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水稻起源于热带、亚热带,对温度很敏感,最易受低温伤害。 新疆属北方寒冷单季稻区,水稻以直播为主,故研究水稻品种苗期抗冷性,可为生产单位选用抗冷性品种提供依据,也可为育种工作者提供抗冷性亲本材料。 供试材料共34份,其中新疆地方品种16个,新疆选育品种11个,引进品种7个。研究方法采用田间调查鉴定法。1984—1986年,每年均从34个品种中分别人工挑选当年收获的饱满种子50粒,于每年5月初先浸种3天左右后随即播种(播种时各品种的施肥
Rice originated in the tropics, subtropics, very sensitive to temperature, the most vulnerable to cold damage. Xinjiang is a cold-season single-crop rice region in northern China with direct seeding of rice. Therefore, the study on cold-tolerance of rice varieties at seedling stage can provide a basis for selection of cold-tolerant cultivars in breeding units and cold-resistant parental material for breeding workers. A total of 34 materials were tested, including 16 Xinjiang local cultivars, 11 Xinjiang breeding varieties and 7 introduced varieties. Research methods using field investigation and identification method. From 1984 to 1986, 50 full-length seeds were harvested each year from 34 varieties annually, soaking them for about 3 days at the beginning of May each year (sowing