NDLI: Impact of soil and water conservation on soil organic carbon content in a catchment of the middle Han River, China

Content Provider	Springer Nature Link
Author	Xu, Guoce Lu, Kexin Li, Zhanbin Li, Peng Wang, Tian Yang, Yuanyuan
Copyright Year	2015
Abstract	Soil organic carbon (SOC) is essential for improving soil quality, sustaining food production and quality, and maintaining water quality, as well as for mitigating climate change. Understanding the impact of soil and water conservation on SOC content is important for the protection of soil and water quality. In this study, the impacts of soil and water conservation on SOC content and density in a small catchment of the middle Han River were studied based on a grid soil survey. A total of 583 soil samples from 207 sites were collected, primarily from 30 m × 30 m grids. The results indicated that SOC content generally decreased with increasing soil depth, and significant differences existed among the three examined soil layers (0–20, 20–40, and 40–60 cm, p < 0.01). The mean SOC content of the different land use types occurred in the following order: forestland > terraces > grassland > sloping cropland. The spatial variability of SOC decreased as soil depth increased. The mean SOC densities of terraces, forestland, grassland, and sloping cropland at the 0–60 cm soil depth were 4.40, 4.31, 3.86, and 3.62 kg/m$^{2}$, respectively. The high-value zones of SOC density were always observed in the upper slope and basin outlet. SOC storage in the 0–60 cm soil depth was 565.10 tons in the Yujiehe catchment. Land use was the main influencing factor for SOC content in the catchment. Forestland, grassland, and terraces exhibit higher SOC than does sloping cropland. In conclusion, the use of terraces can greatly increase SOC density. Much sloping cropland can be changed to terraces, forestland, or grassland to increase SOC and protect soil and water quality in the water source area of the Han River.
Starting Page	6503
Ending Page	6510
Page Count	8
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	74
Issue Number	8
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-09-03
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Land use Soil organic carbon Terrace Soil and water conservation Han River Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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