Attribution of explanatory factors for change in soil organic carbon density in the native grasslands of Inner Mongolia, China
Attribution of explanatory factors for change in soil organic carbon density in the native grasslands of Inner Mongolia, China
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内蒙古原生草原土壤有机碳密度变化解释因素归因
DOI：
10.1007/s40333-018-0056-4
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发表时间：
2018-04
影响因子：
3
通讯作者：
Yan Ruirui
中科院分区：
文献类型：
--
作者：
Jin Dongyan;Murray Phil J;Xin Xiaoping;Qin Yifei;Chen Baorui;Qing Gele;Zhang Zhao;Yan Ruirui
土壤有机碳密度（SOCD）在不同时空尺度上的变化已被广泛记录。然而，一个准确的方法来检查归因的解释因素的变化SOCD仍然缺乏。本研究旨在通过比较20世纪60年代和21世纪10年代的数据，对与中国内蒙古天然草原SOCD变化相关的关键气候因素、人类活动和土壤性质进行属性和量化。2007年和2011年，我们对内蒙古天然草原1963-1964年的142个土壤剖面进行了重采样。在土壤A层（残积层）中测定SOCD。我们选择的解释因素的基础上的随机森林方法，并探讨了SOCD的变化与每个解释因素之间的关系，使用线性混合模型。结果表明，内蒙古SOCD的变化呈现出由东向西的变化趋势，2010年代的SOCD比20世纪60年代下降了18%。2010年代SOCD较低可能主要是由于年平均水面蒸发量的增加，这分别解释了SOCD变化的总变异和可解释变异的约10%和50%。土壤含砂量也是SOCD下降的重要解释因子，分别解释了SOCD变化的总变异和可解释变异的4%和21%。此外，放牧频率和持续时间的定量信息的收集也可能有助于提高我们的人为因素，管理SOCD的变化的理解。
The variation in soil organic carbon density (SOCD) has been widely documented at various spatial and temporal scales. However, an accurate method for examining the attribution of explanatory factors for change in SOCD is still lacking. This study aims to attribute and quantify the key climatic factors, anthropogenic activities, and soil properties associated with SOCD change in the native grasslands of Inner Mongolia, China, by comparing data between the 1960s and the 2010s. In 2007 and 2011, we resampled 142 soil profiles which were originally sampled during 1963–1964 in the native grasslands of Inner Mongolia. SOCD was determined in A horizon (eluvial horizon) of the soil. We selected the explanatory factors based on a random forest method, and explored the relationships between SOCD change and each of the explanatory factors using a linear mixed model. Our results indicated that the change in SOCD varied from the east to the west of Inner Mongolia, and SOCD was 18% lower in the 2010s than in the 1960s. The lower SOCD in the 2010s may primarily be attributed to the increasing in mean annual water surface evaporation, which explained approximately 10% and 50% of the total variation and explainable variation in the change in SOCD, respectively. The sand content of the soil is also a significant explanatory factor for the decrease in SOCD, which explained about 4% and 21% of the total variation and explainable variation in the change in SOCD, respectively. Furthermore, the collection of quantitative information on grazing frequency and duration may also help to improve our understanding of the anthropogenic factors that govern the change in SOCD.
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影响因子：
6.5
作者：
M. Wiesmeier;M. Steffens;A. Kölbl;I. Kögel‐Knabner
通讯作者：
M. Wiesmeier;M. Steffens;A. Kölbl;I. Kögel‐Knabner
影响因子：
6.1
作者：
I. Thomsen;P. Schjønning;Bendt Jensen;K. Kristensen;B. Christensen
通讯作者：
I. Thomsen;P. Schjønning;Bendt Jensen;K. Kristensen;B. Christensen
影响因子：
3.5
作者：
J. Reeder;G. Schuman;J. Morgan;D. Lecain
通讯作者：
J. Reeder;G. Schuman;J. Morgan;D. Lecain
影响因子：
3.7
作者：
S. Serneels;M. Linderman;E. Lambin
通讯作者：
S. Serneels;M. Linderman;E. Lambin
DOI：
10.3402/tellusb.v55i2.16715
发表时间：
2003-01
期刊：
Tellus B: Chemical and Physical Meteorology
影响因子：
--
作者：
Shaoqiang Wang;H. Tian;Jiyuan Liu;S. Pan
通讯作者：
Shaoqiang Wang;H. Tian;Jiyuan Liu;S. Pan