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Effects of Land Use Conversion from Upland Field to Paddy Field on Soil Temperature Dynamics and Heat Transfer Processes

文献类型：期刊论文

作者Yi, Jun1,2; Xu, Mengyi1; Ren, Qian1; Zhang, Hailin1; Liu, Muxing1; Fei, Yuanhang1; Li, Shenglong1; Nie, Hanjiang1; Li, Qi1; Ni, Xin1
刊名LAND
出版日期2025-06-26
卷号14期号:7页码:1352
关键词soil temperature soil thermal properties soil heat flux soil water content upland field new paddy field
DOI10.3390/land14071352
产权排序3
文献子类Article
英文摘要Investigating soil temperature and the heat transfer process is essential for understanding water-heat changes and energy balance in farmland. The conversion from upland fields (UFs) to paddy fields (PFs) alters the land cover, irrigation regimes, and soil properties, leading to differences in soil temperature, thermal properties, and heat fluxes. Our study aimed to quantify the effects of converting UFs to PFs on soil temperature and heat transfer processes, and to elucidate its underlying mechanisms. A long-term cultivated UF and a newly developed PF (converted from a UF in May 2015) were selected for this study. Soil water content (SWC) and temperature were monitored hourly over two years (June 2017 to June 2019) in five soil horizons (i.e., 10, 20, 40, 60, and 90 cm) at both fields. The mean soil temperature differences between the UF and PF at each depth on the annual scale varied from -0.1 to 0.4 degrees C, while they fluctuated more significantly on the seasonal (-0.9 similar to 1.8 degrees C), monthly (-1.5 similar to 2.5 degrees C), daily (-5.6 similar to 4.9 degrees C), and hourly (-7.3 similar to 11.3 degrees C) scales. The SWC in the PF was significantly higher than that in the UF, primarily due to differences in tillage practices, which resulted in a narrower range of soil temperature variation in the PF. Additionally, the SWC and soil physicochemical properties significantly altered the soil's thermal properties. Compared with the UF, the volumetric heat capacity (C-s) at the depths of 10, 20, 40, 60, and 90 cm in the PF changed by 8.6%, 19.0%, 5.5%, -4.3%, and -2.9%, respectively. Meanwhile, the thermal conductivity (lambda(theta)) increased by 1.5%, 18.3%, 19.0%, 9.0%, and 25.6%, respectively. Moreover, after conversion from the UF to the PF, the heat transfer direction changed from downward to upward in the 10-20 cm soil layer, resulting in a 42.9% reduction in the annual average soil heat flux (G). Furthermore, the differences in G between the UF and PF were most significant in the summer (101.9%) and most minor in the winter (12.2%), respectively. The conversion of the UF to the PF increased the C-s and lambda(theta), ultimately reducing the range of soil temperature variation and changing the direction of heat transfer, which led to more heat release from the soil. This study reveals the effects of farmland use type conversion on regional land surface energy balance, providing theoretical underpinnings for optimizing agricultural ecosystem management.
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WOS关键词THERMAL-PROPERTIES ; BIOCHAR ; WATER ; FLUXES
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001537227100001
出版者MDPI
源URL[http://ir.igsnrr.ac.cn/handle/311030/215595]  
专题区域可持续发展分析与模拟院重点实验室_外文论文
通讯作者Zhang, Hailin; Wang, Yongsheng
作者单位1.Cent China Normal Univ, Hubei Prov Key Lab Geog Proc Anal & Simulat, Wuhan 430079, Peoples R China;
2.Minist Educ, Engn Res Ctr Photoenergy Utilizat Pollut Control &, Wuhan 430079, Peoples R China;
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Yi, Jun,Xu, Mengyi,Ren, Qian,et al. Effects of Land Use Conversion from Upland Field to Paddy Field on Soil Temperature Dynamics and Heat Transfer Processes[J]. LAND,2025,14(7):1352.
APA Yi, Jun.,Xu, Mengyi.,Ren, Qian.,Zhang, Hailin.,Liu, Muxing.,...&Wang, Yongsheng.(2025).Effects of Land Use Conversion from Upland Field to Paddy Field on Soil Temperature Dynamics and Heat Transfer Processes.LAND,14(7),1352.
MLA Yi, Jun,et al."Effects of Land Use Conversion from Upland Field to Paddy Field on Soil Temperature Dynamics and Heat Transfer Processes".LAND 14.7(2025):1352.

入库方式： OAI收割

来源：地理科学与资源研究所

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