Variation of soil organic carbon and physical properties in relation to land uses in the Yellow River Delta, China
| Autor: | Baishu Kong, Ye Li, Yongqiang Li, Shuying Jiao, Ziyun Xu, Junran Li, Yuwen Shen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Grassland ecology
Soil test Soil texture Science 010501 environmental sciences 01 natural sciences Article Soil retrogression and degradation 0105 earth and related environmental sciences Multidisciplinary Ecology Land use Forestry Wetlands ecology 04 agricultural and veterinary sciences Soil carbon Soil quality 040103 agronomy & agriculture Medicine 0401 agriculture forestry and fisheries Environmental science Soil horizon Arable land Agroecology |
| Zdroj: | Scientific Reports Scientific Reports, Vol 10, Iss 1, Pp 1-12 (2020) |
| ISSN: | 2045-2322 |
| Popis: | Soil physical properties and soil organic carbon (SOC) are considered as important factors of soil quality. Arable land, grassland, and forest land coexist in the saline-alkali reclamation area of the Yellow River Delta (YRD), China. Such different land uses strongly influence the services of ecosystem to induce soil degradation and carbon loss. The objective of this study is to evaluate the variation of soil texture, aggregates stability, and soil carbon affected by land uses. For each land use unit, we collected soil samples from five replicated plots from “S” shape soil profiles to the depth of 50 cm (0–5, 5–10, 10–20, 20–30, and 30–50 cm). The results showed that the grassland had the lowest overall sand content of 39.98–59.34% in the top 50 cm soil profile. The content of soil aggregates > 0.25 mm (R0.25), mean weight diameter and geometric mean diameter were significantly higher in grassland than those of the arable and forest land. R0.25, aggregate stability in arable land in the top 30 cm were higher than that of forest land, but lower in the soil profile below 20 cm, likely due to different root distribution and agricultural practices. The carbon management index (CMI) was considered as the most effective indicator of soil quality. The overall SOC content and CMI in arable land were almost the lowest among three land use types. In combination with SOC, CMI and soil physical properties, we argued that alfalfa grassland had the advantage to promote soil quality compared with arable land and forest land. This result shed light on the variations of soil properties influenced by land uses and the importance to conduct proper land use for the long-term sustainability of the saline-alkali reclamation region. |
| Databáze: | OpenAIRE |
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