不同化学药剂对紫薇种子萌发和幼苗长势的影响

Effects of Different Chemical Agents Treatments on Seed Germination and Seedlings Growing of Lagerstroemia Indica

紫薇结实率虽高,但容易产生烂种,发芽率较低,成长为健壮幼苗比较困难。本实验采用不同浓度SA和GA3处理紫薇种子,在模拟自然环境和恒温25℃全光照两个不同的自然条件下,研究了紫薇种子的发芽力和幼苗的株高、鲜重、叶面积的变化。结果表明:1～15 mg/L范围内SA处理的种子发芽力较低和幼苗长势较弱。1 000 mg/L GA3处理的种子在模拟自然环境条件下发芽力较高,但是幼苗长势差于1 500 mg/L GA3的处理。恒温25℃条件下,1 500 mg/L处理的种子总体效果最好。

Lagerstroemia indica has highly rate of seeds,but easy to rot and difficult to grow strong and healthy seedlings.Lagerstroemia indica seeds were processed by different levels of SA and GA3 in this experiment.This experiment studied Lagerstroemia indica seed germination ability,seedling height,fresh weight and leave area in simulateded environment,25℃constant temperature and all light condition.The result showed that the seed germinating ability and seedling growth were weak when SA concentration was 1-1.5mg/L.In simulated environment,when GA3 concentration was 1000mg/L,seed germination ability was relative high,but seedling growth vigour was weaker than that of 1500mg/L GA3.In a word,seed treatment effect was the best in constant temperature and 1500mg/L GA3 condition.