【摘要】 对河南信阳5个林龄阶段(5、10、15、20和25年生)的杉木人工林生态系统生物量、碳密度、碳贮量及其空间分布特征进行研究。结果表明:5个林龄阶段杉木林生态系统总生物量随着林龄的增加而增加,分别达到了32.72、60.28、79.76、117.02和133.66 t.hm-2。各组分生物量均呈现乔木>灌木>草本>凋落物。生态系统总碳贮量分别达到122.28、144.77、156.16、176.10和185.16 t.hm-2;其中,杉木林生态系统的乔木层总碳贮量分别达到了10.08、24.37、36.08、53.74和62.10 t.hm-2,占整个系统的比例为8.2%~33.5%;灌木层碳贮量占0.5%~2%;草本层占0.1%~1.7%;凋落物层碳贮量占0.3%~1.1%。5个林龄阶段杉木林生态系统土壤总碳贮量分别达到107.21、115.98、117.52、119.03和119.80 t.hm-2,占整个生态系统碳贮量的64.7%~87.7%;杉木林生态系统年固碳能力分别为5.85、6.01、4.60、6.29和4.46 t.hm-2.a-1。更多还原

【Abstract】 The investigation on biomasses,carbon density,carbon stock and spatial distribution as well as their variations in 5 different age stands(5-year-old,10-year-old,15-year-old,20-year-old and 25-year-old) of Chinese fir(Cunninghamia lanceolata) plantation ecosystem was carried out in Nanwan Experiment Forest Farm of Xinyang City,using standard trees sampling method.The results show that biomasses were enhanced with stands age grow,were 32.72,60.28,79.76,117.02 and 133.66 t·hm-2,respectively.Components of layer were in order as: tree layer > shrub layer > herb layer > litter-fall layer.Total carbon content of 5 different age stands were 122.28,144.77,156.16,176.10 and 185.16 t·hm-2,respectively.The tree layer carbon contents were increases with stands age addition,were 10.08、24.37,36.08,53.74 and 62.10 t·hm-2,respectively.But the soil carbon contents were increased with ages addition,were 107.21,115.98,117.52,119.03 and 119.80 t·hm-2,respectively.Tree,shrub,herb,litter-fall and soil layers carbon contents accounted for 8.2%~33.5%,0.5%~2%,0.1%~1.7%,0.3%~1.1% and 64.7%~87.7% against total,respectively.The annual net sequestration carbon of Chinese fir plantation ecosystem in 5 different age stands were 5.85,6.01,4.60,6.29 and 4.46 t·hm-2·a-1,respectively.更多还原