水稻种子的发芽规律及其控制措施研究

Study on the Seed Germination Law and Its Control Measure in Rice

不同成熟度的水稻种子发芽率测定结果表明：成熟度越高，种子的发芽能力越高；种子的发芽率在开花授粉后20天就可达到70％，25天可达到80％以上，烘干处理不能提高成熟度（指开花授粉后的天数）中等的种子发芽力，而且使其发芽势降低。研究结果表明，成熟度高的水稻种子不经风干就可进行发芽，而且发芽势高；另外，5种外源药剂有解除种子休眠的作用,提高发芽率，其中1％H2O2、0．2NH2SO4和0．2N硝酸钾处理的水稻种子，其发芽势明显高于对照（水）。

The germination percentaage examination of rice seeds with different mature degree was done. The result indicated that: The higher the mature degree of rice seeds, the higher the germination percentage. The germination uniformity of rice seeds could reach 70% after 20d of pollination, which was more than 80% after 25d of pollination.Stoving treatment could not enhance the germination uniformity of mid-mature rice seeds. The well matured rice seeds could well germinate without stoving and the germination uniformity was also high. In addition, five medicines could effectly break the seed dormancy and, enhance the germination percentage. The germination unifornity was increased significantly as compared to the check(water) after the rice seeds being treated with 1 %H2O2,0. 1NH2SO4 and 0. 2NKNO3.