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根据湖南会同生态站14年的定位实测数据,对第2代杉木人工林乔木层的生物量分配进行了研究。结果表明:第2代14年生杉木人工林乔木层的生物量为127.55t/hm2,干和根的增幅大体持平。生态系统生物量的分配比率大小顺序为:干>枝>根>叶>皮。第1、2代14年生杉木人工林乔木层生物量的差异明显,第2代杉木林的树干生物量仅占林分总生物量的61.8%,比第1代杉木人工林下降了17.46%,杉木连栽会使林木的经济系数下降。
According to the measured data of 14 years of Huitong Ecological Station in Hunan Province, the biomass allocation of tree layer in the second generation of Chinese fir plantation was studied. The results showed that the biomass of arbor layer in the second generation of 14-year-old Chinese fir plantation was 127.55t / hm2, and the increase of stem and root was almost the same. Ecosystem biomass distribution rate of the order of: stem> branch> root> leaf> skin. The biomass of arbor layer in 14-year-old and 14-year-old Chinese fir plantations was obviously different. The trunk biomass of the second generation Chinese fir plantation accounted for only 61.8% of the total biomass of the stand, 17.46% lower than that of the first generation of Chinese fir plantation, Cunninghamia continuous planting will make the economic coefficient of forest decreased.