实践证明,玉米拔蓼是一项投工少、见效快的增产措施,可促进早熟5—7天。一般增产5-10%。但在拔蓼时,应注意以下问题; 1.拔蓼的时间拔蓼过早,易拔掉顶端叶片而影响生长:过晚,则花粉已成熟,养分被大量地消耗掉, 失去了拔蓼的意义。因此,应在雄穗刚抽出、花粉还没散开之前进行。即在一块田里有1/3的植株雄穗抽出时选择晴天上午10时至下午3 Practice has proved that maize Polygonum hydropiper is a less investment, quick stimulation of stimulation measures, can promote early maturity 5-7 days. General increase 5-10%. However, when Polygonum hydropiper, you should pay attention to the following questions; 1. Polygonum hydropiper premature infiltration of Polygonum, easy to pull off the top leaves and affect growth: too late, the pollen has matured, nutrients are consumed in large numbers, lost Polygonum Meaning. Therefore, it should be just tassel out, before the pollen has been dispersed. That is, in a field where 1/3 of the plants tassel out when sunny days from 10 am to 3 pm