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水稻品种产量的高低,是水稻品种的丰产特性和自然条件相互协调的结果,且呈正相关发展。在目前尚不能完全排除种种不利自然条件的情况下,水稻的适应性问题愈来愈引起人们的重视。影响水稻生长发育的环境因素很多,如光、温、涝、旱、虫、病等。我县地处重庆大江两岸和娄山山脉的盆地边缘的“梅雨”影响地带,早春倒春寒,5、6月阴雨多,日照少,7、8月高温伏旱,9月下旬和10月上旬冷空气降临早。影响水稻生长发育的主要危害是:早稻苗期、晚稻抽穗扬花期的寒害;早稻和中稻营养生长期的涝害;早稻和中稻早熟种幼穗分化减数分裂期的阴雨障碍性冷害因素等。
The yield of rice varieties is the result of the coordination between high yield characteristics and natural conditions of rice varieties, and there is a positive correlation between them. In the current situation can not completely rule out all kinds of adverse natural conditions, the issue of adaptability of rice more and more people’s attention. Environmental factors that affect rice growth and development are many, such as light, temperature, flood, drought, insects, diseases and so on. My county is located on the edge of the “Meiyu” impact zone on both sides of the Dajiang River and the Loushang Mountains in the basin. There are more rain in early spring, more rainy days in May and June, less sunshine, high temperature and drought in July and August, cold air in late September and early October Arrival early. The main hazards to the growth and development of rice are: chilling injury at early seedling stage, late heading stage at heading and flowering stage; waterlogging in early and middle-stage rice during vegetative growth stage; and factors of over-cooling and over-cooling during early maturing and early maturing stages of middle-season rice.