfall.Using multi-factor linear regression,plantation age,herb biomass and density together could explain 90.6% of the variation in the undergrowth biomass of C.lanceolata.