黄土半干旱区不同土壤水分下核桃的蒸腾速率研究  

Study on Transpiration Rate of Walnut under Different Soil Water Content in Semi-Arid Region Loess Plateau

作　　者：黄春霞[1] 郭建斌[1] 梁月[1] 

机构地区：[1]水土保持与荒漠化防治教育部重点实验室北京林业大学水土保持学院,北京100083

出　　处：《四川林勘设计》2007年第4期6-8,共3页Sichuan Forestry Exploration and Design

基　　金：北京林业大学研究生自选课题资助基金(05jj021)资助

摘　　要：文章以黄土半干旱区的主要经济树种核桃为研究对象,研究了核桃苗木在不同土壤水分条件下蒸腾速率与外界因子(光照和水分)和内部因子(叶水势和气孔阻力)之间的关系,建立蒸腾速率与各因子之间的关系方程。研究结果表明,在土壤含水量临近15%时,蒸腾速率主要受土壤水分的影响,因此,可考虑在此范围对蒸腾速率进行调控,以提高林木的水分利用效率。Walnut is one of the most region loess plateau. This paper important economic trees in semi--arid studied the relationship between the transpiration rate of walnut seedlings and the outside factors （sunshine and water） and the inside factors （leaf water potential and stomatal resistance）. Then it made the equations of the transpiration rate and the factors. The results indicated that the transpiration rate was mostly affected by the soil water content when it was about 15 %. So that, the transpiration can be controlled in order to enhance the water utilization efficiency of plants.

关 键 词：核桃 土壤水分 蒸腾速率 

分 类 号：S644.2[农业科学—蔬菜学]