摘要
Abstract
The effects of high temperature on germination rate of rice seed were studied, using the ultra dry seeds, dry seed, fresh seed, wet seed, white seed of two early indica rice varieties as materials. The results showed that there were significant differences in high temperature tolerance ability of ultra dry seeds, dry seeds, fresh seeds, wet seeds and white seeds, performance for ultra dry seeds>dry seeds>fresh seeds>wet seeds>white seeds. The effects of water temperature on germination rate was more significant than temperature. The germination rate was decreased with the increase of treatment temperature and treatment time significantly in a cer-tain range. The seed germination rate of different rice showed the same trend after temperature treatment, but there were also signifi-cant individual differences. The seed moisture content restricts the ability of high temperature resistence, the higher the moisture con-tent of seeds, the weaker the resistance to heat.关键词
水稻/种子/发芽率/高温Key words
rice/seed/germination rate/high temperature分类
农业科技
