模拟低温阴雨气候条件下硝酸稀土对早稻幼苗抗冷性的影响

Effects of Rare Earth Nitrate on Cold-Resistanceof Early Season Rice Seedlings

用硝酸稀土水溶液浸泡水稻种子２天后催芽，待稻苗长至２叶期，在模拟低温阴雨气候条件下生长５天，然后测定有关生理指标。结果表明，一定浓度的硝酸稀土可以提高早稻幼苗的抗冷性，这一结果比较符合生产实际。

The early season rice seeds have been soaked in the water solution of rare earth nitrate for two daysand then have been hasten to sprout.When they come into their two-leaf period,the rice seedlings are kept in the simulated microthermal and rainy climate for five days.Finally their relevant physiological indexes are determined.The result shows that rare earth nitrate of a certain concentration can improve the cold-resistance of rice seedlings.