Abstract:

In order to reduce the effect of low temperature and disease in rice seedlings period, root activity of seedling period of main cultivated rice varieties in Jilin Province was analyzed in this paper. 7 main cultivated rice varieties (‘Changbai9’, ‘Changbai16’, ‘Jijing803’, ‘Jijing105’, ‘Jijing88’, ‘Jijing83’, ‘Jijing81’) were treated with low temperature 8-12℃. After low temperature treatment for 1-6 days, the root activity was determined through linear interpolation. And the relationship between the days in low temperature and root activity was analyzed by using regression method. The results indicated that, under the different low temperature, the longer treatment days induced the lower root activity. Under the same temperature and different treatment days, the root activity order was ‘Jijing81’ > ‘Jijing83’ > ‘Jijing88’ > ‘Jijing803’ > ‘Jijing105’ > ‘Changbai16’ > ‘Changbai9’. According to this paper, we could predict the root activity of seedling by using different temperature condition. And the root activity of seedling is related to different rice variety.