Maize jointing stage is the key period for the need of water and fertilizer in the whole growth period. At this stage, a well-watered top-dressing fertilizer is the key to promoting good growth of corn plants and normal differentiation of tassels. The large bell-mouth period of corn should have sufficient moisture. We must keep the fields wet and dry to meet the needs of the jointing period of corn. The amount of water in the field is kept at about 70%. Watering combined with topdressing available nitrogen fertilizer.
The big bell-mouth period of corn is the critical period of Cheng-Sui. The drylands need to be rain-fed. The irrigated land needs to be watered to catch fertilizer, and the topdressing can be applied to the middle of the plant or top dressing. After cultivating, we should timely cultivating and weeding. During the jointing stage, combined with fertilization and watering, timely ploughing and earth-cultivation can achieve various effects such as weed control, fertilizer retention and moisturizing, root protection, and promotion of corn yield increase.
Maize jointing stage mainly includes corn borer, aphid, red spider and armyworm and other pests. Corn stalks need to be supplemented with Zinc Phosphorus granules and fine sand, mixed with 1:50 poisonous soil per plant, and the control effect can reach more than 90%. The locusts and spider mites can be sprayed with pesticides such as daphthones and locust nets. Mythimna separata can be sprayed with 40% Dimethoate EC 1500-2000 times. The effect is significant.
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