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近几年来,玉米制种花期遭受高温干旱频率不断增多,产量降低,品质变劣,种子质量不达标。为了解决这一问题,宜川县种子站对玉米制种田进行了详细调查并做了大量试验,寻找出了原因,提出了相应对策。 1 高温干旱对玉米制种花期影响玉米制种开花散粉最适宜的温度和相对湿度分别为25～28℃、70%～85%,温度超过30℃和相对湿度低于60%时开花很少。据宜川县气象站资料,1999～2000年7月15日至8月10日,最高气温平
In recent years, the flowering of maize seedlings suffer from high temperature and drought frequency increasing, yield decline, deterioration of quality, seed quality is not up to standard. In order to solve this problem, Yichuan County Seed Station carried out a detailed investigation of maize farming and did a lot of experiments to find out the reasons and put forward corresponding countermeasures. 1 high temperature and drought on the flowering of corn seedling flowering Maize flowering loose powder the most appropriate temperature and relative humidity were 25 ~ 28 ℃, 70% ~ 85%, the temperature exceeds 30 ℃ and relative humidity below 60% flowering rarely. According to Yichuan County weather station data, 1999 ~ 2000 July 15 to August 10, the highest temperature flat