The practice of production over the years has proved that grasping the late-stage fertilizer and water management of autumn corn is an important part of winning high yield of autumn corn. This year's autumn corn seed planting area is more, but due to the rainy weather during the growth period, the humidity in the field is large, the unbalanced root growth is poor, and the plants are shorter. At present, it has entered the stage of jointing and booting, and the jointing and booting stage of autumn corn is the key phase of growth and development in corn. It should grasp the following three management measures. First, heavy ear fertilizer. Because the demand of autumn corn has the characteristics of less early stage and more late stage, in order to obtain high yield of autumn maize, it is necessary to reapply the tapping fertilizer to meet the demand for nitrogen fertilizer from tasselling to maturity. The time of application of panicle fertilizer should be in the period of differentiation of the panicle spikelets, the best effect. It is generally applied 12 days before tassel drawing, that is, it is best to administer panicle fertilizer 35 days after emergence. Apply 40 kg of ammonium per acre or 15 kg of urea. In case of dry weather, fertilize or water irrigation (flood irrigation) after fertilization to promote rapid decomposition and absorption of fertilizer. Second, suitable for fertilizer application. Due to the high temperature in the early stage and the short growing period, the autumn corn has shorter vegetative growth period and insufficient growth, and the plants are short and small, and the photosynthesis area is relatively reduced. Therefore, it is very important to apply granules. The application of fertilizer should be after tasseling, flowering silking period, depending on the growth of corn, Mushi urea 5-8 kg. Third, control locusts. The late-stage infestation of autumn corn is mainly caused by corn borer, which seriously affects the quality of fresh-ear corn ear. At the end of the graves and rice leaves, 150 ml of BT emulsion, 1 kg of water, and 15 kg of rain and sandy soil, are formulated as particle worms. After the sunny afternoon, 80% of dichlorvos emulsion is applied 800 times, 75 kg per mu. Spray on the top of the ear of the ear of corn and the leaves on the top and bottom of each ear. China Agricultural Network Editor
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