{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T22:16:23Z","timestamp":1787955383281,"version":"build-2784847793"},"reference-count":38,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2024,7,21]],"date-time":"2024-07-21T00:00:00Z","timestamp":1721520000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100013805","name":"Shanxi Agricultural University Doctoral Research Start-Up Fund","doi-asserted-by":"publisher","award":["2023BQ06"],"award-info":[{"award-number":["2023BQ06"]}],"id":[{"id":"10.13039\/501100013805","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100013805","name":"Shanxi Agricultural University Doctoral Research Start-Up Fund","doi-asserted-by":"publisher","award":["202103021223132"],"award-info":[{"award-number":["202103021223132"]}],"id":[{"id":"10.13039\/501100013805","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100013805","name":"Shanxi Agricultural University Doctoral Research Start-Up Fund","doi-asserted-by":"publisher","award":["202103021224151"],"award-info":[{"award-number":["202103021224151"]}],"id":[{"id":"10.13039\/501100013805","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100013805","name":"Shanxi Agricultural University Doctoral Research Start-Up Fund","doi-asserted-by":"publisher","award":["42207102"],"award-info":[{"award-number":["42207102"]}],"id":[{"id":"10.13039\/501100013805","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Upper-Level Project of the Shanxi Natural Science Foundation of China","award":["2023BQ06"],"award-info":[{"award-number":["2023BQ06"]}]},{"name":"Upper-Level Project of the Shanxi Natural Science Foundation of China","award":["202103021223132"],"award-info":[{"award-number":["202103021223132"]}]},{"name":"Upper-Level Project of the Shanxi Natural Science Foundation of China","award":["202103021224151"],"award-info":[{"award-number":["202103021224151"]}]},{"name":"Upper-Level Project of the Shanxi Natural Science Foundation of China","award":["42207102"],"award-info":[{"award-number":["42207102"]}]},{"name":"Youth Fund of National Natural Science in China","award":["2023BQ06"],"award-info":[{"award-number":["2023BQ06"]}]},{"name":"Youth Fund of National Natural Science in China","award":["202103021223132"],"award-info":[{"award-number":["202103021223132"]}]},{"name":"Youth Fund of National Natural Science in China","award":["202103021224151"],"award-info":[{"award-number":["202103021224151"]}]},{"name":"Youth Fund of National Natural Science in China","award":["42207102"],"award-info":[{"award-number":["42207102"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The food crisis has increased demand for agricultural resources due to various factors such as extreme weather, energy crises, and conflicts. A solar greenhouse enables counter-seasonal winter cultivation due to its thermal insulation, thus alleviating the food crisis. The root temperature is of critical importance, although the mechanism of soil thermal environment change remains uncertain. This paper presents a comprehensive study of the soil thermal environment of a solar greenhouse in Jinzhong City, Shanxi Province, employing a variety of analytical techniques, including theoretical, experimental, and numerical simulation, and deep learning modelling. The results of this study demonstrate the following: During the overwintering period, the thermal environment of the solar greenhouse floor was divided into a low-temperature zone, a constant-temperature zone, and a high-temperature zone; the distance between the low-temperature boundary and the southern foot was 2.6 m. The lowest temperature in the low-temperature zone was 11.06 \u00b0C and the highest was 19.05 \u00b0C. The floor in the low-temperature zone had to be heated; the lowest value of the constant-temperature zone was 18.29 \u00b0C, without heating. The minimum distance between the area of high temperature and the southern foot of the solar greenhouse was 8 m and the lowest temperature reading was 19.29 \u00b0C. The indoor soil temperature tended to stabilise at a depth of 45 cm, and the lowest temperature reading at a horizontal distance of 1400 mm from the south foot was 19.5 \u00b0C. The Fluent and LSTM models fitted well and the models can be used to help control soil temperature during overwintering in extreme climates. The research can provide theoretical and data support for the crop areas and the heating of pipelines in the solar greenhouse.<\/jats:p>","DOI":"10.3390\/s24144730","type":"journal-article","created":{"date-parts":[[2024,7,22]],"date-time":"2024-07-22T14:45:53Z","timestamp":1721659553000},"page":"4730","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Soil Marginal Effect and LSTM Model in Chinese Solar Greenhouse"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7971-0181","authenticated-orcid":false,"given":"Weiwei","family":"Cheng","sequence":"first","affiliation":[{"name":"College of Urban and Rural Construction, Shanxi Agricultural University, No.1, Mingxian South Road, Taigu District, Jinzhong 030801, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Changchao","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Agricultural Engineering, Shanxi Agricultural University, No.1, Mingxian South Road, Taigu District, Jinzhong 030801, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Agricultural Engineering, Shanxi Agricultural University, No.1, Mingxian South Road, Taigu District, Jinzhong 030801, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lirong","family":"Hao","sequence":"additional","affiliation":[{"name":"College