The corn grain period refers to the period from tasseling to maturity. During the first half of the season (from tasselling to grain formation), flowering and fertilization is the center, and in the latter half (from grain formation to maturity), kernel formation takes place. The feeding center leaves are the middle and upper leaves of the plant. The characteristics of fertility in this stage are: the vegetative body stops growing, and it enters into a period centering on reproductive growth. After flowering and fertilization, it enters into the formation stage of grain yield, which is an important period for determining the number of grains and grain weight. To this end, the central task of field management at this stage is to protect the leaves, increase the photosynthetic intensity, promote grain and grain weight, and achieve high yields.
The main measures for field management are: 1 Top-dressing of grain fertilizers. From tasselling to flowering, high-yielding fields topped 20% of the total nitrogen fertilizer, and mu recovered 9 kg of urea. 2 Drought prevention and drainage. After tasseling, the ground should be kept moist, and attention should be paid to watering at the right time, so as to promote root protection and increase grain weight. If the field water should be drained in time. 3 Pest control. This period is mainly corn borer, armyworm, cotton bollworm, aphids and other hazards, can be used to control 2.5% of the enemy killed 1000 times or 50% phoxim 1500 times. 4 emasculate shear male. When the tassels have just been taken out and have not yet bloomed, the tassels are removed every other row to save nutrients, moisture, reduce plant height, reduce insect damage, and improve light. Attention should be paid to the ground and the land must not be emasculated so as not to affect pollination. . After pollination, all tassels can be trimmed off to increase group illumination. 5 shallow cultivator. After grouting, it can be 1-2 times shallow, increase the temperature by breaking plate ventilation, prevent premature senescence, facilitate early maturing, and increase grain weight. 6 timely harvest. Generally when the loquat leaves are dry and loose, the seeds become hard and shiny, and the milk line disappears. When the black layer appears at the base, it is the mature period, and the harvest yield is the highest.
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