农业冻土冰含量测量方法试验研究  

作　　者：李松[1] 殷哲[2] 焉莉[3] 王鹏鹰 刘春慧[1] 姜玲 郭洪宇[1] 付辰琦[1] 

机构地区：[1]吉林农业大学工程技术学院,长春130118 [2]中国水利水电科学研究院,北京100000 [3]吉林农业大学资源与环境学院,长春130118

出　　处：《科技创新与应用》2024年第25期80-83,共4页Technology Innovation and Application

基　　金：吉林省教育厅项目(JJKH20220338KJ)。

摘　　要：农业冻土中的冰含量作为冻土冻融过程的关键变量之一,影响着土壤水分动态变化、土壤养分流失和农田生态环境维稳等。根据质量守恒原理和体积变换关系,自制一种农业冻土冰含量测量的试验装置,进行-20、-25、-30℃和土壤含水率为15.7%、23.5%、31.4%的冰含量测量试验。结果表明,农业冻土样品中冰含量随冻结温度降低冰质量含量增加。冻结温度达到-30℃时,冰质量含量达到一个恒定的峰值。相同冻结温度不同含水率状态下,冰质量含量百分比趋于一个平均值,且最大值和最小值之差约为2%。As one of the key variables in the freezing and thawing process of agricultural permafrost,the ice content in agricultural permafrost affects the dynamic change of soil moisture,the loss of soil nutrients and the stability of farmland ecological environment.According to the principle of mass conservation and volume transformation,a self-made experimental device for measuring ice content in agricultural frozen soil was made,and ice content measurements were carried out at-20,-25,and-30℃and soil moisture content of 15.7%,23.5%and 31.4%.The results show that the ice content in agricultural frozen soil samples increases with the decrease of freezing temperature.When the freezing temperature reaches-30℃,the mass content of ice reaches a constant peak.At the same freezing temperature and with different moisture content,the percentage of ice mass content tends to be an average,and the difference between the maximum value and the minimum value is about 2%.

关 键 词：农业 冻土 冰含量 测量 冻结温度 

分 类 号：S271[农业科学—农业水土工程]