of Agricultural Engineering, Shanxi Agricultural University, No.1, Mingxian South Road, Taigu District, Jinzhong 030801, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-5308-9606","authenticated-orcid":false,"given":"Zhonghua","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Urban and Rural Construction, Shanxi Agricultural University, No.1, Mingxian South Road, Taigu District, Jinzhong 030801, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingliang","family":"Cui","sequence":"additional","affiliation":[{"name":"College of Agricultural Engineering, Shanxi Agricultural University, No.1, Mingxian South Road, Taigu District, Jinzhong 030801, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,21]]},"reference":[{"key":"ref_1","unstructured":"World Food Program (2023). Food Security Information Network. Global Report on Food Crisis 2023, World Food Program."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1255","DOI":"10.1016\/j.renene.2019.06.090","article-title":"Optimal design for solar greenhouses based on climate conditions","volume":"145","author":"Esmaeli","year":"2020","journal-title":"Renew. Energy"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"312","DOI":"10.1016\/j.solener.2022.11.030","article-title":"Analytic model for calculation of soil temperature and heat balance of bare soil surface in solar greenhouse","volume":"249","author":"Deng","year":"2023","journal-title":"Sol. Energy"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"122953","DOI":"10.1016\/j.energy.2021.122953","article-title":"New insights of designing thermal insulation and heat storage of Chinese solar greenhouse in high latitudes and cold regions","volume":"242","author":"Liu","year":"2022","journal-title":"Energy"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1016\/j.solener.2019.08.042","article-title":"Review on greenhouse microclimate and application: Design parameters, thermal modeling and simulation, climate controlling technologies","volume":"191","author":"Choab","year":"2019","journal-title":"Sol. Energy"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"108261","DOI":"10.1016\/j.compag.2023.108261","article-title":"Multistep ahead prediction of temperature and humidity in solar greenhouse based on FAM-LSTM model","volume":"213","author":"Yang","year":"2023","journal-title":"Comput. Electron. Agric."},{"key":"ref_7","first-page":"279","article-title":"Application of dynamic model to predict some inside environment variables in a semi-solar greenhouse","volume":"5","author":"Mohammadi","year":"2018","journal-title":"Inf. Process. Agric."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"102682","DOI":"10.1016\/j.jobe.2021.102682","article-title":"A novel approach for solar greenhouse air temperature and heating load prediction based on Laplace transform","volume":"44","author":"Huang","year":"2021","journal-title":"J. Build. Eng."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1016\/j.inffus.2017.11.001","article-title":"Collaborative fusion estimation over wireless sensor networks for monitoring CO2 concentration in a greenhouse","volume":"42","author":"Bai","year":"2018","journal-title":"Inf. Fusion"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Martzopoulou, A., Vafiadis, D., and Fragos, P.V. (2020). Energy Gain in Passive Solar Greenhouses Due to CO2 Enrichment. Energies, 13.","DOI":"10.3390\/en13051242"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"318","DOI":"10.1016\/j.solener.2019.11.070","article-title":"The effect of temperature and light on strawberry production in a solar greenhouse","volume":"195","author":"Tang","year":"2020","journal-title":"Sol. Energy"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"126966","DOI":"10.1016\/j.energy.2023.126966","article-title":"Light environment simulation for a three-span plastic greenhouse based on greenhouse light environment simulation software","volume":"271","author":"Bo","year":"2023","journal-title":"Energy"},{"key":"ref_13","unstructured":"Pan, R. (2008). Plant Physiology, Higher Education Press. [6th ed.]. (In Chinese)."},{"key":"ref_14","first-page":"375","article-title":"Experimental study on soil temperature field of soil-air heat exchanger in solar greenhouse","volume":"42","author":"Li","year":"2021","journal-title":"J. Sol. Energy"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1793","DOI":"10.1007\/s12040-014-0509-x","article-title":"Estimation of soil moisture and its effect on soil thermal characteristics at Astronomical Observatory, Thiruvananthapuram, south Kerala","volume":"123","author":"Roxy","year":"2014","journal-title":"J. Earth Syst. Sci."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1016\/j.agrformet.2016.03.004","article-title":"Assumptions for Fourier-based modelling of diurnal temperature variations in the top soil layer under Istebna spruce stands","volume":"222","author":"Sypka","year":"2016","journal-title":"Agric. For. Meteorol."},{"key":"ref_17","first-page":"152","article-title":"Validation of the daily variation rule of ground temperature and its harmonic simulation in Liaoshen type I solar greenhouse","volume":"19","author":"Li","year":"2010","journal-title":"Northwest J. Agric."