关键词: 水稻, 盐碱地, 品种筛选, 托克托县

Abstract: The salt content of the local irrigation water in Toketo County, Inner Mongolia has been maintained at a level of 3.0 ‰ to 5.5 ‰ all year round, which seriously affects the growth and development of rice. In order to promote the development of the local rice industry, a screening experiment of saline-alkali-tolerant rice varieties was carried out for the local saline-alkali water and soil environment. The results showed that, there were significant differences in the survival rates of the 11 tested varieties with the transplanting time. 30 days after transplanting, the survival rates of Jigeng 113, Jigeng 301 and Jigeng 515 decreased below 50%, while Songgeng 9, Gengyou 315, S7 and Gengyou 653 remained above 90%, showing strong salt tolerance. The seedling rate of hybrid rice varieties is much higher than conventional rice varieties. The plant height of the tested varieties is lower than that of the variety grown under normal environment. Except the panicle length of Songgeng 9 and Gengyou 653 were close to normal value, the other varieties showed significant inhibition. In the experiment, the yields of Songgeng 9 and Gengyou 653 are outstanding, which could be used as the recommended varieties planting in local and similar ecological areas.

Key words: rice, salt and alkali land, variety screening, Toketo county