| 天山雪岭云杉个体生物量分配及其变化规律的研究 |
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| 引用本文： | 罗庆辉,许仲林,徐泽源,李路,常亚鹏,徐昕亿,宋昕妮.天山雪岭云杉个体生物量分配及其变化规律的研究[J].干旱区地理,2019,42(6):1378-1386. |
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| 作者姓名： | 罗庆辉 许仲林 徐泽源 李路 常亚鹏 徐昕亿 宋昕妮 |
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| 作者单位： | 新疆大学资源与环境科学学院,新疆乌鲁木齐830046;新疆大学资源与环境科学学院绿洲生态教育部重点实验室,新疆乌鲁木齐830046 |
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| 基金项目： | 国家自然科学基金项目（41361098、31500398） |
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| 摘 要： | 为了探讨天山雪岭云杉林生物量在个体组织中的分配情况及其变化规律，在研究区进行了大量的野外测量，利用已有的雪岭云杉林估算方程，分析了天山雪岭云杉林生物量在各器官（干、枝、叶、皮、根）中的分配及其变化规律。结果表明：（1） 研究区雪岭云杉林的平均生物量为388.74 t·hm-2，树木各器官中，干、枝、根、叶和皮分别占生物量的43.65%、28.60%、13.49%、11.08%和3.18%。（2）各径级生物量所占百分比为：33.53%（40~50 cm）、20.13%（20~30 cm）、19.59%（30~40 cm）、18.19%（50~60 cm）和2.05%（10~20
cm）；树木生物量在不同树高中的分配表现为：48.78%（20~30 m）＞35.27%（10~20 m）＞14.70%（30~40 m）＞1.25%（0~10
m）；地上和地下生物量的分配比例为：87.54%和12.46%，分别为340.30 t·hm-2和48.44 t·hm-2。（3） 随海拔升高，天山雪岭云杉林生物量呈“单峰”变化，在海拔2 100~2 400 m处达到最大值611.58 t·hm-2；干、皮生物量所占比例随海拔升高而减小，枝生物量逐渐增加，叶、根生物量呈先减小后增加的趋势；径级20~30 cm、30~40 cm和50~60 cm的生物量随海拔升高均呈“单峰型”变化趋势，都在海拔2 100~2 400 m处达到最大；雪岭云杉林不同树高生物量随海拔的升高呈现的趋势不同。天山雪岭云杉林生物量和年均降水量随经纬度的升高均呈降低变化，研究区林分生物量自西向东总体呈现逐渐降低的趋势；林分密度、海拔和降水共同决定了森林生物量的大小及其变化规律，海拔2 100~2 400 m是本研究区雪岭云杉林生长的最适宜场所。结果可为雪岭云杉林生态系统的恢复和重建提供基础资料，对研究区进行综合管理与生态健康分析具有重要意义。
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| 关 键 词： | 雪岭云杉林 个体生物量 分配 器官 环境因子 |
| 收稿时间： | 2019-03-16 |
Individual
biomass allocation and its variation of Picea
schrenkiana forests |
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| LUO Qing-hui,XU Zhong-lin,XU Ze-yuan,LI Lu,CHANG Ya-peng,XU Xin-yi,SONG Xin-ni.Individual
biomass allocation and its variation of Picea
schrenkiana forests[J].Arid Land Geography,2019,42(6):1378-1386. |
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| Authors: | LUO Qing-hui XU Zhong-lin XU Ze-yuan LI Lu CHANG Ya-peng XU Xin-yi SONG Xin-ni |
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| Institution: | 1
College of Resources and Environmental Sciences, Xinjiang University, Urumqi
830046,Xinjiang,China;
2 Key Laboratory of
Oasis Ecology, College of Resource
and Environmental Science, Xinjiang University, Urumqi 830046,Xinjiang,China |
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| Abstract: | The
Tianshan Mountains are an important source of water in Xinjiang, China. The Picea schrenkiana forest is the dominant
species of Xinjiang’s mountain forests. This
study takes P.schrenkiana forest as
the research object,and discusses the distribution and variation of the biomass
of P.schrenkiana forest in various
organs (stems, branch, leaves, bark, roots) ,which will provide data support
for the integrated forest management in the study area and be of great
significance for the protection, restoration and development of P.schrenkiana forest of the Tianshan
Mountains. A total of 78 sampling plots with a radius of 10 m were set up from
the elevation of 1 500-2 800 m with P.schrenkiana（Schrenk’s spruce）forest of Tianshan Mountains, and
all trees in the plots was measured. According to the established biomass
estimation equations of P.schrenkiana forest, this study analyzed the distribution and variation of the biomass of P.schrenkiana forest in the Tianshan
Mountains. The results show as follows: (1) The mean value of biomass of P.schrenkiana forest in the study area
was 388.74 t·hm-2, and the
stems, branches, roots, leaves and bark accounted for
43.65%,28.60%,13.49%,11.08% and 3.18% of the biomass, respectively. The
proportion of stems is the largest, and the proportion of bark is the smallest;
the percentage of biomass in each diameter class is:33.53% (40-50 cm),20.13%
(20-30 cm),19.59% (30-40 cm),18.19% (50-60 cm) and 2.05% (10-20 cm);the
proportion of tree biomass in different tree height scales is forming a
descending order list as follows:48.78% for the height range from 20m to 30
m,35.27% for the height range from 10 m to 20 m, 14.70% for the height range from 30 m to 40 m and
1.25% for the height range from 0 m to 10 m; the distribution percentage of aboveground
biomass and belowground biomass is: 87.54% (340.30 t·hm-2) and 12.46% (48.44
t·hm-2),
respectively. (2) There was a hump-shaped curve by which the biomass of P.schrenkiana forest reached its peak
value of 611.58 t·hm-2 at the
elevation of 2 100-2 400 m. The minimum value of biomass at 1 500-1 800 m was
171.38 t·hm-2, and the
value of biomass at 1 800-2 100 m was 402.05±291.58
t·hm-2, and the
value of biomass at 2 400-2 800 m was 369.97±205.09
t·hm-2. The
proportions of stems and bark biomass were decreased along with the increase of
elevation, the biomass of branches was increased gradually, and the biomass of
leaves and roots was decreased first and then increased. The biomass of P.schrenkiana with diameters being 20-30 cm,30-40 cm and
50-60 cm displayed a hump-shaped curve with the increase of elevation, and
reached its peak value at the elevation of 2 100-2 400 m. The biomass of P.schrenkiana with a tree height of
10-20 m was gradually increased with the increase of elevation, and the biomass
of P.schrenkiana with a tree height
of 20-30 m was increased first and then decreased, reaching a maximum value at
the altitude of 2 100-2 400 m. The biomass of the forest showed a decreasing
trend from the west to the east in the study area. The forest density,
elevation and precipitation jointly determined the size of forest biomass and
its variation. The places at the elevation of 2 100-2 400 m are the most
suitable places for growing P.schrenkiana forest in this study area. |
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| Keywords: | Times New Roman" serif Picea schrenkiana">Picea schrenkianaTimes New Roman" serif forest" target="_blank">"> forest individual biomass allocation organs environmental factors |
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