丘陵赤红壤蒸散量的变化特征及计算模型  

Variation characteristics and calculation model of evapotranspiration in latored soils on hills

作　　者：郭庆荣[1] 张秉刚[1] 钟继洪[1] 谭军[1] 骆伯胜[1] 黄湘兰[1] 

机构地区：[1]广东省生态环境与土壤研究所,广州510650

出　　处：《应用生态学报》2003年第4期512-514,共3页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目 ( 493710 35 );广东省重大专项 ( 2 0 6A;2 0 0 10 2 5 80 ) .广东省自然科学基金 ( 970 386 );国家人事部非教育系统留学回国人员科技活动择优资助项目;广东省农业环境综合治理重点实验室资助项目

摘　　要：分析了南亚热带丘陵赤红壤区蒸散量的动态变化特征 .结果表明 ,蒸散量存在年际变化和显著的季节性变化 ,月蒸散量最大值是最小值的 10 .80～ 15 .41倍 ,湿季期 ( 3～ 9月 ) ,蒸散量约占年蒸散总量的77% ,旱季期 ( 10月～次年 2月 ) ,蒸散量约占年蒸散总量的 2 3 % .揭示了南亚热带丘陵赤红壤区年降雨总量、3～ 9月的降雨量足以满足蒸散的需求 ,而 10月～次年 2月的降雨量不足以满足蒸散的需求 ,蒸散将消耗土壤水库贮水的规律 .以修正的彭曼公式为基础 ,建立了南亚热带丘陵赤红壤区蒸散量的计算模型 .通过试验实测值与模型计算值的比较 ,证明计算模型的可靠性程度是非常满意的 .The dynamic characteristics of evapotranspiration in latored soil on hills of subtropics regions in south China was analyzed. The results showed that evapotranspiration presented annual and seasonal fluctuations. The maximum monthly evapotranspiration was 10.80～15.41 times of the monthly minimum. The evapotranspiration in wet season (March to September) accounted for about 77% of annual total evapotranspiration, and that in dry season (October to February of next year) accounted for about 23%. Although the amount of annual rainfalls could balance annual total evapotranspiration, rainfalls were insufficient for evapotranspiration in the dry season, and soil water could be depleted by evapotranspiration. Based on the modified Penman equation, the calculation model of evapotranspiration in latored soil on hills of subtropics regions in south China was set up. By comparing modeling results with experimental data, it was proved that the calculation model was very reliable.

关 键 词：丘陵赤红壤 蒸散量 计算模型 季节性变化 

分 类 号：S152.7[农业科学—土壤学]