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Analysis of Impact of Soil Freezing and Thawing Patterns on Agricultural Production in Jilin Province from 1961 to 2020
WANGmeiyu, LIZhonghui, WANGDongni, YUANFuxiang, RENJingquan, MUJia, GAOYan, LIUCong
Journal of Agriculture ›› 2026, Vol. 16 ›› Issue (10) : 78-82.
PDF(2914 KB)
PDF(2914 KB)
Analysis of Impact of Soil Freezing and Thawing Patterns on Agricultural Production in Jilin Province from 1961 to 2020
Frozen soil is a crucial factor affecting agricultural production in Jilin Province. Jilin Province is located in a seasonal frozen soil zone, and the soil begins to freeze in late autumn and early winter, followed by thawing in spring. The timing of soil thawing in spring coincides with key agricultural activities including soil tillage, spring plowing, and spring sowing of rice and corn, and a delayed soil thawing can postpone these critical agricultural activities. Under the long-term global climate change, the patterns of soil freezing and thawing will have corresponding changes. This study aims to clarify the variations in soil freezing-thawing patterns and their impacts on agricultural production under climate warming, in light of the seasonal soil freezing-thawing process in Jilin Province is highly coupled with spring and autumn farming activities. Based on the observational data of frozen soil, mean air temperature and 0 cm soil temperature from 49 meteorological stations in Jilin Province during 1961-2020, the spatiotemporal variation characteristics of initial soil freezing date, maximum frozen soil depth, topsoil thawing date and complete thawing date, and the seasonal and interdecadal variation characteristics of mean air temperature and 0 cm soil temperature across the province were systematically analyzed by mean value and standard deviation analysis. The results showed: (1) the initial soil freezing date had been delayed at a rate of 0.8 days per decade, and the average date was November 15 during 2011-2020, with spatial characteristics of later freezing in the east and south areas, and earlier in the west and north. (2) The maximum frozen soil depth had decreased at a rate of 10 cm per decade, being significantly shallower in the 2010s compared to the 1960s, with a greater pronounced reduction in the west than in the east. (3) The thawing date of topsoil had advanced at a rate of 1.0 days per decade, and the complete thawing date had advanced at 0.4 days per decade, averaging April 27 during 2011-2020. (4) Both air temperature and 0 cm soil temperature showed significant increasing trends, with the most prominent warming in winter (0 cm soil temperature rising at a rate of 1.4℃ per decade). In conclusion, climate warming has led to a pattern of “delayed freezing, shallower frozen depth and earlier thawing” in the soil freezing-thawing process in Jilin Province, which is generally conducive to the implementation of spring and autumn farming activities. However, the risks of increased pest and disease activity and insufficient soil moisture in arid areas, require attention. In the future, combined with soil moisture data and crop growth period models, the precise impacts of freezing-thawing patterns on different crops can be further refined, providing support for the refined regulation of agricultural production.
soil / freeze-thaw / spring plowing and spring sowing / agricultural production / climate change
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