土壤碳
固碳
环境科学
林地
碳纤维
生物量(生态学)
长袜
土壤水分
水文学(农业)
农林复合经营
农学
林业
土壤科学
生态学
地理
生物
地质学
二氧化碳
数学
复合数
岩土工程
算法
作者
Syed Ashraful Alam,Michael Starr,Barnaby Clark
标识
DOI:10.1016/j.jaridenv.2012.10.002
摘要
Mean tree biomass and soil carbon (C) densities for 39 map sheet grids (1° lat. × 1.5° long.) covering the Acacia woodland savannah region of Sudan (10–16° N; 21–36° E) are presented. Data from the National Forest Inventory of Sudan, Harmonized World Soil Database and FAO Local Climate Estimator were used to calculate C densities, mean annual precipitation (MAP) and mean annual temperature (MAT). Above-ground biomass C and soil organic carbon (SOC, 1 m) densities averaged 112 and 5453 g C m−2, respectively. Below-ground biomass C densities, estimated using root shoot ratios, averaged 33 g C m−2. Biomass C densities and MAP increased southwards across the region while SOC densities were lowest in the centre of the region and increased westwards and eastwards. Both above-ground biomass C and SOC densities were significantly (p < 0.05) correlated with MAP (rs = 0.84 and rs = 0.34, respectively) but showed non-significant correlations with MAT (rs = −0.22 and rs = 0.24, respectively). SOC densities were significantly correlated with biomass C densities (rs = 0.34). The results indicated substantial under stocking of trees and depletion of SOC, and potential for C sequestration. Up-to-date regional and integrated soil and forest inventories are required for planning improved land-use management and restoration.
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