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调查了两个阔叶树种(固氮树种桤木Alnus cremastogyne Burkill和非固氮树种五角枫Acer mono Maxim)及凋落物施放对杉–阔混交林生物量和土壤微生物性质的影响.结果表明,杉–阔混交林中杉木生物量没有显著差异(P>0.05),杉木–桤木混交林总生物量比杉木–五角枫多200%(P<0.05),增加的生物量源于阔叶树种的差异.凋落物对两个类型混交林的生物量都没有产生显著影响(P>0.05).桤木混交处理0～10cm层土壤的土壤有机碳增加了16.8%,而土壤基础呼吸和呼吸熵下降了13.1%和16%.覆盖凋落物使0～10cm层的微生物量碳增加了10.8%,此外,树种和凋落物对土壤基础呼吸和呼吸熵有显著的交互作用(P<0.05).土壤有机碳和树木的生物量呈显著的正相关(R=0.775,P=0.005,N=12).不考虑处理间的差异,土壤微生物量碳与土壤有机碳(R=0.438,P=0.032,N=24)、可溶性有机碳(R=0.0.541,P=0.006,N=24)具有显著的相关性.混交林树种的选择和凋落物对杉–阔混交林林地土壤微生物学性质都具有重要的作用.图3表2参23
The effects of two broad-leaved tree species (Alnus cremastogyne Burkill and non-nitrogen-fixing perennial Acer mono Maxim) and litterfall on the biomass and soil microbial properties of the Chinese fir-broadleave mixed forest were investigated. The total biomass of Chinese fir and Alnus cremastogyne mixed forest was 200% more than that of Cunninghamia lanceolata (P <0.05), and the increased biomass was due to the difference of broadleaf species. There was no significant effect on the biomass of the two types of mixed forest (P> 0.05), while the soil organic carbon of 0-10 cm soil layer increased by 16.8% and the soil respiration and respiration entropy decreased by 13.1% 16% .The coverage of litter increased the microbial biomass C by 10.8% in 0 ~ 10cm layer, and the tree species and litter had significant interaction on soil respiration and respiration entropy (P <0.05) (R = 0.775, P = 0.005, N = 12). Regardless of the differences among treatments, the soil microbial biomass carbon and soil organic carbon (R = 0.438, P = 0.032, N = 24) Soluble organic carbon (R = 0.0.541, P = 0.006, N = 24) had a significant correlation. Selection and cedar Litter - Soil Microorganisms properties are an important role Mixed broad reference 23 in FIG. 3 in Table 2.