[1]He Junqi,Bai Hanwei,Wang Jinquan,et al.Spatial Patterns and Driving Factors of Soil Nutrient Contents in Cultivated Lands Across Various Topographical Types in the Loess Plateau[J].Research of Soil and Water Conservation,2024,31(05):221-231.[doi:10.13869/j.cnki.rswc.2024.05.042]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 05
Page number:
221-231
Column:
Public date:
2024-08-10
- Title:
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Spatial Patterns and Driving Factors of Soil Nutrient Contents in Cultivated Lands Across Various Topographical Types in the Loess Plateau
- Author(s):
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He Junqi1,2,3, Bai Hanwei1,2,3, Wang Jinquan1,2,3, Xu Yiwei4, Ni Lili5
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(1.School of Water and Environmental, Chang'an University, Xi'an 710054, China; 2.Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China; 3.Key Laboratory of Ecological Hydrology and Water Security in Arid Areas, Ministry of Water Resources, Chang'an University, Xi'an 710054, China; 4.Shaanxi Science and Technology Exchange Center, Xi'an 710054, China; 5.Shaanxi Province Farmland Quality and......)
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- Keywords:
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soil nutrients; driving factors; geographic detector; geomorphic type; Loess Plateau
- CLC:
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S158.2
- DOI:
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10.13869/j.cnki.rswc.2024.05.042
- Abstract:
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[Objective]This study aims to comprehend the spatial distribution patterns of arable soil nutrients in various geomorphic conditions of the Loess Plateau, to unveil the driving factors behind these changes, and to provide the critical insights for precision management in the regional agriculture and the construction of agricultural projects. [Methods]Based on the 2020 soil nutrient data from the Loess Plateau in Shaanxi, the Kriging interpolation method was employed to analyze the spatial patterns of soil nutrients across four different geomorphic types. The driving factors behind these nutrient spatial variations was explored by using the geodetector model. [Results](1)In the Loess Plateau, spanning from the Great Wall's sandy lands, through the hilly and gully regions of northern Shaanxi, the loess table lands in northern of Weihe River, to the Guanzhong Plain, the average contents of soil organic matter(SOM), total nitrogen(TN), available phosphorus(AP), and available potassium(AK)exhibited a gradual increasing trend. Specifically, the SOM content averaged 10.20, 10.08, 15.28, and 18.78 g/kg, respectively, across these regions. TN averaged 0.63, 0.66, 0.98, and 1.19 g/kg. AP level averaged 12.99, 13.10, 16.97, and 27.24 mg/kg, and AK averaged 117.72, 149.94, 217.27, and 252.83 mg/kg, respectively. This trend indicated a consistent increase from the sandy lands to the plains.(2)In the loess area of Shaanxi, the duration of sunshine had most significant factor influencing overall nutrient contents, followed by annual temperature and fertilizer use. The distribution of nutrients in the windy area was predominantly affected by soil bulk density, whereas in the hilly and gully areas, plateau areas, and plains, fertilizer use was the primary influencing factor. The interaction of various factors provided a more comprehensive explanatory of nutrient dynamics than individual factor alone. [Conclusion]To optimize soil health, it is advisable to increase nutrient input and enhance soil fertility retention in sandy areas and hilly and gully areas. In contrast, the focus should be on improving nutrient utilization efficiency for plateau and plain areas. Additionally, in the process of farmland, it is crucial to tailor human activities to suit the environmental characteristics and specific conditions of different geomorphic regions.