呼和浩特地区土壤浅层温度变化特征及影响因素研究  

Characteristics and Influencing Factors of Shallow Soil Temperature Changes in Hohhot Area

作　　者：刘星岑 LIU Xingcen(Hohhot Meteorological Bureau,Hohhot 010020,China)

机构地区：[1]呼和浩特市气象局,内蒙古呼和浩特010020

出　　处：《林业调查规划》2023年第2期46-51,共6页Forest Inventory and Planning

基　　金：国家自然基金青年基金(41907082);内蒙古自然基金博士基金(2019BS04005)。

摘　　要：地温是表征气候变化的主要气象要素之一,研究地温的变化特征有助于揭示地温对农业生产和生态环境的影响。利用呼和浩特地区1961—2020年生长季(4—9月) 5 cm、10 cm、15 cm、20 cm浅层地温观测数据,分析其土壤浅层温度的时间变化趋势,地温随土层深度的变化特征以及地温变化与气温、降雨量的关系。结果表明,呼和浩特地区生长季各浅层地温呈显著增温趋势,增幅为0.263~0.561℃/10 a,其中4月增幅最大;生长季地温随土层深度增加而下降。回归分析显示,浅层地温与气温、降雨量呈正相关关系,气温对浅层地温变化的解释贡献率为78%~85.91%,且达到极显著水平(P<0.001);降雨量对浅层地温变化的解释贡献率为3.72%~11.54%。多元回归分析显示,气温与土壤浅层地温的关系比降雨量更加密切,更能直接影响浅层地温的变化。Soil temperature is one of the main meteorological factors that characterize climate change.Studying the characteristics of soil temperature changes can help reveal the impact of soil temperature on agricultural production and ecological environment.Based on the 5 cm,10 cm,15 cm and 20 cm shallow soil temperature observation data in Hohhot during the growing season(from April to September)from 1961 to 2020,this paper analyzed the temporal change trend of shallow soil temperature in Hohhot area,the characteristics of soil temperature changes with soil depth,and the relationship between soil temperature changes and air temperature or rainfall.The results showed that the average soil temperature of each shallow layer in Hohhot area during the growing season showed a significant warming trend,with an increase of 0.263-0.561℃/10 a and the largest increase in April.The soil temperature decreased with the increase of soil depth during the growing season.The regression analysis showed that the shallow soil temperature was positively correlated with air temperature and rainfall,and the explanation contribution rate of temperature to shallow soil temperature changes was 78%-85.91%,reaching a very significant level(P<0.001);the explanation contribution rate of rainfall to shallow soil temperature changes was 3.72%-11.54%.The multiple regression analysis showed that the relationship between air temperature and shallow soil temperature was closer than rainfall,which could directly affect the change of shallow soil temperature.

关 键 词：浅层地温变化 回归分析 生长季 呼和浩特地区 

分 类 号：S714.5[农业科学—林学] S152.8