8种棕榈植物幼苗耐盐性的比较分析

Comparative Analysis on the Salt Tolerance of 8 Palms Seedlings

将加那利海枣(Phoenix canariensis)、棍棒椰子(Hyophorbe verschaffeltii)、三角椰子(Dypsis decaryi)、国王椰子(Ravenea rivularis)、飓风椰子(Dictyosperma album)、大王椰子(Roystonea regia)、红棕榈(Latania lontanoides)和狐尾椰子(Wodyetia bifurcata)8种棕榈植物幼苗培养在不同含盐量的土壤中,研究了土壤盐度与棕榈植物幼苗株高生长、植株各部分生物量的关系,确定棕榈植物幼苗生长的土壤盐度的适宜值、临界值和极限值。根据植物生长量和土壤盐度的关系曲线,可以分成3种类型:低盐促进类型(三角椰子和棍棒椰子)、直线负相关类型(国王椰子、加那利海枣和飓风椰子)和低盐敏感类型(狐尾椰子、红棕榈和大王椰子)。8种棕榈植物幼苗耐盐性依次为:加那利海枣>棍棒椰子>三角椰子>国王椰子>飓风椰子>大王椰子>红棕榈>狐尾椰子。

8 palms seedlings,such as Phoenix canariensis and Hyophorbe verschaffeltii,were cultivated in soils with different salinity and their relations between growth and soil salinity were investigated.Suitable,critical and limit values of soil salinity for seedling growth were determined by analyzing relative plant growth and productivity under salt stress.Palm seedlings were divided into 3 types based on the relation curves between their growth and soil salinity：type of stimulation under low salinity;type of linear negatively correlation;type of susceptivity under low salinity.The tolerance ability to salt stress went down as follows：Phoenix canariensis,Hyophorbe verschaffeltii,Dypsis decaryi,Ravenea rivularis,Dictyosperma album,Roystonea regia,Latania lontanoides and Wodyetia bifurcata.Our results provide experimental supports for application of palm plants to coastal areas of southern China.