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Carbon Storage of the Different Urban Communities in Huanchen Park in Hefei

Author: WuShanShan
Tutor: XuXiaoNiu
School: Anhui Agricultural University
Course: Ornamental Plants and Horticulture
Keywords: Biomass Carbon Sequestration Soil organic carbon content Soil respiration Urban forest
CLC: S718.5
Type: Master's thesis
Year: 2010
Downloads: 116
Quote: 1
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Abstract


Around Hefei City Park the ring Green Belt, the terrain is much more varied, and stand structure. This experiment used the survey method and volume source biomass estimates the combined research methods to study the distribution characteristics of Hefei City Park, the urban forest carbon storage; comparing the different community types of trees carbon sequestration capacity, and topsoil the carbon sequestration Features; using Li-6400-09 respiratory measurement system typical soil respiration characteristics and seasonal dynamics, soil temperature and moisture content of soil respiration. (1) Hefei park around the tree biomass carbon stock changes range of different vegetation types 1.41-142.04 kg / m ~ 2, the majority in the 100 kg / m ~~ 2 (equivalent to 10t/hm ~ 2) plots trees surveyed average carbon reserves of 24.97 kg / m ~ 2. The overall trend point of view, the lower value of the average carbon storage per unit area of ??the plots, the main reason for the vegetation around the city park young forest in the proportion of large, so its carbon sequestration capacity is relatively low. (2) based on the community structure characteristics and species composition of the forest communities of the major cities of Hefei City Park is divided into four major types: broad-leaved forest, mixed conifer, coniferous forest and woodland. Carbon sequestration capacity of trees of different community types are quite different. Unit area according to the size of the tree biomass carbon storage, carbon sequestration capacity of the different communities in order: the broadleaf forests gt; the mixed coniferous gt; the coniferous forests gt; open forest. (3) surveyed 21 stands ,0-10cm soil organic carbon content variation range 3.9-64.7 g / kg, 10-20cm layer of 2.2-45.2 g / kg. Different community types of soil organic carbon content differences are significant ,0-10cm of soil organic carbon content size as follows: the mixed coniferous gt; the broadleaf forests gt; the coniferous forests gt; open forest; 10-20cm soil layer in turn The mixed coniferous: the broadleaf forests gt; gt; the coniferous forests gt; open forest. (4) soil carbon sequestration capacity of the different community types there are some differences. Of various communities of soil organic carbon storage range :0.84-9 .36 kg / the m ~~, broad-leaved forest and coniferous and broad soil organic carbon storage in mixed communities, coniferous forest and open woodland soil organic carbon storage in the lower. In soil organic carbon storage in order: the broadleaf forests gt; the mixed coniferous gt; the coniferous forests gt; open forest. (5) certain soil bulk density, moisture content of the soil organic carbon content. According to the results of the correlation analysis, soil organic carbon content and soil bulk density was negatively correlated (r = -0.382). With the greater the surface soil bulk density, organic carbon content decreased. (6) the range, 1.99-4.03μmol / m ~ 2 / s based on experimental observations, the average of the different community types of soil respiration years. Daily mean maximum soil respiration appear in summer and lowest in winter. Summer soil respiration rate averaged 5.01μmol / m ~ 2 / s; winter only 1.11μmol / m ~~ 2 / s. The size of different communities average annual soil respiration rate as follows: open woodland gt; the broadleaf forests gt; the mixed coniferous gt; coniferous forest. Open woodland soil respiration rate highest. (7) analysis, showing a significant exponential relationship between soil respiration rate and soil surface temperature, the correlation coefficients of the different community types R to 2 = 0.35-0.92. Soil moisture conditions also affect the soil respiration. Fact, not isolated between the influencing factors of soil respiration, soil temperature and moisture content of the interaction of soil respiration significant impact.

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CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest Biology > Forest Ecology
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