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- W2378699115 abstract "Soil carbon sequestration and potential has been a focal issue in global carbon research.Under the background of global change,the estimation of the extent well as its change of soil organic carbon(SOC) storage is of great importance.Based on soil data from the second soil survey of China and field survey during 2011-2012,this paper studied spatial distribution and changes of topsoil(0-20 cm) organic carbon storage in Inner Mongolia grassland between the 1980 s and 2010 s,by using the regression relation between soil data and remote sensing data.The results showed that(1) the SOC storage values in Inner Mongolia grassland in the 1980 s and 2010 s were estimated to be 2.05 and 2.17 Pg C,with an average density of 3.48 and 3.69 kg C · m-2,respectively.The SOC storage was mainly distributed in the typical steppe and meadow steppe,which accounted for over 98% of the total.The spatial distribution showed a decrease trend from the meadow steppe,typical steppe to the desert steppe,corresponding to the temperature and precipitation gradient.(2) SOC variations during 1982-2012 were estimated to be 0.12 Pg C,at 7.00 g C· m-2· yr-1,which did not show a significant change.This indicates that SOC storage in grassland ecosystem of Inner Mongolia remained relatively stable over this period.However,topsoil organic carbon of different grassland ecosystems showed different trends of carbon source/sink during the past three decades.Meadow steppe and typical steppe,as a carbon sink,had sequestered at0.15 and 0.03 Pg C,respectively,while desert steppe,as a carbon source,had lost 0.06 Pg C.It is concluded that SOC storage in grassland ecosystem may respond differently to climate change,which is related to vegetation type,regional climate type and grazing intensity.These results will provide references for decision makers to find proper resolutions to protect grassland soil resource." @default.
- W2378699115 created "2016-06-24" @default.
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- W2378699115 date "2014-01-01" @default.
- W2378699115 modified "2023-09-23" @default.
- W2378699115 title "Topsoil organic carbon storage and its changes in Inner Mongolia grassland from the 1980s to 2010s" @default.
- W2378699115 hasPublicationYear "2014" @default.
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