微型蒸发器口径影响土壤蒸发测量值的试验研究  

Effects of Micro-lysimeter Diameters on Soil Evaporation Measurement

作　　者：高晓飞[1,2] 王晓岚[2] 

机构地区：[1]北京师范大学地表过程与资源生态国家重点实验室,北京100875 [2]北京师范大学地理学与遥感科学学院,北京100875

出　　处：《灌溉排水学报》2011年第1期1-4,共4页Journal of Irrigation and Drainage

基　　金：地表过程与资源生态国家重点实验室自由探索项目(2008-ZY-01);国家973计划项目(2007CB407204)

摘　　要：研究使用70、104、152和193 mm四种口径的微型蒸发器测定了室外裸土和室内裸土的土壤蒸发量。目的是考查蒸发器口径对土壤蒸发量测定值的影响。试验结果显示,在供水条件相同的情况下,70 mm口径微型蒸发器的测量值大于其他口径微型蒸发器的测量值,但在遮阴(室内)条件下,口径的影响会降低。原因可能是70 mm口径微型蒸发器受外部环境干扰较大。其他3种微型蒸发器的观测值具有极显著的相关关系,数值上差异也较少。研究认为,微型蒸发器的口径一般应在104 mm以上,但在遮阴(室内)条件下,70 mm口径的蒸发器也是可以满足要求的。Four types of micro-lysimeter of different diameters,including 70 mm,104 mm,152 mm,and 193 mm,were applied in soil evaporation measurement in filed and indoor.The purpose of this research was to explore the effects of micro-lysimeter diameter on the measured soil evaporation values.The results showed,in the same water condition,the evaporation recorded of 70 mm diameter micro-lysimeter was significantly higher than micro-lysimeters of other diameter;but the effects of diameter would be smaller in the overshadow condition.The possible reason of the effects was the disturbance of environment was biggest for 70 mm diameter micro-lysimeter than other types of micro-lysimeter.The correlations of the measured values of other three types of micro-lysimeter were significant;and the differences of the measured values were small.So,the diameter of micro-lysimeter should not smaller than 104 mm;and,this value might reduce to 70 mm in overshadow condition.

关 键 词：微型蒸发器 口径 裸土蒸发 

分 类 号：S152.73[农业科学—土壤学] S163.3[农业科学—农业基础科学]