The Change Characteristics and Interactions of Soil Moisture and Temperature in the Farmland in Wuchuan County, Inner Mongolia, China

Ziyuan Zhang,Jialin Wang,Yuying Pan,Zizhong Wang,Zhihua Pan,Jun Zhang,Feifei Pan,Guolin Han,Na Huang,Ruiqi Peng

doi:10.3390/atmos11050503

Ziyuan Zhang, Jialin Wang + Show 8 more

Open Access

https://doi.org/10.3390/atmos11050503

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Abstract

Soil moisture and temperature are both significant factors for crop growth and development. They are also the main influencing factors of regional climate change. In the context of climate change, the relationship between soil moisture and soil temperature is not only important for explaining the mechanism of moisture and temperature interaction, but also provides scientific suggestions for agricultural production. Since the accurate measurement of soil moisture and temperature is difficult, their relationship remains poorly understood. Here, based on real-time field observation in a potato field in Wuchuan County, Inner Mongolia, China, the change characteristics of soil moisture and temperature under different water level treatments were analyzed, and their relationships were disclosed. The results show that there was an inverse proportional relationship between soil moisture and temperature. With an increase of soil moisture, soil temperature decreased. The basic relation between soil moisture and temperature took the form of reciprocal functions (Q = 4.2 × 103 V × (0.2 + W) × ΔT). The decline of soil moisture in the farmland will increase the soil temperature and has a negative impact on land–atmosphere interactions. The results can provide important insight into regional climate change mechanisms.

Highlights

Soil moisture and temperature are the two most important variables for crop growth, development and yield formation, and their properties directly influence the relationship between soil and plant and determine the hydrological and biogeochemical processes occurring in soils [1,2]
China, this study aims to analyze the change characteristics of soil moisture and temperature, disclose the interaction between them, and evaluate the effects of soil water content change on soil temperature, agricultural production and climate change
The results showed that the change trend of soil moisture and temperature were in opposite direction, and the peak value of soil temperature corresponded to the valley value of soil moisture, and on the contrary, the valley value of soil temperature corresponded to the peak value of soil moisture

Summary

Introduction

Soil moisture and temperature are the two most important variables for crop growth, development and yield formation, and their properties directly influence the relationship between soil and plant and determine the hydrological and biogeochemical processes occurring in soils [1,2]. The effects of soil moisture and temperature on farmland ecosystems are important parts of research related to farmland microclimate [3,4], surface material migration [5,6,7] and energy conversion [8]. Soil temperature directly affects the maintenance and movement of water and gas [9] in soil and has a regular correspondence with crop growth functions such as root function and photosynthesis [10]. Soil temperature anomalies will seriously affect crop growth and development. Atmosphere 2020, 11, 503 vegetation and ecosystem zonal, and an important part of water cycles in terrestrial ecosystems and the basis for terrestrial plant survival.

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