Effects of sandy desertified land rehabilitation on soil carbon sequestration and aggregation in an arid region in China

Journal of Environmental Management
Yong Zhong SuJaehoon Lee

Abstract

The rehabilitation of sandy desertified land in semi-arid and arid regions has a great potential to increase carbon sequestration and improve soil quality. Our objective was to investigate the changes in the soil carbon pool and soil properties of surface soil (0-15 cm) under different types of rehabilitation management. Our study was done in the short-term (7 years) and long-term (32 years) desertification control sites in a marginal oasis of northwest China. The different management treatments were: (1) untreated shifting sand land as control; (2) sand-fixing shrubs with straw checkerboards; (3) poplar (Populus gansuensis) shelter forest; and (4) irrigated cropland after leveling sand dune. The results showed that the rehabilitation of severe sandy desertified land resulted in significant increases in soil organic C (SOC), inorganic C, and total N concentrations, as well as enhanced soil aggregation. Over a 7-year period of revegetation and cultivation, SOC concentration in the recovered shrub land, forest land and irrigated cropland increased by 4.1, 14.6 and 11.9 times compared to the control site (shifting sand land), and increased by 11.2, 17.0 and 23.0 times over the 32-year recovery period. Total N, labile C (KMnO(4)-ox...Continue Reading

References

Sep 30, 2004·Environmental Management·Rattan Lal
Nov 28, 2006·Journal of Environmental Management·D S YuY C Zhao
Jan 27, 2007·Journal of Environmental Management·Zhi-Ping WangLing-Hao Li

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Citations

Mar 10, 2015·International Journal of Phytoremediation·Jia-Bin LiuZong-Rui Lai

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