Fertilizer and water management in autumn corn jointing stage

Autumn corn is currently entering the middle and late stage of jointing and booting stage. This is the fastest growing period of corn growth and the key period of fertilizer and water management. The following points should be focused on:

To reapply the ear fertilizer to obtain high yield of autumn corn, it is necessary to grasp the ring of re-application of panicle fertilizer, the dosage is 50%-60% of the total fertilization amount, and the time should be in the stage of floret differentiation of the ear, usually after emergence. 35 days is the best. It can be used for 10 to 15 kg of urea per acre, or 35 to 40 kg of ammonium bicarbonate. Generally, deep application is carried out by burrowing the roots, and the soil is covered after application. In case of dry weather, watering or furrow irrigation should be used to prevent drought after fertilization, so as to promote the rapid dissolution of fertilizer for corn absorption and utilization.

According to the test, the application of granular fertilizer in autumn corn can generally increase yield by about 20%. Granular fertilizer should be applied lightly and skillfully, and the dosage should be about 10% of the total topdressing amount. In the field where the panicle is insufficient, and the leaves are yellow, green and early, the grain fertilizer can be applied more appropriately; otherwise, the application can be applied less or not.

Generally, after tasseling, depending on the growth of corn, it is appropriate to apply 5 to 7.5 kg of urea per mu. In this period, the water consumption is large, and the watering is not timely, which will lead to “card neck drought”, affecting the development of female and tassels. Seriously, the tassel can not be extracted, or the time interval between the male and female ears is prolonged, and the pollination cannot be performed normally, which greatly affects the yield. Therefore, it is necessary to timely water and drought. (Farmers Daily)

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