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1016\/j.geoderma.2018.03.022","article-title":"The functions of soil water and heat transfer to the environment and associated response mechanisms under different snow cover conditions","volume":"325","author":"Fu","year":"2018","journal-title":"Geoderma"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"127193","DOI":"10.1016\/j.energy.2023.127193","article-title":"A systematic analysis of multiple structural parameters of Chinese solar greenhouse based on the thermal performance","volume":"273","author":"Wu","year":"2023","journal-title":"Energy"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"279","DOI":"10.3390\/cli2040279","article-title":"A Study of the Relations between Soil Moisture, Soil Temperatures and Surface Temperatures Using ARM Observations and Offline CLM4 Simulations","volume":"2","author":"Jin","year":"2014","journal-title":"Climate"},{"key":"ref_21","first-page":"36","article-title":"Influence of soil moisture content on the growth and yield of tomato in autumn and winter in solar greenhouses","volume":"53","author":"Yu","year":"2022","journal-title":"J. Northeast Agric. Univ."},{"key":"ref_22","first-page":"102","article-title":"Effect of soil temperature on soil moisture content in solar greenhouse","volume":"24","author":"Saiyinchaogetu","year":"2019","journal-title":"J. China Agric. Univ."},{"key":"ref_23","first-page":"175","article-title":"Soil hydrothermal experiment and simulation of different insulation structures on the south side of double-film solar greenhouse in cold and arid area","volume":"27","author":"Zhang","year":"2022","journal-title":"J. China Agric. Univ."},{"key":"ref_24","first-page":"150","article-title":"Marginal effect of the soil temperature environment in greenhouse","volume":"25","author":"Sun","year":"2009","journal-title":"Trans. Chin. Soc. Agric. Eng."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"25","DOI":"10.3390\/en12010025","article-title":"Heat transfer model to predict temperature distribution in the ground","volume":"12","author":"Barbara","year":"2018","journal-title":"Energies"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"379","DOI":"10.1016\/j.geothermics.2014.08.001","article-title":"New correlations for the prediction of the undisturbed ground temperature","volume":"53","author":"Ouzzane","year":"2015","journal-title":"Geothermics"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"56","DOI":"10.1016\/j.enbuild.2016.05.047","article-title":"The application of energy balance at the bare soil surface to predict annual soil temperature distribution","volume":"127","author":"Staniec","year":"2016","journal-title":"Energy Build."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"110946","DOI":"10.1016\/j.enbuild.2021.110946","article-title":"Prediction of the temperature profiles for shallow ground in cold region and cold winter hot summer region of China","volume":"242","author":"Tong","year":"2021","journal-title":"Energy Build."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"104513","DOI":"10.1016\/j.still.2019.104513","article-title":"Developing novel hybrid models for estimation of daily soil temperature at various depths","volume":"197","author":"Mehdizadeh","year":"2020","journal-title":"Soil Tillage Res."},{"key":"ref_30","first-page":"108","article-title":"Non-steady state thermal conductivity process of soil at night in a down-dug solar greenhouse","volume":"24","author":"Zhang","year":"2019","journal-title":"J. China Agric. Univ."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/0038-092X(60)90062-1","article-title":"The relationship and characteristics distribution of direct diffuse and total radiation","volume":"4","author":"Liu","year":"1960","journal-title":"Sol. Energy"},{"key":"ref_32","first-page":"513","article-title":"Research on the construction of light radiation environment model for solar greenhouse","volume":"44","author":"Ma","year":"2013","journal-title":"J. Shenyang Agric. Univ."},{"key":"ref_33","unstructured":"(2016). Good supply Practice for Pharmaceutical Products, China Chemical Industry Press."},{"key":"ref_34","first-page":"160","article-title":"Establishment and application of solar radiation model in solar greenhouse","volume":"35","author":"Xu","year":"2019","journal-title":"Trans. Chin. Soc. Agric. Eng. (Trans. CSAE)"},{"key":"ref_35","first-page":"235","article-title":"Characteristics of soil temperature change in the southern margin area of sunken solar greenhouse","volume":"28","author":"Wang","year":"2012","journal-title":"Trans. Chin. Soc. Agric. Eng. (Trans. CSAE)"},{"key":"ref_36","first-page":"1","article-title":"Optimum temperature for vegetation growth on different land cover types","volume":"16","author":"Liu","year":"2014","journal-title":"J. Geo-Inf. Sci."},{"key":"ref_37","unstructured":"Zhang, Y. Effect of Low Temperature in Root Zone on Photosynthesis and Root Growth of Tomato Seedlings."},{"key":"ref_38","first-page":"583","article-title":"Effects of low temperature stress on root vigour and osmoregulatory substances in melon seedlings","volume":"26","author":"He","year":"2008","journal-title":"J. Shihezi Univ. (Nat. Sci. Ed.)"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/14\/4730\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T15:20:40Z","timestamp":1760109640000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/14\/4730"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,7,21]]},"references-count":38,"journal-issue":{"issue":"14","published-online":{"date-parts":[[2024,7]]}},"alternative-id":["s24144730"],"URL":"https:\/\/doi.org\/10.3390\/s24144730","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,7,21]]}}}