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Elevational gradients and distributions of aggregate associated organic carbon and nitrogen and stability in alpine forest ecosystems

文献类型：期刊论文

作者Kong, Junqia1,2; He, Zhibin2; Chen, Longfei2; Yang, Rong2; Du, Jun2; Lin, Pengfei2; Zhu, Xi2; Tian, Quanyan2
刊名SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
出版日期2020-12-23
页码12
ISSN号0361-5995
DOI10.1002/saj2.20121
通讯作者He, Zhibin(hzbmail@lzb.ac.cn)
英文摘要Distribution and elevational controls on soil aggregate-associated organic carbon (OC) and nitrogen (N) in alpine soils are not well known, but may be critical to the stabilization of soil C and N pools in alpine areas. In this study, we determined the variability in aggregate associated OC and N concentration and aggregate-stability in 0 to 20 cm layers along the elevation gradient in an alpine forest (2,600-3,200 m) of the Qilian Mountains. The results showed that 1-2 mm macroaggregate accounted for the largest proportion (33.9%) of all aggregate fractions, and also contributed greater proportions (33.2 and 32.6%) to OC and N in bulk soils. Concentrations of OC and N, and C to N ratio increased with increasing aggregate size across all elevations. With increasing elevation, the proportion of >1 mm macroaggregates, mean weight diameter (MWD) and geometric mean diameter (GMD) increased significantly (p < .01). Aggregate OC and N concentration and C to N ratios, and the contribution of > 1 mm aggregate OC and N to OC and N in bulk soils also increased significantly (p < .01), while the contribution of 0.25-1 mm and 0.053-0.25 mm aggregates decreased with increasing elevation. In addition, MWD, GMD, OC and N concentration in aggregate decreased with mean annual temperature (MAT) and increased with mean annual precipitation (MAP). Our results demonstrated that the stability of soil structure improved, and accumulation of OC was mainly due to increases in the contribution of OC in the >1 mm macroaggregate with increasing elevation. Given that higher elevations in this alpine forest support large concentrations of SOC and macroaggregate OC, which may be vulnerable to climate warming.
WOS关键词LAND-USE CHANGE ; SOIL AGGREGATION ; CLIMATE-CHANGE ; LOESS PLATEAU ; MATTER ; DYNAMICS ; FRACTIONS ; PATTERNS ; SEQUESTRATION ; DECOMPOSITION
资助项目National Natural Science Foundation of China[41701296] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23060301] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23060302] ; NationalKeyResearch and Development Program of China[2019YFC0507403] ; Second Tibetan Plateau Scientific Expedition andResearch (STEP) program
WOS研究方向Agriculture
语种英语
WOS记录号WOS:000601395300001
出版者WILEY
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; NationalKeyResearch and Development Program of China ; Second Tibetan Plateau Scientific Expedition andResearch (STEP) program
源URL[http://ir.igsnrr.ac.cn/handle/311030/137746]  
专题中国科学院地理科学与资源研究所
通讯作者He, Zhibin
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Linze Inland River Basin Res Stn, Key Lab Ecohydrol Inland River Basin, Chinese Ecosyst Res Network,Northwest Inst Ecoenv, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Kong, Junqia,He, Zhibin,Chen, Longfei,et al. Elevational gradients and distributions of aggregate associated organic carbon and nitrogen and stability in alpine forest ecosystems[J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,2020:12.
APA Kong, Junqia.,He, Zhibin.,Chen, Longfei.,Yang, Rong.,Du, Jun.,...&Tian, Quanyan.(2020).Elevational gradients and distributions of aggregate associated organic carbon and nitrogen and stability in alpine forest ecosystems.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,12.
MLA Kong, Junqia,et al."Elevational gradients and distributions of aggregate associated organic carbon and nitrogen and stability in alpine forest ecosystems".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL (2020):12.

入库方式： OAI收割

来源：地理科学与资源研究所

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