AI Article Synopsis
- The Qinghai-Tibet Plateau is highly susceptible to climate change impacts and human activity, necessitating a study of soil nitrogen and sulfur cycles in Machin County.
- Soil nitrogen density ranged from 1.36 to 16.85 kg/m across three layers, while sulfur density varied from 0.37 to 4.61 kg/m, with significant influences from geological background, land use, and soil type.
- Future research should focus on tracking nitrogen and sulfur emissions, especially from areas with high external inputs and low fertility retention, to understand their cyclical roles in the environment.
Article Abstract
The Qinghai-Tibet Plateau is particularly vulnerable to the effects of climate change and disturbances caused by human activity. To better understand the interactions between soil nitrogen and sulfur cycles and human activities on the plateau, the distribution characteristics of soil nitrogen and sulfur density and their influencing factors for three soil layers in Machin County at depths of 0-20 cm, 0-100 cm, and 0-180 cm are discussed in this paper. The results indicated that at depths of 0-180 cm, soil nitrogen density in Machin County varied between 1.36 and 16.85 kg/m, while sulfur density ranged from 0.37 to 4.61 kg/m. The effects of three factors-geological background, land use status, and soil type-on soil nitrogen and sulfur density were all highly significant (p < 0.01). Specifically, natural factors such as soil type and geological background, along with anthropogenic factors including land use practices and grazing intensity, were identified as decisive in causing spatial variations in soil nitrogen and sulfur density. Machin County on the Tibetan Plateau exhibits natural nitrogen and sulfur sinks; However, it is crucial to monitor the emissions of NO and SO into the atmosphere from areas with high external nitrogen and sulfur inputs and low fertility retention capacities, such as bare land. On this basis, changes in the spatial and temporal scales of the nitrogen and sulfur cycles in soils and their source-sink relationships remain the focus of future research.
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| http://dx.doi.org/10.1007/s10653-024-02184-z | DOI Listing |
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