The jointing stage of corn is the key period for water and fertilizer in the whole growth period. At this stage, the watering and topdressing is the key to promote the good growth of corn plants and the normal differentiation of tassels. In the big trumpet period of corn, there should be sufficient water. It is necessary to keep the field surface wet and dry, so as to meet the needs of corn in the jointing stage, the field water holding capacity is maintained at about 70% . Watering combined with the application of quick-acting nitrogen fertilizer.
 Maize large bell of the key into the ear, a 10 mu topdressing urea 15 kg. Dry land needs to be applied by rainfall. The irrigated land needs watering to chase the fertilizer. The top dressing can be applied in the middle of the plant or the topping point. After watering, we must weed and weed in time. During jointing, combined with fertilization, watering, timely hoeing and soil cultivation, to achieve weeding, moisturizing, moisturizing, root-preventing and other effects, to promote corn yield and income.
 At the jointing stage of maize, there are mainly pests such as corn borer, aphid, red spider and armyworm. Disulfoton borer required zinc granules and fine sand, mix into a 1: toxic soil by irrigation heart line 50, up to 90% control effect. Aphids and red spiders can be sprayed and controlled with pesticides such as Daqinling and Aphid. The armyworm can be sprayed with 40% dimethoate 1500~2000 times liquid spray, and the effect is remarkable.
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