Soil Microbial Community Characteristics of 5 Tree Species in Eucalyptus urophylla Plantation
Understory plays crucial roles in driving the ecosystem processes and functions. For the management of plantation, suitable understory may not only increase the capacity of carbon sequestration, but also can maintain soil fertility and improve the economic benefits, which would contribute to the sustainable development. Therefore, a study was conducted on the main understory species in an Eucalyptus urophylla (six years old) plantation in Heshan National Field Research Station of Forest Ecosystem. Five naturally generated understory species (i.e.,Gardenia jasminoides,Ilex asprella,Litsea cubeba,Rhodomyrtus tomentosa, and Common Melastoma) were chosen and the roots of other plants were excluded by trenching. The soil physical-chemical properties and microbial community composition were analyzed. Also the richness index (SR), diversity index (H′) and evenness index (J) were calculated to evaluate the diversity of soil microbial biomarkers for the five understory species. No significant differences of the soil pH, soil water content and soil organic carbon were found between trenching and control plots in both dry and rainy season. Furthermore, the total soil microbial biomass (PLFAs) did not differ in the trenching plots compared with those in the control plots. Although soil microbial community composition varies with different understory species, both the PCA analysis and diversity indices of the soil microbial biomarkers showed that there was no significant difference between the trenching and control plots. Our result indicated that these five understory species in Eucalyptus plantation did not affect soil properties; therefore, the aboveground biomass and economic values of understory species should be concerned when selecting the understory commercial tree species.
Eucalyptus urophyllaunderstory woody plantssoil microbial biomasssoil microbial community composition
国家科技期刊平台
NSTL
万方数据
维普
