干旱区研究 ›› 2023, Vol. 40 ›› Issue (4): 615-622.doi: 10.13866/j.azr.2023.04.10 cstr: 32277.14.j.azr.2023.04.10
邱巡巡1,2(),曹广超2,3(),张进虎1,2,张卓4,刘梦琳1,2
收稿日期:
2022-07-30
修回日期:
2023-01-30
出版日期:
2023-04-15
发布日期:
2023-04-28
作者简介:
邱巡巡(1997-),女,博士研究生,研究方向为地表环境过程与生态响应. E-mail: 基金资助:
QIU Xunxun1,2(),CAO Guangchao2,3(),ZHANG Jinhu1,2,ZHANG Zhuo4,LIU Menglin1,2
Received:
2022-07-30
Revised:
2023-01-30
Published:
2023-04-15
Online:
2023-04-28
摘要:
森林生物量是研究森林第一性生产力的基础,其碳密度是评价森林生态系统结构功能的重要指标。为探究祁连山南坡阿咪东索小流域内青海云杉典型林分密度随海拔的变化特征,按不同海拔,采用生物量模型计算法,选择海拔2900~3200 m调查分析该区域内青海云杉乔木层和土壤层碳密度沿海拔梯度的变化特征,以期为祁连山青海云杉林碳储量估算提供基础数据。结果表明: 研究区总生物量平均值为135.59 t·hm-2,随着海拔升高,总生物量呈递减的趋势。乔木层碳密度平均值为70.51 t·hm-2,0~50 cm土层土壤有机碳密度平均值为154.01 t·hm-2,随海拔升高,乔木层碳密度呈递减的趋势,土壤有机碳密度呈先降低后升高的变化趋势。区内不同海拔青海云杉林生态系统碳密度为224.51 t·hm-2,其中乔木层和土壤层碳密度分别占总碳密度的30.5%和69.5%,随海拔上升呈下降的变化趋势。森林土壤碳库占比较大,加强对森林土壤的保护是维持森林生态平衡的强有力推进方向。
邱巡巡, 曹广超, 张进虎, 张卓, 刘梦琳. 祁连山南坡青海云杉林碳密度随海拔分布特征[J]. 干旱区研究, 2023, 40(4): 615-622.
QIU Xunxun, CAO Guangchao, ZHANG Jinhu, ZHANG Zhuo, LIU Menglin. Distribution characteristics of carbon density in the arbor and soil layers of Qinghai spruce forest on the southern slope of Qilian Mountains with altitude[J]. Arid Zone Research, 2023, 40(4): 615-622.
表3
不同海拔青海云杉林生物量分配格局及其乔木层碳密度"
海拔/m | 生物量/kg | 总生物量 /(t·hm-2) | 乔木层碳密度 /(t·hm-2) | |||
---|---|---|---|---|---|---|
干 | 叶 | 枝 | 根 | |||
2900 | 279.62±14.42A | 56.77±5.63A | 74.72±5.92A | 166.71±10.03A | 208.14±2.71A | 108.23±1.41A |
3000 | 147.46±11.86AB | 16.59±2.56B | 27.96±3.45B | 78.99±7.41AB | 177.5±15.76AB | 92.3±10.27AB |
3100 | 191.53±22.12AB | 30.24±8.21AB | 43.78±12.11AB | 108.42±13.21AB | 104.11±12.06BC | 54.14±6.69BC |
3200 | 116.48±1.36B | 10.47±0.24B | 19.4±0.35B | 59.94±0.82B | 52.6±3.46C | 27.35±1.8C |
平均值 | 183.76±26.62 | 28.52±7.65 | 41.47±9.09 | 103.52±17.47 | 135.59±24.15 | 70.51±12.56 |
表4
不同海拔各土层土壤有机碳密度"
海拔/m | 不同土层/cm | 合计/(t·hm-2) | ||||
---|---|---|---|---|---|---|
0~10 | 10~20 | 20~30 | 30~40 | 40~50 | ||
2900 | 34.55±3.85Aa | 27.8±5.44Ba | 35.37±5.63Aa | 27.02±6.43Aa | 19.71±1.08Aa | 144.49±3.07A |
3000 | 33.82±5.2Aa | 27.82±1.65Ba | 22.54±0.69Aa | 25.86±3.27Aa | 24.28±0.59Aa | 134.33±2.42A |
3100 | 47.55±2.94Aab | 53.51±1.12Aa | 42.84±2.64Ab | 16.46±1.11Ac | 9±4.42Ac | 169.36±5.98A |
3200 | 32.18±0.18Aa | 44.39±9.91ABa | 27.12±1.04Aa | 36.88±1.13Aa | 27.27±5.96Aa | 167.84±3.17A |
平均值 | 37.03±3.27 | 38.38±4.7 | 31.97±3.76 | 26.55±3.49 | 20.07±3.57 | 154.01±9.57 |
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