霸王、沙木蓼和银水牛果在不同水分条件下的生理研究

Study on Physiological Characteristics of Zygophyllum xanthoxylum,Atraphaxis mandshurica,Shepher.dia argentea Species under Different Soil Water

简单分析了霸王、银水牛果和沙木蓼在不同土壤水分条件下,净光合速率(Pn)、蒸腾速率(Tr)、水分利用效率(WUE)的变化规律;霸王、银水牛果和沙木蓼的最适于光合作用的土壤含水量分别为18.50%、17.62%和19.30%;最适于蒸腾作用的土壤含水量分别为15.08%、21.63%和19.21%。光饱和点分别为41.7 KLux、51.4 KLux和55.6 KLux。从而证明3树种为耐旱性树种,其中沙木蓼的抗旱性最高,且耐贫瘠,霸王居中,银水牛果最低。

The change laws of net photosynthetic rate （Pn）, transpiration rate （Tr）, water use efficiency （WUE） of Zygophyllum xanthoxylum, Atraphaxis mandshurica,Shepher, dia argentea species under soil water were analysed. The test showed that 18.50 percent, 17.62 percent, 19.30 percent of soil moisture content is respectively available for maximum photosynthetic rate of Zygophyllum xanthoxylum, Atraphaxis mandshurica,Shepher, dia argentea species. And 15.08 percent, 21.63 percent, 19.21 percent respectively for efficiency transpiration for them. Light saturation point is 41.7 KLux,51.4 KLux and 55.6 KLux, respectively. The experiment also indicaeted that three species were resistant to drought, the order was： Atraphaxis mandshurica〉Zygophyllum xanthoxylum〉Shepher, dia argentea.