不同处理对打破野生黄花苜蓿种子硬实的效果研究

摘要

为了探索打破锡林浩特野生黄花苜蓿种子硬实的适宜方法,提高种子发芽率,分别采用6种不同方法处理种子.结果表明:切割处理的种子发芽率达到98.50%,硬实完全破除,砂纸打磨发芽率达到93.00%,硬实率下降到4.00%;浓硫酸处理15~50 min,发芽率均达到95%以上,硬实完全破除;100 ℃热水浸种对破除硬实效果显著,但发芽率(69.00%)相对较低;液氮处理5~20 min,均能不同程度地打破种子硬实,提高发芽率,但幼苗均呈现不同程度的损伤;0.3%高锰酸钾处理1~6 h对破除种子硬实效果不显著.%Six methods were used to treat hard seed of Xilinhot wild Medicago falcata L.,in order to explore the optimum method and improve the germination rate of Medicago falcata L..The results showed that cutting and abrasing seed coats had significant effects to 98.50% and 93.00% of seed ger-mination rate,which decreased the hard seed percentage to zero and 4.00%.treated with sulfuric acid 15 to 50 min,the germination rate could increased to 95%,and decreased the hard seed percentage to zero.With 100 ℃ hot water soak treated,it had obvious effect on the break the hard seed,and the ger-mination rate was relatively low(69.00%).Liquid nitrogen treated 5 to 20 min,it could break the hard seed at different degree and improve the germination rate,but the seedlings showed different degree damage.treated with 0.3% KMnO41 to 6 hours,there was no obvious effect on the break the hard seed of Medicago falcata L..