松嫩草原羊草群落水分生态的研究  

The Water Ecology of Leymus chinensis Community in Shongnen Plain

作　　者：王仁忠[1,2,1] 高琼[1,2,1] 李建东[1,2,1] 

机构地区：[1]东北师范大学国家草地生态工程实验室 [2]中国科学院植物研究所

出　　处：《草业学报》1996年第3期7-12,共6页Acta Prataculturae Sinica

基　　金：国家自然科学基金

摘　　要：采用自行设计的蒸散仪和加拿大产自动气象设备，研究了松嫩草原羊草群落的水分生态问题，结果表明，生长季晴天条件下，羊草群落的蒸散、蒸腾速率的日变化基本呈双峰曲线，但不同月份差异显著。环境因子对群落蒸腾作用的影响是综合性的，其中太阳辐射为主导因子，并与群落的蒸腾速率呈极显著相关。温度、相对湿度、土壤含水率的日变化与群落蒸腾速率的日变化相关关系均不明显。降水量、蒸散量、土壤含水量和植物含水量构成土壤—羊草群落—大气系统水分循环的主体。生长季，由于羊草群落蒸散量远大于降水量。出现水分严重亏缺。Evapotranspiration (ET) and transpiration (Tr) of Leymus chinensis community were recorded by using artificial lysimeters in growing season in Shongnen plain, together with climate data, such as air temperature, air relative humidity, radiation, wind speed, soil moisture and plant water contain. The results showed that the curves of diurnal variation of ET and Tr of L. chinensis community were double-peak type, but varied significantly in different months. The influence of environmental factors on Tr was comprehensive and solar radiation played a leading role. The correlations of air temperature, RH, and soil moisture over Tr weren't significant. The precipitation, ET, soil water storage and Canopy water storage were main parts of soil-vegetation-air water flow system in Shongnen plain. As the precipitation was much less than ET, water deficit was very serious in growing season in 1992.

关 键 词：羊草 群落 水分生态 松嫩草原 

分 类 号：S543.901[农业科学—作物学] S812.3