松嫩草原几种主要禾草植物群落水分生态的比较研究  

Water Balance Characteristics of Some Grass Communities in Songnen Grassland

作　　者：王仁忠[1] 

机构地区：[1]东北师范大学国家草地生态工程实验室

出　　处：《草业学报》1998年第1期6-11,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ＣａｍｐｂｅｌＣＲ１０ｄａｔａｌｏｇｇｅｒ自动气象设备，研究了松嫩草原羊草、星星草、朝鲜碱茅和虎尾草４种主要禾草植物群落的水分生态状况。结果表明，在生长季晴天条件下，４种群落的蒸腾速率基本为双峰曲线，但同一时期各群落间及不同时期同一群落的蒸腾速率差异显著。在影响群落蒸腾速率的诸多因子中，太阳辐射强度为主导因子，其与群落蒸腾速率的相关关系最密切。在生长季，４种群落中只有虎尾草群落水分有盈余，其他３个群落均有严重的水分亏缺，其中以羊草群落的水分亏缺最多。严重水分亏缺将影响这些牧草的大面积种植。The ecological characteristics of water balance in plants were studied on Songnen grassland for four major grass communities, these were Leymus chinensis, Puccinellia tenuiflora, Puccinellia chinampoensis and Chloris virgata. A set of self-made lysimeters and a Campbell CR10 datalogger were employed in the study. The results showed that the diurnal variation in plant transpiration rate was characterised by a curve with twin peaks for all the four grass communities, but it varied significantly among them and between different months. The most significant factor influencing the rate of transpiration was, among many others, solar radiation. All the three communities other than Chloris virgata suffered a serious water deficit in the growing season, with the most serious for Leymus chinensis. It is needed in planning a large-area plantation of these species to consider water deficit an important limiting factor.

关 键 词：禾草植物群落 水分生态 松嫩草原 

分 类 号：S812.3[农业科学—草业科学]