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当前位置: 首页 > 文章 > 不同矿化度微咸水灌溉条件下柽柳的耗水规律试验研究 节水灌溉 2012 (7) 14-17
Position: Home > Articles > Experimental Study on Water Consumption Rule of Tamarxi Ramossisima under Brackish Water Irrigation with Different Mineralization Degree Water Saving Irrigation 2012 (7) 14-17

不同矿化度微咸水灌溉条件下柽柳的耗水规律试验研究

作  者：
郭永昌
单  位：
新疆生产建设兵团农十师勘测设计院
关键词：
微咸水;柽柳;光合作用;耗水规律
摘  要：
通过测坑试验,以准噶尔盆地南缘地区典型的荒漠植被柽柳为研究对象,对柽柳生长期内在不同矿化度微咸水灌溉水平下的耗水生长过程、形态变化、叶片水分生理特性等进行了较系统的试验研究,得出:①柽柳在土壤含水率为田间持水率的45%～50%时,矿化度为6g/L的微咸水灌溉条件下,柽柳仍能够维持生长,且该条件下柽柳的分枝数、枝长、冠幅等指标与较低矿化度条件下柽柳的相应指标相比,下降幅度在15%～30%之间;②分析柽柳的水分生理特性,通过叶片蒸腾速率、光合速率、气孔导度以及水分利用效率的日变化曲线,得出:柽柳在矿化度为3g/L时,其蒸腾速率、光合速率等是最高的,其后矿化度增大,光合作用减弱。柽柳属于低蒸腾、低光合沙生植物,叶片水分利用效率在上午的水分效率较高,而自中午之后一直维持在一个相对较低的水平。
译  名：
Experimental Study on Water Consumption Rule of Tamarxi Ramossisima under Brackish Water Irrigation with Different Mineralization Degree
作  者：
GUO Yong-chang(Division 10 Hydroelectric Investigation and Design Institute, Production and Construction Corps of Xinjiang,Beitun,Xinjiang 836000)
关键词：
brackish water;Tamarxi ramossisima;photosynthesis;water consumption
摘  要：
In this paper,pit test method is adopted and the typical desert vegetation Tamarxi ramossisima in the southern margin of the Junggar Basin is taken as study object to explore the water consumption,morphological changes,physiological characteristics and leaf water distribution characteristics of Tamarxi ramossisima in the growth period under Brackish Water Irrigation with Different Mineralization Degree.The main results are as follow:①when the soil water content is controlled as the 45% to 50% of field water capacity and the mineralization degree of brackish irrigation water is 6 g/L,Tamarxi ramossisima is still able to maintain growing and the test plant branch number,branch length,crown width decrease 15% to 30% of that under the condition of irrigation with low salinity water.②Through the analysis of the water physiological characteristics of Tamarxi ramossisima,the daily change curve of the leaf transpiration rate,photosynthetic rate,stomatal conductance and daily water use efficiency curve can be drawn.Under the condition of mineralization degree as 3 g/L,its transpiration rate and photosynthetic rate reach the highest.Then photosynthesis decreases with the increase of salinity.Tamarxi ramossisima is a kind of desert plant with low transpiration rate and low photosynthetic.Leaf water use efficiency is rather high in the morning,while maintains at a relatively low level in the afternoon.

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