稀土对马占相思和大叶相思种苗的影响

用10～1000 mg/L稀土溶液对马占相思和大叶相思浸种24 h后的试验结果表明：适宜浓度的稀土溶液可促进马占相思和大叶相思种子内含物的转化,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。马占相思以10 mg/L处理有利于提高种子发芽势并缩短发芽时间;大叶相思10～30 mg/L处理显著提高种子发芽率和发芽势,但没有显著缩短发芽时间。200 mg/L及以上浓度浸种对2种树种种子萌发有抑制作用。考虑指标多重比较差异及经济因素,10 mg/L处理较利于马占相思和大叶相思幼苗高和根系生长。

Effects of rare earth on seeds and seedlings of Acacia mangium, Acacia auriculiformis

Acacia earth solution by soaking mangium willd, and A. auriculiformis A. Cunn. were treated with 10 - 1 000 mg/L rare seed for 24 hours. The results showed that treating with optimum concentration of rare earth solution could promote the transformation of internal substance and germination of seed, and seedling growth However, different species had different optimum concentration of the rare earth solution. A. mangius seeds, soaked with 10 mg/L, had higher germination potential and a shorter germination time. A. auriculiformis seeds, soaked with 10 -30 mg/L could significantly increase germination percentage and germination potential, but couldn＇t significantly shorten the germination time. Soaked with 200 mg/L and above concentrations inhabited two tree species seeds germination. Based on results of Duncan＇s Multiple Test, and economic factor, 10 mg/L could significantly promote seedling height and root length of the two tree species.