| 摘要: |
| [目的]火地塘林区地处我国秦岭南坡中段暖温带向亚热带气候的过渡带,对该林区主要森林类型及其碳储量和碳密度进行研究,可为我国森林生态系统碳平衡提供基础资料.[方法]基于生物量回归方程,计算火地塘林区主要森林类型(包括华山松(Pinus armandii)林、油松(P.tabulaeyormis)林、锐齿栎(Quercus aliena var.acuteserrat)林、红桦(Betula albo-sinensis)林和华北落叶松(Larix principisrupprechtii)林)的碳储量和碳密度,并结合GIS软件进行数据的空间分析,将森林碳与空间景观格局有效结合起来.[结果]在空间格局上,大面积的天然次生华山松、红桦林集中分布在海拔2 000 m以上地段;油松、锐齿栎林主要分布在海拔1 900 m以下;而人工引种的华北落叶松大面积分布于海拔2 200 m地势平坦的采伐迹地上.各森林类型中,碳储量以红桦林最高,其值达到19.476 6×10-3Tg.碳密度以华北落叶松人工林最高,其值为(30.909 7±13.980 2)t/hm2,且分别与油松和华山松的碳密度具有显著差异(P<0.05).各森林类型的平均生物量、碳储量和碳密度均随海拔高度的升高而增加.[结论]火地塘林区主要森林类型碳储量和碳密度的空间分布与森林的空间分布密切相关,具有水平和垂直地带性特征,其碳储量大小排序为红桦林>华山松林>锐齿栎林>华北落叶松林>油松林,碳密度大小排序为华北落叶松林>红桦林>锐齿栎林>华山松林>油松林. |
| 关键词: 碳储量 碳密度 空间分布 火地塘林区 秦岭 |
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| 基金项目:国家林业局重点项目 |
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| Research on carbon storage and carbon density of main forest types at Huoditang forestry region in the Qinling Mountains |
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| Abstract: |
| 【Objective】 Huoditang Forestry Region on south facing slope at middle mountain zones of Qinling Mountains lies in the transition zone from warm temperate to subtropical.There are rich plant species that have distinct elevation steepness characteristics in spatial distribution,and most of them are secondary forests.There are five main forest-types,including Pinus armandii forest,P.tabulaeformis forest,Quercus aliena var.acuteserrat forest,Betula albo sinensis forest,and Larix principisrupprechtii plantation.Research on carbon storage and carbon density of these forest types can give basic references for carbon balance in forest ecosystems in China. 【Method】 Based on biomass regression equation of five at the Huoditang forestry region,carbon storage and carbon density of these forest-types were calculated.With GIS computer software,the spatial distribution of forests and the carbon content in this area were analyzed and calculated. 【Result】 The results showed that the distribution of forests had different characteristics in different elevations.P.armandii and B.albo sinensis distributed in all districts,mainly above 2 000 m elevation.Q.aliena var.acuteserrat and P.tabulaeformis distributed under 1 900 m,and formed landscape of mixed forests with a few L.principisrupprechtii.The plantation was distributed in evenly cutting field in 2 200 m elevation.The changes of mean biomass, carbon storage,and carbon density of five forest-types were consistent with elevation.B.albo sinensis with highest value of carbon storage was 19.476 6×10－3 Tg.The highest value of carbon density of five forest types was L.principisrupprechtii,and its value was (30.909 7±13.980 2) t/hm2.There was siginifcant difference between L.principisrupprechtii and P.armandii (P＜0.05),and between L.principisrupprechtii and P.tabulaeformis (P＜0.05). 【Conclusion】 The spatial distribution of carbon storage and carbon density of main forest-types at Huodiang forestry region had same horizontal and vertical characteristics with landscqape characteristics of them.The order of value of carbon storage and carbon density was B.albo-sinensis＞P.armandii＞Q.aliena var.acuteserrata＞L.principisrupprechtii＞P.tabulaeformis and L.principisrupprechtii＞B.albo sinensis＞ Q.aliena var.acuteserrata＞P.armandii＞P.tabulaeformis respectively. |
| Key words: carbon storage carbon density spatial distribution Huodotang forestry region Qinling Mountains |
