咸水灌溉对9种绿化树种生长的影响

Effects of Irrigation with Saline Water on the Growth of 9 Greening Tree Species

为了探讨盐碱地区咸水灌溉对造林的影响,以便有效利用水资源,提高造林绿化水平,笔者采用咸水直灌和轮灌2种技术,用不同矿化度咸水(0、2、5、8、12、15 g/L)对9种造林绿化树种进行灌溉试验,研究不同灌溉条件下各树种的表型特征。结果表明:在不影响树种生长的情况下,绒毛白蜡、刺槐和紫穗槐造林绿化可用12 g/L咸水轮灌,盐柳和竹柳可用8 g/L咸水轮灌,中国白蜡、小叶白蜡、杜梨和沙枣可用5 g/L咸水轮灌。根据各树种成活情况初步确定:盐柳、竹柳和中国白蜡不适宜咸水直灌,其他6种树种适宜咸水直灌,耐受能力依次为:沙枣(15 g/L)>杜梨(12 g/L)>绒毛白蜡(8 g/L)>紫穗槐、小叶白蜡、刺槐(5 g/L)。

In order to explore the effects of saline water irrigation on afforestation in saline-alkali areas, so that utilizing the water resources effectively and enhancing the level of afforestation and virescence. The experiment used two kinds of irrigation techniques （saline water irrigation and saline and fresh water alternate irrigation）, and carried out the experiment of irrigating the 9 gardens tree species with saline water of different salinity （0, 2, 5, 8, 12, 15 g/L）, and studied the phenotypic characteristics of each tree species under different irrigation conditions. The results showed that： without affecting the growth of tree species, Fraxinus velutina Torr., Robinia pseudoacacia and Amorpha fruticosa for afforestation and virescence could be irrigated alternately by saline and fresh water with a mineralization degree of 12 g/L, Salix psammophila and S. matsudana with a mineralization degree of 8 g/L, Fraxinus chinensis, Fraxinus sogdiana Bunge, Pyrus betulaefolia Bunge and Elaeagnus angustifolia L. with a mineralization degree of 5 g/L. According to the survival of each tree species situation, the following could be determined：Salix psammophila, S. matsudana and Fraxinus chinensis were not suitable for direct irrigation with saline water, the other 6 tree species could be irrigated by saline water, and the salt-tolerance ability was：Elaeagnus angustifolia L. （15 g/L）〉Pyrus betulaefolia Bunge （12 g/L）〉FraxinusvelutinaTorr. （8 g/L）〉Amorphafruticosa, FraxinussogdianaBunge, Robiniapseudoacacia（5 g/L）.