Study on the Determination of Salt tolerance Index of Main Afforestation Tree Species and Their Ordination in Arid Areas with Secondary Salinization

Zhao Mingfang, (The Research Institute of Forestry,CAF Beijing 100091);Ge Chen,Zhai Zhizhong (The Desert Forestry Experimental Centre,CAF Dengko,Inner Mongolia).  

The research on the slat tolerance index of main afforestation tree species in arid and semi arid areas with secondary salinization was carried out during the year 1991～1995,and the index of salt tolerant were as follows: Populus enphratica Oliv.8 g/L P.alba var pyramidalis Bge.6 g/L Lyeium chinese Mill.7 g/L Tamarix ramosissima Ledeb50 g/L Hedysarum scoparium Fisch.et Mey.5 g/L Hedysarum mongolicum Turcz.6 g/L Elaeagnus angustifolia L.4 g/L Hippophae rhamnoedes L.6 g/L Haloxylon ammodendron (Mey).Bunge30～50 g/L Pyrus betulaefolia Bge.4 g/L Caragana intermedia Kuang et H.7 g/L The ordination for capability of salt tolerant species is from strong to weak: Haloxylon ammodendron,Tamarix ramosissma,Populus enphratica,Lyeium chinese,Caragana intermedia,Hedysarum mongolicum, Hippophae rhamnoides,Populus alba,Hedysarum scoparium,Elaeagnus angustifolia and Pyrus betulaefolia.

【Key Words】： arid area secondary salinization afforestation tree species salt tolerant index
【Fund】： “八五”国家攻关项目
【CateGory Index】： S728.2

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