Abstract:

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.

Key words: Phyllostachy edulis plantation, soil carbon storage, soil respiration, soil carbon cycle, Huitong