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玉米秃顶、缺粒,虽是生产中常见的现象,但对声量影响甚大。那么造成的原因是什么呢?据调查有以下几个因素:一、养分供应不足众所周知,玉米穗分化期是营养和生殖生长齐头并进、生长发育需求养分最多的时期。养分供应不足就会导致穗部顶端迟分化的小花发生退化而造成秃尖。二、高温干旱抽雄前后是玉米需水量最多的临界期,这时如干旱无雨就会直接导致雄蕊开花和雌穗抽丝期的后延而影响授粉;若此时温度高于32—35℃,空气湿度接近30%时,也会导致雌雄穗花期不协调而影响授粉。三、阴雨潮湿经验证明,在这种气候条件下,常常会影响雄穗正常开花散粉,或花粉吸水膨胀破裂,或粘住成团失去生活力,影响授粉造成秃尖缺粒。
Bald corn, lack of grain, though it is a common phenomenon in production, but a great impact on the volume. So what are the causes? According to the survey, there are several factors as follows: First, insufficient nutrient supply As we all know, maize ear differentiation is nutrition and reproductive growth go hand in hand, growth and development needs of the most nutrient-rich period. Inadequate supply of nutrients can lead to degeneration of later differentiated florets on the top of the spikes and cause baldness. Second, before and after the high-temperature arid tasselling is the critical period of the most water requirements of corn, when the rain is dry at this time will directly lead to the stamen flowering and the ear extension of the spinning period and affect the pollination; if the temperature is higher than 32-35 ℃ , Air humidity close to 30%, it will lead to inconsistent pollination of male and female florescence. Third, wet and rain experience has shown that in this climate, often affect tassel normal flowering loose powder, or pollen water swelling rupture, or stick to the group lost vitality, affecting pollination caused by bald sharp lack of grain.