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夏玉米从抽雄开花散粉到成熟称之为生育后期。玉米自开花散粉受精后,即转入以籽粒形成和灌浆为中心的生育时期,也是形成籽粒和增加籽粒重量的关键时期。因此,为了促进玉米灌浆和提高单位面积产量,必须抓好以下五个方面的关键技术措施。一、酌追攻粒肥,促粒饱增粒重夏玉米进入抽雄期,是追施攻粒肥的最佳时期,也是玉米一生最后一次追肥。因需肥不多,生产上往往被忽视。据测定,掖单13号玉米进入蜡熟初期时,每亩日平均需氮0.41公斤、磷0.19公斤、钾肥0.43公斤。此期追肥的主要作用是:能有效地防止茎叶早衰,延长叶片的光合时间,
Summer maize flowering from tasseled to maturity known as fertility late. After fertilizing and fertilizing the corn, it turns to the growth period centered on grain formation and grain filling, and is also a crucial period for grain formation and grain weight increase. Therefore, in order to promote corn grouting and increase yield per unit area, we must grasp the following five key technical measures. First, the discretion to attack granulation, granulation Grains to increase grain weight Summer corn into the tasseling period, is the best time to pursue granulation fertilizer, but also the last corn top dressing. Due to lack of fertilizer, production is often overlooked. According to the determination of Yedang No. 13 corn into the early stages of waxing, the average daily nitrogen required 0.41 kg of nitrogen, 0.19 kg of phosphorus, 0.43 kg of potash. The main role of dressing during this period is: to prevent premature aging stems and leaves, to extend the leaf photosynthetic time,