The central task of field management during the kernel stage is to create a good growing environment for pollination and fruition, increase the photosynthetic efficiency, extend the physiological activity of roots and leaves, prevent premature decay and lodging, achieve graininess, grain weight, full grain, high yield and high efficiency. purpose.
Chase fertilizer
Due to the deficiency of basal fertilizer, maize has not much top-dressing, and the phenomenon of premature aging appears late. In addition, the nutrient transport center in the body has been transferred from vegetative to reproductive organs. The top-dressing during this period is mainly to make the vegetative organs not prematurely decline and increase the photosynthetic productivity. Promoting the establishment of ears and grains is an important period for promoting graininess and grain weight. However, to grasp the principle of early recovery, the amount of ammonium per acre, generally 8-10 kg. Do not topdress urea as much as possible, because the effect of urea fertilizer is slow, and the effect after topdressing is not significant. It can spray 0.3-0.5% potassium dihydrogen phosphate solution once every 10 days after tasseling and flowering, and spray 2-3 times successively to ensure coordinated supply of nutrients in the later period and promote large spikes, multiple grains, and high yield.
Interlaced
Intercropping corn is a simple and easy way to increase production. The masses have the saying that "corn has gone its head and its strength is as large as cattle". After detasseling, the nutrients and moisture needed for tassels to flower can be transferred to the ear of the ear to increase the number of seeds and seeds and increase yield. . According to experiments, corn that has been emasculated by intercropping can increase production by 10-12%. Detasseling should be carried out at the most suitable time when tassels are just extracted and have not yet bloomed. The number of detaches is one line at a time, and the field is less than 60%.
Drought resistance
The flowering period is the peak period of corn water demand. Irrigation during this period is very important and it is the key to increasing corn production. If soil moisture is insufficient and water shortage occurs at this time, the lifespan of the pollen will be shortened, pollinating and fertilization conditions will deteriorate, resulting in bald head and less grain, affecting the formation and filling of grains, resulting in reduced yield. Therefore, during this period of drought, it is necessary to water in time to meet the water demand of corn grouting. At the later stage of corn growth, the growth ability of the roots is gradually weakened and it is very resistant to earthworms. In case of excessive rain or low-lying land, pay attention to drainage. Conserve roots and extend the active period of the root system.
Soil cultivating in the later stages of soil erosion can remove the compaction, promote ventilation, facilitate nutrient decomposition, promote root respiration and absorption, prevent premature decline, and promote early maturing. The combination of cultivating and soil cultivation plays a role in preventing lodging. In the event of a stormy storm in the later period, it causes lodging, and the plants cover each other, and it is difficult to recover naturally. It should be lifted in time to give rise to earth and reduce losses.
Pest control
Strengthen the prevention and control of corn borers and armyworm pests in the later period. This is an important measure for increasing yields and yields. 80% of dichlorvos can be used 200 times, after the pollination of corn into the top of the filaments, about 3 ml per plant is appropriate.
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