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Spatial Expansion and Soil Organic Carbon Storage Changes of Croplands in the Sanjiang Plain, China
W. D. Man, H. Yu, L. Li, M. Y. Liu, D. H. Mao, C. Y. Ren, Z. M. Wang, M. M. Jia, Z. H. Miao, C. Y. Lu and H. Y. Li; 毛德华 任春颖
2017
发表期刊Sustainability
卷号9期号:4
摘要Soil is the largest pool of terrestrial organic carbon in the biosphere and interacts strongly with the atmosphere, climate and land cover. Remote sensing (RS) and geographic information systems (GIS) were used to study the spatio-temporal dynamics of croplands and soil organic carbon density (SOCD) in the Sanjiang Plain, to estimate soil organic carbon (SOC) storage. Results show that croplands increased with 10,600.68 km(2) from 1992 to 2012 in the Sanjiang Plain. Area of 13,959.43 km(2) of dry farmlands were converted into paddy fields. Cropland SOC storage is estimated to be 1.29 +/- 0.27 Pg.C (1 Pg = 10(3) Tg = 10(15) g) in 2012. Although the mean value of SOCD for croplands decreased from 1992 to 2012, the SOC storage of croplands in the top 1 m in the Sanjiang Plain increased by 70 Tg.C (1220 to 1290). This is attributed to the area increases of cropland. The SOCD of paddy fields was higer and decreased more slowly than that of dry farmlands from 1992 to 2012. Conversion between dry farmlands and paddy fields and the agricultural reclamation from natural land-use types significantly affect the spatio-temporal patterns of cropland SOCD in the Sanjiang Plain. Regions with higher and lower SOCD values move northeast and westward, respectively, which is almost consistent with the movement direction of centroids for paddy fields and dry farmlands in the study area. Therefore, these results were verified. SOC storages in dry farmlands decreased by 17.5 Tg.year(-1) from 1992 to 2012, whilst paddy fields increased by 21.0 Tg.C.year(-1).
DOI10.3390/Su9040563
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.iga.ac.cn/handle/131322/7615
专题湿地与全球变化学科组
通讯作者毛德华 任春颖
推荐引用方式
GB/T 7714
W. D. Man, H. Yu, L. Li, M. Y. Liu, D. H. Mao, C. Y. Ren, Z. M. Wang, M. M. Jia, Z. H. Miao, C. Y. Lu and H. Y. Li,毛德华 任春颖. Spatial Expansion and Soil Organic Carbon Storage Changes of Croplands in the Sanjiang Plain, China[J]. Sustainability,2017,9(4).
APA W. D. Man, H. Yu, L. Li, M. Y. Liu, D. H. Mao, C. Y. Ren, Z. M. Wang, M. M. Jia, Z. H. Miao, C. Y. Lu and H. Y. Li,&毛德华 任春颖.(2017).Spatial Expansion and Soil Organic Carbon Storage Changes of Croplands in the Sanjiang Plain, China.Sustainability,9(4).
MLA W. D. Man, H. Yu, L. Li, M. Y. Liu, D. H. Mao, C. Y. Ren, Z. M. Wang, M. M. Jia, Z. H. Miao, C. Y. Lu and H. Y. Li,et al."Spatial Expansion and Soil Organic Carbon Storage Changes of Croplands in the Sanjiang Plain, China".Sustainability 9.4(2017).
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