---

作 者 ：马明东, 江洪, 罗承德, 刘跃建

期 刊 ：植物生态学报 2007年 31卷 2期 页码：305-312

关键词：云杉；碳密度；净生产量；碳贮量；

Keywords:spruce forests, carbon density, net primary production, carbon stock,

摘 要 ：

该文利用野外实际调查数据对四川西北部亚高山云杉(Picea asperata)天然林碳密度、净生产量、碳贮量及其分布进行了分析，结果表明，在调查区域，云杉天然林分平均生物量为230.37×103 kg[[rad]]hm^－2，其中乔木层为212.77×103 kg[[rad]]hm^－2，占林分生物量的92.30%。云杉天然林生态系统各组分的平均碳密度为树干57.85%，树皮47.12%，树枝51.22%，树叶48.27%和树根52 .39%，灌木层平均碳密度49.91%，草本层平均碳密度46.34%，地被层平均碳密度43.21%，枯落物层平均碳密度39.44%，土壤碳密度平均值为1.41%，随土层深度增加各层次土壤碳密度逐渐减少。云杉林平均生态系统总碳贮量为273.79×10³ kg[[rad]]hm^－2，其中乔木层109.30×10³ kg[[rad]]hm^－2，占云杉林生态系统总碳贮量的39.92%，灌木层5.69×10³ kg[[rad]]hm^－2，占2.08%，草本层1.26×10³ kg[[rad]]hm^－2，占0.46%，地被物层0.60×10³ kg[[rad]]hm^－2，占0.22%，枯落物层0.83×10³ kg[[rad]]hm^－2，占0.30%，林内土壤（0～100 cm）碳贮量为156.11×10³ kg[[rad]]hm^－2，占57.01%。云杉林的碳库分布序列为土壤（0～100 cm）＞乔木层＞灌木层＞草本层＞枯落物层＞地被物层。云杉天然林分平均净生产总量为6 838.5 kg[[rad]]hm^－2[[rad]]a^－1， 碳素年总净固量平 均为3 584.98 kg[[rad]]hm^－2 [[rad]]a^－1，其中乔木层净生产量为4 676 kg[[rad]]hm^－2[[rad]]a^－1，占 林分总量的68.38%，碳素年平均固定量2552.99 kg[[rad]]hm^－2[[rad]]a^－1，占林分总 量的71.21%。

Abstract:

Aims Carbon density, net production and carbon stock were estimated using data from natural spruce forests of Northwest Subalpine Sichuan. 
Methods We harvested biomass, litter and soil carbon and calculated net production by dividing biomass by forest age. 
Important findings The mean biomass of spruce forest is 230.37×10³ kg[[rad]]hm^－2, with the tree layer accounting for 212.77×10³ kg[[rad]]hm^－2 (92.36%). The percentage of carbon density in tree organs are stem 57.85%, bark 47.12%, branch 51.22%, leaf 48.27%, and root 52.39%. The percentages of carbon density in different strata are shrub 49.91%, herb 46.34%, duff 43.21%, litter 39.44%, and soil 1.41%. Carbon density declines with increased soil depth. The carbon stock is 273.79×10³ kg[[rad]]hm^－2, divided among the tree layer with 109.30×10³kg[[rad]]hm^－2 ( 39.92%), shrub 5 .69×10³ kg[[rad]]hm^-2 (2.08%), herb 1.26×10³kg[[rad]]hm^－2 (0.46%), duff 0.60×103 kg[[rad]]hm^-2(0.22%), litter 0.83×10³kg[[rad]]hm^－2 (0.30%), and soil (0-100 cm) 156.11 ×10³kg[[rad]]hm^－2 (57.01%). Therefore, the carbon stocks are ordered: soil (0-100 cm) > tree layer > shrub > herb > litter > duff. Mean net production is 6838.5 kg[[rad]]hm^－2[[rad]]a^－1, with the tree layer accounting for 4 676 kg[[rad]]hm^－2[[rad]]a^－1 (68.38%). Mean annual carbon sequestration is 3584.98 kg[[rad]]hm^－2[[rad]]a^－1, with the tree layer accounting for 2552.99 kg[[rad]]hm^－2[[rad]]a^－1(71.21%).

---