Effects of riparian land use changes on soil aggregates and organic carbon
Effects of riparian land use changes on soil aggregates and organic carbon
复制标题
河岸土地利用变化对土壤团聚体和有机碳的影响
DOI：
10.1016/j.ecoleng.2017.12.015
复制
发表时间：
2018-03
影响因子：
3.8
通讯作者：
Guan Wenyi
中科院分区：
文献类型：
--
作者：
Qian Jin;Liu Jingjing;Wang Peifang;Wang Chao;Hu Jing;Li Kun;Lu Bianhe;Tian Xin;Guan Wenyi
土壤团聚过程在重建土壤结构和功能以及保护土壤有机碳（SOC）以维持土壤肥力和质量方面发挥着至关重要的作用。人们对防止陆地和水生生态系统界面的土壤侵蚀有着浓厚的兴趣。河岸带土壤团聚体与 SOC 之间的关系不像陆地生态系统那样得到充分研究。本研究的目的是调查废弃土地转耕地对有机碳（C）和土壤结构的影响。土壤样品和植物残体采集自废弃地和10多年前废弃地改耕的耕地。结果表明，土地利用变化后，SOC含量和储存量分别增加了1.64倍和6.75Mghm−2。对于耕地，11.94%的大团聚体（>2mm）破碎为微团聚体（<2mm），导致平均重量直径（MWD）和几何平均直径（GMD）分别减少1.01和1.11毫米，而分形维数（FD）增加0.28。无论是荒地还是耕地，微团聚体的 SOC 含量（10.88–15.02gkg−1）均高于大团聚体（10.10–11.63gkg−1）。耕地微团聚体SOC含量(14.46~15.02gkg−1)高于荒地(10.80~11.14gkg−1)。微生物量碳（MBC）含量增加了1.52倍，这是由于根系生物量增加和植物残体返回土壤所致，这主要是由于耕作方式和土壤水分条件的变化造成的。我们的结果表明，土地利用从废弃地转为耕地时，总有机碳储存量增加，这表明种植水生植物可能是防止河岸生态系统碳流失的有效方法。这项研究的结果为了解河岸地区土地利用变化后土壤团聚体和土壤碳固存的变化提供了见解。
Soil aggregation processes play a crucial role in re-establishing soil structure and function, and protecting soil organic carbon (SOC) to sustain soil fertility and quality. There is a strong interest in preventing soil erosion in the interface of terrestrial and aquatic ecosystem. The relationship between soil aggregates and SOC in riparian zones is not as well studied as in terrestrial ecosystems. The aim of this study was to investigate the effects of conversion of abandoned lands to cultivated lands on organic carbon (C) and soil structure. Soil samples and plant residues were collected from abandoned lands and cultivated lands which had been converted from abandoned lands over 10 years ago. Results show that SOC content and storage increases by 1.64 times and 6.75 Mg hm−2, respectively, after the land use change. For cultivated lands, 11.94% of macro-aggregates (>2 mm) were broken into micro-aggregates (<2 mm), resulting in the mean weight diameter (MWD) and geometric mean diameter (GMD) decreases of 1.01 and 1.11 mm, respectively, while the fractal dimension (FD) increased by 0.28. The SOC content of micro-aggregates (10.88–15.02 g kg−1) was higher than that of macro-aggregates (10.10–11.63 g kg−1) for both abandoned and cultivated lands. The SOC content of micro-aggregates for cultivated lands (14.46–15.02 g kg−1) was higher than abandoned lands (10.80–11.14 g kg−1). The content of microbial biomass carbon (MBC) increased by 1.52 times due to increases in root biomass and the plant residue returned to soil, which were mainly caused by the changes in cultivation practices and soil water conditions. Our results show that total SOC storage increased by the land use conversion from abandoned to cultivated lands, indicating that planting aquatic plants might be an effective method of preventing C loss from riparian ecosystems. The findings of this study provided insights into the changes in soil aggregates and soil C sequestration following the land use changes in riparian areas.
登录
查看更多内容
影响因子：
9.7
作者：
M. V. Gestel;R. Merckx;K. Vlassak
通讯作者：
M. V. Gestel;R. Merckx;K. Vlassak
影响因子：
2.9
作者：
M. Mikha;C. Rice
通讯作者：
M. Mikha;C. Rice
影响因子：
--
作者：
Wang Li
通讯作者：
Wang Li
影响因子：
2.9
作者：
C. Craft
通讯作者：
C. Craft
影响因子：
6.2
作者：
Fattet, M.;Fu, Y.;Stokes, A.
通讯作者：
Stokes, A.