大别山北麓冬季土壤水分特征及对降水的响应  

Soil Moisture Characteristics in Winter and Its Response to Precipitation in the Northern Foothills of Dabie Mountains

作　　者：严啟蕾 高琳 张坤 张芊 戴方敏 朱莉 YAN Qi-lei;GAO Lin;ZHANG Kun(Huoshan County Meteorological Bureau,Huoshan,Anhui 237200;Lu’an City Mete-orological Bureau,Lu’an,Anhui 237000)

机构地区：[1]霍山县气象局,安徽霍山237200 [2]六安市气象局,安徽六安237000

出　　处：《安徽农业科学》2025年第5期181-184,222,共5页Journal of Anhui Agricultural Sciences

摘　　要：以大别山北麓霍山县冬季土壤水分为研究对象,探讨大别山北麓冬季土壤水分特征及对降水的响应,分析土壤相对湿度增量的影响因素。结果表明:土壤相对湿度在20 cm为最大,50 cm为最小,随降水增加各层土壤相对湿度逐渐增加。0.1 mm降水对土壤相对湿度无影响,1.2 mm降水可影响到30 cm土层土壤相对湿度,7.6 mm及以上降水可影响到50 cm深度土壤相对湿度;在固态降水和有积雪的情况下,40~50 cm土壤相对湿度增量大于10~30 cm。随着土层深度的加深,土壤相对湿度开始响应时间越滞后。土壤相对湿度增量受降水量、气温、降水历时、土壤初始相对湿度的影响;10~30 cm土壤相对湿度增量与气温呈正相关,40~50 cm土壤相对湿度增量与气温呈负相关,关系不显著;10~30 cm土壤相对湿度增量与土壤初始相对湿度呈显著负相关,随着土层深入相关系数随之降低。Taking the winter soil moisture in Huoshan County at the northern foothills of Dabie Mountains as the research object,the charac-teristics of winter soil moisture at the northern foothills of Dabie Mountains and its response to precipitation were explored,and the influencing factors of soil relative humidity increment were analyzed.The result showed that the relative humidity of the soil was highest at 20 cm and low-est at 50 cm,and gradually increased with the precipitation increase in each soil layer.0.1 mm precipitation had no effect on soil relative hu-midity,1.2 mm precipitation could affect soil relative humidity at 30 cm soil layer,and precipitation above 7.6 mm could affect soil relative humidity at 50 cm soil layer;in the case of solid precipitation and snow accumulation,the relative humidity increment of soil at 40-50 cm was greater than 10-30 cm.As the depth of the soil layer increased,the response time of soil relative humidity became more delayed.The soil rela-tive humidity increase was influenced by precipitation,temperature,precipitation duration and initial soil relative humidity.The relative hu-midity increment of 10-30 cm soil was positively correlated with temperature,the relative humidity increment of 40-50 cm soil was negatively correlated with temperature,but the relationship was not significant;the soil relative humidity increase of 10-30 cm was significantly negatively correlated with the initial soil relative humidity,and the correlation coefficient decreased as the soil layer deepens.

关 键 词：土壤相对湿度 变化特征 冬季降水 响应 大别山北麓 

分 类 号：S162[农业科学—农业气象学]