寒地水稻抗旱品种的筛选与鉴定

Screening and Identification of Drought Resistant Rice Varieties in Cold Region

针对黑龙江省水资源短缺现象加剧及干旱灾害时有发生的情况,采用田间直接鉴定法,对黑龙江省第二、第三积温带具有代表性的水稻品种进行抗旱性筛选与鉴定。结果表明,绥粳3号、绥粳8号、绥粳18、龙粳31等4个品种抗旱性较好;影响水稻抗旱性的第一主因子为4叶1心期根系活力,第二主因子为分蘖盛期根系活力,第三主因子为有效穗数,第四主因子为穗粒数,第五主因子为强势粒灌浆速率,第六主因子为播抽历期。

According to the situation of water resources shortage and drought disaster in Heilongjiang Province, a test was carried up to screening and identification the drought resistance rice varieties of the second and the third accumulated temperature zone in Hei-longjiang Province. The results showed that, the drought resistance of Suigeng 3, Suigeng 8, Suigeng18 and Longgeng 31 were better;the first main factor affecting the drought resistance of rice was root activity of seedlings stage, and then followed by root activity of ac-tive tillering stage, effective panicle number, grain number per spike, filling rate of superior grain and days from sowing to earing.