Analysis of the carbon stock structure in forest plantations with different regeneration methods
Analysis of the carbon stock structure in forest plantations with different regeneration methods
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发表时间：
2012
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通讯作者：
Hu Guohua
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作者：
Hu Guohua
本文以马尾松人工林、杉木人工林、天然阔叶次生林、杉木人工林、天然阔叶次生对皖南岭南林场人工针阔混交次生林进行了研究，结果表明：（1）人工针阔混交次生林树干生物量密度最大（67.32±56.57）mg·hm-2，杉木人工林最低（43.79±9.13）mg.hm-2，马尾松人工林树干生物量所占比例最大（64.04±1.49）%，但次生混合阔叶林的碳储量最高（126.47±90.75）mg C·hm-2;（2）在四种人工林中，天然阔叶次生林和马尾松种植园的碳密度最高，分别为95.67和98.21 mg.hm-2，杉木种植园生物量碳密度最低，为55.41 mg.hm-2，灌木层生物量碳密度最高针阔混交次生林为（17.438± 24.627）mg hm 2，而草本层和凋落物层的碳储量最大（1.326 ± 0.431）和（5.517±2.846）mg·hm-2;（3）针阔混交林地下碳储量最高（10.5±9.8）mg hm-2，其次为针阔混交次生林、杉木人工林、地上部分碳储量由大到小依次为针阔混交林、针阔混交次生林、马尾松种植园林、4种人工林中，杉木人工林的根茎比最大，为0.21±0.01，杉木种植园根灌比最大，为1.61±0.11;（4）针阔混交林乔木层和草本层的碳比例与树干密度呈正相关，乔木层碳素比例与平均胸径、树干密度呈负相关，除种植园外，灌木层碳素比例与胸径、树干密度呈负相关。
Forest regeneration can maintain and facilitate forest resources,and is the process for adjusting forest structure,fulfilling sustainable forest management,and creating efficient multi-functional forest ecosystems.In this study,we compared carbon stock structure aiming four typical forest communities including Masson pine plantations,Chinese fir plantations,natural mixed broad-leaved secondary forest,artificial mixed needle-broad leaved secondary forest in Lingnan forestry farm in southern Anhui province,China.The results showed that:(1) the maximum stem biomass density was found in the artificial needle-broad leaved mixed secondary forest(67.32±56.57) mg.hm-2,and the minimum was in Chinese fir plantations(43.79±9.13) mg.hm-2.The largest proportion of stem biomass occurred in Masson pine plantations(64.04±1.49)%,but the mixed broad-leaved secondary had the highest carbon storage(126.47±90.75) mg C.hm-2;(2) Among the four forest plantations,the natural mixed broad-leaved secondary forest and Masson pine plantation had the highest carbon density 95.67 and 98.21 mg.hm-2,respectively,while the Chinese fir plantation has the lowest C density 55.41 mg.hm-2.The shrub layer had the highest biomass carbon density(17.438± 24.627) mg hm2 in the mixed broad-leaved secondary forest,but the herb layer and litter layer stored the most carbon(1.326 ± 0.431) and(5.517±2.846) mg.hm-2,respectively in the Masson pine plantation;(3) the underground carbon storage in the mixed broad-leaved forest was the highest(10.5±9.8) mg hm-2,and followed by the mixed needle-broad leaved secondary forest,the Chinese fir plantations,and the Masson pine plantations.The aboveground carbon storage was in the order from the large to smallest for the mixed broad-leaved forest,the mixed needle-broad leaved secondary forest,the Masson pine plantation,and the Chinese fir plantation.The biggest ratio of root to stem was found in the Chinese fir plantations 0.21±0.01 among the four forest plantations,while the ratio of root to stem shrub layer was the biggest 1.61±0.11 within the Chinese fir plantation;(4) There was a positive correlation between stem density and carbon proportion of the tree layer or that of the herb layer in the mixed broad-leaved forest,while a negative correlation was found between the carbon proportion of the tree layer and the average diameter at breast height(DBH) or the stems density.Except for the Chinese fir plantation,carbon density in the shrub layer was negatively correlated with DBH or the stems density factors.