测定和分析湖南会同毛竹林土壤的碳贮量和各组分呼吸量。结果表明: 毛竹林土壤有机碳贮量为115.558 t·hm-2,矿质土壤层、凋落物层和根系分别占96.01%,0.64%和3.34%; 毛竹林地土壤年呼吸排放碳总量为9.257 t·hm-2a-1,异养呼吸、自养呼吸和凋落物年呼吸量分别占59.49%,28.27%和12.24%; 毛竹林细根年生长量为6.895 t·hm-2a-1,年分解量为0.312 t·hm-2a-1,细根年周转率为0.93次·a-1; 毛竹林年凋落物进入土壤的碳总量为2.245 t·hm-2a-1,地上和地下凋落物分别占78.5%和21.5%。
The carbon storage and respiration of each soil compartment of Phyllostachy edulis plantation in Huitong forest region, Hu,nan Province were analyzed in this paper. The results showed that the soil organic carbon storage density of the plantation was 115.558 t·hm-2, and mineral soil layer, litter layer and root layer occupied 96.01%, 0.64% and 3.34%, respectively The amounts of annual carbon released by soil respiration were 9.257 t·hm-2a-1, and heterophic respiration, autotrophic respiration and litter respiration occupied 59.49%,28.27% and 12.24% of the total soil respiration respectively.The fine root growth rate and decomposation rate of P.edulis plantation were 6.895 and 0.312 t·hm-2a-1, respectively. The annual turnover of fine root in P.edulis plantation was 0.93 time. a-1 The annual carbon input into P.edulis plantation soil through litter fall was 2.245 t·hm-2a-1, of which 78.5% was from aboveground litter and 21.5% was from underground dead roots.
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