You want to have enough water in the big ears of corn

August 26, 2023

Maize plants from the jointing booting to the heading and flowering period, the rapid growth rate, absorption of nutrients, is the key period of suction. In terms of nitrogen fertilizer alone, the amount of nitrogen absorbed in seedlings accounted for 9.7% of the total, 78.4% in the medium term, and 11.9% in the later period. Therefore, high-yield summer corn must grasp the late fertilization, early pregnancy spike, promote large spikes, seize high yield.
â— Application of jointing fertilizer Summer maize 7-leaf stage is the optimum period for the application of jointing fertilizer. At this time, a large number of maize leaves will be unfolded. During the period when the stems are rapidly elongated, the amount of fertilizer required will be relatively large, generally to the full-leaf 9-leaf stage. At that time, soil nutrients could not meet the needs of corn growth. At this time, we should seize the corn after 7-9 leaf joints before and after the jointing period to open the hole. The proper application of the seedlings should be delayed and applied less. The early application and reapplication of the thin seedlings should be carried out. Generally, 15 to 20 kg of ammonium per acre should be applied. Manure 500 to 750 kilograms.
â— Booting at booting stage The booting stage is the period when most water is needed. Generally, the water requirement for plant growth at the booting stage of maize accounts for 27% to 38% of the total water requirement for the whole growing period. During this period, the soil moisture should be maintained at 70% of the field water capacity. 75%, to adjust fertilizer with water, to meet the needs of corn growth and development of fertilizer and water.
â— Heavy panicle-fertilizer panicle-fertilizer can not only improve the efficiency of photosynthesis, promote the growth of the leaves on the panicle and several leaves above and below, but also can prolong the life of the leaves and promote the fullness of the grains. The application time of panicle fertilizer is related to the corn variety and soil fertility. In general, early maturing varieties can be seen in 15 to 16 leaves or 8 to 10 unfolded leaves; mid-late-maturing varieties should be applied when there are 15 to 17 visible leaves or 11 to 12 unfolded leaves. The base fertilizer is sufficient and grows vigorously. The plot can be applied with late panicle fertilizer. It is advisable to use a small number of plants in the whole field to start tasseling; the lean growth potential of basal deficiencies is poor, and panicle fertilizer should be applied early. The panicle fertilizer should use fast-acting nitrogen fertilizer. Generally, 25 to 35 kg of ammonium per acre is applied or applied. If urea is used, 7.5 to 10 kg per mu can be used.

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