The primary task of corn management during flowering is to create a good growing environment for pollination and fruition, increase the photosynthetic efficiency, prolong the physiological activity of roots and leaves, prevent premature decay and lodging, and achieve grain filling and high yield. The main measures are:
Topdressing granular fertilizer. In the early stage, maize is not top-dressing, and when there are defertilizers in the later period, grain fertilizer should be top-dressed to promote the increase of grain weight and yield. However, to grasp the principle of early application and appropriate amount, generally apply 8-10 kg of ammonium bicarbonate per acre. During this period, it is not necessary to top up urea because the effect of urea fertilizer is slow and the effect of increasing production is not significant.
Drought prevention, lodging and lodging. The flowering period is the peak period of corn water demand. If water shortage occurs during this period, it will result in bald tip and small grains, which will affect the formation of grain and grouting, resulting in reduced production. Therefore, the drought should be timely irrigation of farmland to meet the water demand of corn grouting. At the later stage of corn growth, the growth ability of the roots is gradually weakened. Therefore, it is also necessary to pay attention to drainage in low-lying plots and places with excessive rainfall. In the later period, we should also pay attention to cultivating soil to prevent lodging.
Prevent pests and diseases. Strengthen the prevention and control of corn borers and armyworm pests in the late corn period, which is an important measure for ensuring production and increasing income. Can use 50% phoxim 1000 times spray control, or with 80% dichlorvos 200 times in the pollination of corn after each plant drops 3 ml in the top filaments.
Appropriate late harvest. Appropriate late harvest of corn can increase grain weight, which is an effective method for excavating the potential of maize yield increase. Harvesting occurs when the corn is ripe and the highest yield is achieved. The characteristics of the ripening period are as follows: Loquat leaves dry and loose, and the grains become hard and shiny golden yellow. Therefore, the harvest period should be appropriately delayed to increase the yield of corn.
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