The practice of production over the years has proved that grasping the late stage fertilizer and water management is an important part of capturing high yield of autumn corn. This autumn corn seed planting area is more, but due to the influence of rainy weather during the growing period, the field humidity is large, the growth imbalance root system is poorly developed, and the plant is short. At present, the jointing and booting stage has been entered. The jointing and booting stage of autumn corn is the growth and development period of corn in the whole life. The following three management measures should be taken.
First, heavy application of panicle fertilizer.
Because the fertilizer requirement of autumn corn has the characteristics of less early stage and more late stage, in order to obtain high yield of autumn corn, it is necessary to re-apply the ear attack fertilizer to meet the demand for nitrogen fertilizer from the tasseling stage to the mature stage. The time of application of panicle fertilizer should be the best in the differentiation stage of spikelet and florets. It is generally applied 12 days before the tassel, that is, the best application of panicle fertilizer is 35 days after emergence. Apply 40 kg of ammonium bicarbonate or 15 kg of urea per acre. The root empire will open the hole for deep application and cover the soil after application. In case of dry weather, watering or watering after drought application (ditch irrigation) will promote the rapid decomposition and absorption of fertilizer.
Second, suitable for fertilizer application.
Due to the high temperature and short growth period, the autumn corn has shortened vegetative growth period, insufficient growth, small plants, small leaves and relatively reduced photosynthesis area. Therefore, the application of granular fertilizer is essential. The fertilizer should be applied after the tassels are taken, and the flowering and silking period is observed. Depending on the growth of the corn, 5-8 kg of urea is applied per mu.
Third, the prevention and control of mites.
In late autumn maize, the main pests are corn mites, which seriously affect the quality of fresh autumn corn. At the end of the heart of the grave rice, 150 ml of BT emulsion, 1 kg of water, 15 kg of rain and sand, and made into granule pests. After sunny afternoon, use 80% of the 80% dichlorvos emulsion, 75 kg per mu. Spray on the top of the corn ear and on the upper and lower leaves of the three leaves of the leaves.
First, heavy application of panicle fertilizer.
Because the fertilizer requirement of autumn corn has the characteristics of less early stage and more late stage, in order to obtain high yield of autumn corn, it is necessary to re-apply the ear attack fertilizer to meet the demand for nitrogen fertilizer from the tasseling stage to the mature stage. The time of application of panicle fertilizer should be the best in the differentiation stage of spikelet and florets. It is generally applied 12 days before the tassel, that is, the best application of panicle fertilizer is 35 days after emergence. Apply 40 kg of ammonium bicarbonate or 15 kg of urea per acre. The root empire will open the hole for deep application and cover the soil after application. In case of dry weather, watering or watering after drought application (ditch irrigation) will promote the rapid decomposition and absorption of fertilizer.
Second, suitable for fertilizer application.
Due to the high temperature and short growth period, the autumn corn has shortened vegetative growth period, insufficient growth, small plants, small leaves and relatively reduced photosynthesis area. Therefore, the application of granular fertilizer is essential. The fertilizer should be applied after the tassels are taken, and the flowering and silking period is observed. Depending on the growth of the corn, 5-8 kg of urea is applied per mu.
Third, the prevention and control of mites.
In late autumn maize, the main pests are corn mites, which seriously affect the quality of fresh autumn corn. At the end of the heart of the grave rice, 150 ml of BT emulsion, 1 kg of water, 15 kg of rain and sand, and made into granule pests. After sunny afternoon, use 80% of the 80% dichlorvos emulsion, 75 kg per mu. Spray on the top of the corn ear and on the upper and lower leaves of the three leaves of the leaves.
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