一、追施粒肥。在玉米吐丝期如发现果穗以下四片绿叶有退劲早衰现象时，就要及时补施粒肥，补施肥量约占总施肥量的10％左右，一般亩追施标氮5kg左右。二、适期去雄。玉米植株顶端的雄穗在生长发育过程中，消耗的养分约是玉米植株的5－8％，而且还消耗一定的水分。如能适当除去 A top-grain fertilizer. Sprouting in the corn, such as the discovery of the following four green leaves have the phenomenon of recession premature aging, it is necessary to make timely application of fertilizer, make up about 10% of the total amount of fertilizer about the amount of fertilizer, the general chase nitrogen 5kg or so. Second, the appropriate period to male. The tassel at the top of corn plants consumes about 5-8% of the corn plant during growth and development, but also consumes some moisture. If properly removed