First, rational fertilization
After the jointing, the differentiation of the male and male ears begins, and the demand for nutrients is increasingly urgent, which is a critical period for water and fertilizer. At this time, the application of panicle fertilizer, fertilizer and water attack can not only meet the fertilizer and water demand of panicle differentiation, but also increase the photosynthetic productivity of the middle and upper leaves, so as to achieve more spikes, fullness and higher yield. Spike fertilizer is mainly based on quick-acting nitrogen fertilizer, and is carried out by means of application or acupoint application. The panicle fertilizer is generally applied with 25 to 30 kg of urea and 10-15 kg of diammonium phosphate.
Second, cultivating soil
Cultivating is an important measure in the management of corn field. The principle of cultivating is shallow in the side of the seedling and deep in the row. Corn cultivation is a non-negligible link in cultivation technology. The soil can increase the light-receiving area of ​​the topsoil, reduce the grass damage, improve the fertilizer efficiency, and prevent wind and lodging. It is not advisable to cultivate the soil too early or too high to avoid damage to the leaves of the base. The time for cultivating the soil is generally carried out twice before the booting to the tasseling. The first time the soil is lower and the second is higher. If you do a soiling, it is best to do it during the big bell period.
Third, irrigation
After the maize plants begin to joint, the growth enters a vigorous stage and the water demand is high. Especially in the first half of the tasseling, the tassel has formed, and the ear is accelerating the differentiation of spikelets and florets, and the requirements for water conditions are higher. At this time, if the water supply is insufficient, the number of spikelets and small flowers will be reduced, thus reducing the number of grains on the ear, and at the same time causing "ka neck drought", delaying the tasseling and pollination, and reducing the seed setting rate and affecting the yield. In the case of drought, it is necessary to fill the water to reduce the baldness and lack of grain.
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