豫南35年生马尾松林生态系统碳库特征及其分配

Carbon storage and allocation of 35-year-old Pinus massoniana forest ecosystem in southern of Henan province

对豫南35年生马尾松林生态系统的生物量、碳贮量及其空间分布特征进行研究。采用分层切割法和相对生长方程计算乔木层生物量和林下植被生物量,C、N元素分析仪测定碳含量。研究结果表明:35年生马尾松林生态系统的总生物量平均为228.6 t.hm-2,其中乔木层生物量占88.9%,灌木层占7.7%,草本层占0.1%,凋落物层占2.7%;马尾松林生态系统总碳库为218.11 t.hm-2,其中植被总碳贮量为127.69 t.hm-2,土壤有机碳库为90.42 t.hm-2;乔木层碳库(115.52 t.hm-2)占生态系统碳库的52.96%,灌木层占3.80%,草本层占0.28%,现存凋落物层占1.50%,矿质土壤层碳库占生态系统碳库的41.46%。

The carbon storage,biomass and spatial distribution of 35-year-old Pinus massoniana forest ecosystem at Nanwan Experiment Forest Farm in Xinyang of Henan province was studied.The methods of allometric dimension analysis and sampling harvest were used to estimate the biomass of shrub and herbage layers,respectively.Carbon content of plants and soil samples in the stand were determined by using an ELEMEN TAR Vario EL III CN Analyzer.The results show that the total biomass was 228.6 t·hm-2 in Pinus massoniana forest ecosystem,the distributing sequence of the biomass in different layers was： arbor layer（88.9%） shrub layer（7.7 %） litters layer（2.7%） herb layer（0.1 %）.The total organic carbon storage amounted to 218.11 t·hm-2 in Pinus massoniana forest ecosystem,of which vegetation layer stored 127.69 t·hm-2.Carbon storage of tree,shrub,herb,litters and soil stored were 115.52 t·hm-2,8.28 t·hm-2,0.62 t·hm-2,3.27 t·hm-2 and 90.42 t ·hm-2,respectively.Allocation of carbon pool to composing of forest ecosystem accounted for 52.96 %,3.80%,0.28%,1.50% and 41.46 %,respectively.