为揭示蓄水坑灌不同灌水量对冬季土壤剖面温度分布的影响,采用HZR-8T温度传感器,对田间土壤剖面不同垂向和径向位置处的温度进行连续观测.结果表明,随着灌水量的增加,冻深减小,稳定冻结期缩短;土壤温度随时间的推移呈先降后升的趋势,温度变幅随着土深和灌水量的增加而趋于平缓;表层土壤在冻结阶段土温随灌水量的增加而升高,消融解冻阶段则相反;土壤剖面温度分布特征垂向上随土深增加而升高,径向上随坑壁距离的增加先升后降;冻结阶段坑壁位置低温范围随灌水量的增加而缩小,消融解冻阶段40 em以下土层高温范围随灌水量的增加而缩小.%In order to reveal the effects of different irrigation amount of water storage pit on soil temperature distribution in winter,the HZR-8T temperature sensor is used to observe soil temperature in different vertical and radial positions of soil profile.The results show that,(a) the freezing depth decreases and the stable freezing period shortens with the increase of irrigation amount;(b) the soil temperature decreases first and then rise with time,and the temperature fluctuation tends to decrease with the increases of soil depth and irrigation amount;(c) the temperature of surface soil inereases with the increase of irrigation amount in freezing process and decreases in thawing process;(d) the temperature distribution increases with the increase of soil depth along the vertical direction of soil profile,and increases first and then decrease with the increase of distance from the pit;(e) the low temperature range of pit wall in freezing process and the high temperature range of soil below 40 cm depth in thawing process are all narrowed with the increase of irrigation amount.
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