杂交稻种子饱满度对发芽率、成苗率及秧苗生长的影响

Effects of seed plumpness on germinating rate, seedling rate and growth of hybrid rice

研究分析杂交稻组合两优培九、协优7954和协优9320不同饱满度种子的发芽率、成苗率,以及秧苗的分蘖能力和生长量的差异。结果表明,不同饱满度种子的发芽率和成苗率存在着显著差异,饱满度越差,发芽率和成苗率越低,在清水中上浮的种子发芽率为35％～68％、成苗率为30％～62％;而在1.10比重溶液中下沉的种子,发芽率在97％以上、成苗率在75％以上。在清水中上浮种子的秧苗在分蘖能力、物质生长量均小于饱满度较高种子的秧苗。讨论了水稻生产中选种的作用和意义。

Variation in germinating rate, seedling rate and growth of the seeds with different plumpness of hybrid rice varieties Liangyoupeijiu, Xieyou7954 and Xieyou9320 was studied. The results showed that the germinating rate and the seedling rate were significantly positive correlated with seed plumpness. The lower plumpness of rice seeds was, the lower their germinating rate and seedling rate was. The germinating rate of the rice seed floating on water was 35% -68% , and the seedling rate was 36% -62%. However, the germinating rate of the seeds sinking in 1.10 gravity solution was more than 97%, and the seedling rate was more than 75%. Tiller capacity and dry matter of the seeds floating on water was lower than that of the seeds sinking in 1.10 gravity solution. Efficiency of seed selection in rice production was discussed.