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花铃期,棉花由营养生长为主逐渐转入生殖生长为主,既要长枝叶,更要长花铃,此期生长最旺,蒸腾最强烈,需水最多,其耗水量约占全生育期总耗水量的一半以上,若水分供应不及时,就会造成生理代谢受阻,发育受抑,致使蕾铃脱落,影响产量。因此,棉花进入花铃期后,要看天、看地、看苗进行旱情诊断,以确定是否要抗旱浇水。看天。就是看雨勤雨稀,雨量大小。进入伏天以后,如果10—15天无雨或雨量不足20毫米,棉田就会出现旱象,但是由于地势、土壤茬口以及棉花生长发育等情况不同,缺水状况也有所不同。
During the flowering period, cotton is mainly transformed from vegetative growth to reproductive growth. It requires both long branches and long flowering bells. Its growth is strongest, its transpiration is the strongest, and its water demand is the largest. Its water consumption accounts for the total fertility More than half of the total water consumption, if the water supply is not timely, it will result in obstruction of physiological metabolism, developmental depression, resulting in falling off of the bud, affecting the yield. Therefore, the cotton flower into the bell period, depends on the weather, see, see the seedlings drought diagnosis, to determine whether to drought drought watering. Look at the sky. Is to see the rain Qin rain thin, rainfall size. After entering the voyage, if 10-15 days without rain or less than 20 millimeters of rainfall, the cotton fields will appear dry, but due to the topography, soil stubble and cotton growth and development and so on, the water shortage is also different.