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用适宜浓度的混合硝酸稀土对马占相思和大叶相思进行浸种处理可促进种子中内含物的转化,从而促进种子的萌发和幼苗生长,但同一稀土溶液对不同树种的适宜浸种浓度不同。总的来看,在低浓度(10～300mgL-1)范围内种子的发芽率、发芽势和幼苗的苗高、主根长、侧根数、茎叶干重、根干重和总干重均随稀土浓度的增加而呈增长趋势,到达最大值后,随着稀土浓度的增加而下降,而用高浓度(500～1500mgL-1)的稀土浸种则会对种子萌发和幼苗生长产生抑制作用。
Soaking Agar acacia and Acacia confusa with appropriate concentration of rare earth nitrate can promote the transformation of the contents of the seeds and promote the seed germination and seedling growth, but different soaking concentrations of the same rare earth solution for different tree species are different. In general, germination rate, seedling height, seedling height, root length, lateral root number, stem and leaf dry weight, root dry weight and total dry weight of seeds at low concentration (10-300mgL-1) Rare earth concentration increased with the increasing trend, reaching the maximum, with the increase of rare earth concentration decreased, while with high concentrations (500 ~ 1500mgL-1) of rare earth seed germination and seedling growth will have an inhibitory effect.