玉米生长期间,倘若田间管理不当,很容易形成“老稀牙”,不仅产量低,而且对品质也有很大的影响。因此,玉米生长中后期的田间管理要重点抓好以下几项措施:(1)追施粒肥。在吐丝期发现果穗,以下四片绿叶有退劲早衰现象时,应及时补施粒肥。追肥量约占总用量的10%左右,一般亩追施标氮5公斤左 During corn growth, if the field is not properly managed, it is easy to form “old dilute teeth”, which not only has low yield but also has a great impact on quality. Therefore, the mid-late field corn growth management should focus on the following measures: (1) topdressing grain fertilizer. Found in the silking ear, the following four green leaves have the phenomenon of recession premature, should promptly fill fertilizer. Topdressing amount of about 10% of the total amount of about 5 kg of general chase nitrogen