东北农田黑土蒸发量与土壤水分及气象因子的关系  

Relationships between Evaporation of Arable Mollisol and Soil Moisture and Meteorological Factors in Northeast China

作　　者：徐庆华[1] 刘勇[1] 马履一[1] 王少华 侯炳柱 尹凤君 

机构地区：[1]省部共建森林培育与保护教育部重点实验室(北京林业大学),北京100083 [2]吉林市龙潭区江密峰林场

出　　处：《东北林业大学学报》2009年第11期82-83,95,共3页Journal of Northeast Forestry University

基　　金：国家"十一五"科技支撑项目(2006BAD24B01)

摘　　要：为准确地掌握东北农田黑土水分蒸发量的变化规律,2007年8月开始在吉林省吉林市龙潭区江密峰苗圃进行蒸发量测量试验,采用称质量法测量不同设置水分条件下农田黑土的昼夜蒸发量,并根据蒸发量与测量的气象因子建立了相应的回归方程。结果表明:土壤蒸发量与土壤含水量呈极显著正相关;土壤蒸发量在不同土壤含水量之间差异显著。通常情况下,土壤白天的蒸发量大约是夜间的12倍,全天蒸发量集中在11∶00—15∶00,占全天蒸发量的60%～70%。土壤蒸发量与光合有效辐射和风速呈显著的正相关,与其它气象因子相关关系不显著。An evaporation experiment was conducted to study the daily variation of evaporation on arable mollisol under different soil moisture conditions in Jiangmffeng Nursery of Longtan District, Jilin City in October 2007. Regressive equations between evaporation on arable mollisol and meteorological factors were established in terms of the evaporation for both day and night under different soil moisture conditions. Results showed that evaporation was positively correlated with soil moisture, and there was a significant difference in evaporation between different soil moisture levels. The evaporation for day was usually 12 times as much as that for night, and the peak of evaporation occurred between llam and 15 pm, accounting for 60% - 70% of the total. The evaporation of arable mollisol was positively related to photosynthetically active radiation and wind speed, but insignificantly related to other meteorological factors.

关 键 词：黑土 蒸发量 土壤含水量 气象因子 

分 类 号：S152.73[农业科学—土壤学]