关键词: 耐盐性, 发芽率, 发芽势, 幼苗长度

Abstract: Salt tolerance of 3 Ceratoides pps varieties in germination period has been studied by measuring the germination energy, germination rate, seedling length under treatments with 0.3%,0.6%,0.9%,1.2%, 1.5% and 1.8% NaCl solution. The results show that 1.2% or 1.5% NaCl solution can be used to identify the salt tolerance of Ceratoides pps. In germination period the salt tolerance of the 3 varieties have obvious difference, with the increasing of NaCl solution concentration, the germination maximum delayed, the germination rate decreased, and the seeding length reduced. The integrated analysis from germination rate, germination energy, and seeding length showed that the salt tolerance of the 3 varieties rank as follows: Ceratoides arborescens(Losinsk.)Tsien et C.G. Ma > Ceratoides lanata (Pursh) Howell > Ceratoides latens (J. F. Gmel. Reveal et Holmgren).

Key words: salt tolerance, germination rate, germination energy, seedling length