Maize post-disaster management technical measures

In the summer, natural disasters occur frequently in some areas, causing the destruction of corn fields, which affect corn yield and product quality. To ensure that post-disaster losses are minimized, it is particularly important to strengthen post-disaster field management. The specific management remedies are as follows:

First, timely clean up the broken leaves and reduce the loss of nutrients in the corn plants. The method is: in the event of disasters, cut off the broken leaves of the corn plants with a sickle in time, or clean up the remaining silt and debris on the leaves; after the windstorm, the plants should be properly conditioned and properly shoveled.

The second is to clear the ditch drainage in time. In the case of floods, plants will not only rotten roots and rotten leaves, but also cause diseases, especially during the pollination period, which will affect pollination. Therefore, it is necessary to clear the Tiantougou, the furrow and the lumbar sulcus, and eliminate the water in the field in time to promote the normal growth and development of the corn.

The third is to thicken and replenish and timely support the seedlings. In the event of windstorms, plant lodging or loss of leaves after the disaster, it is necessary to timely carry out seedlings and soil cultivation, clear up the debris in the field, and have the plots of seedlings and ridges, and use the prepared seedlings to transplant seedlings or thicken the soil. Severe plots can replant late-field crops such as buckwheat, mung beans, and cowpea. For the crops and fields that are affected by the disaster, it is necessary to protect the insurance, to check the seedlings and make up the seedlings, and not to easily replant them; for the crops and fields that have been harvested due to disasters, it is necessary to take time and fight the season according to the situation of withdrawal and drainage. Replanting measures, efforts to expand the area of ​​crops such as corn, mung beans, pasture, and vegetables that have market demand, adaptability, and short growth period.

The fourth is to do a good job of cultivating and weeding. The disasters and disasters of corn seedlings will cause various weeds to grow or soil compaction. When the ground is white after the disaster, we should carry out cultivating and weeding to eliminate the knot.

The fifth is to increase the application of fertilizer in time to ensure the demand for nutrients in corn. Corn is a large crop with a large amount of fertilizer. Due to flood disasters, soil nutrients are seriously lost, and the seedlings are weak. Therefore, after the disaster, 5-10 kg of urea can be applied per mu , and the growth of the corn is observed in the big trumpet period. 15-20 kg of urea topdressing, at the same time, an appropriate spraying seedlings to 0.5% potassium dihydrogen phosphate, an appropriate amount of supplementary fertilizer and timely, the whole plant is generally performed per acre sprayed with 0.2% of zinc sulfate, every 5 to 7 days, spray, and even spray 2.

The sixth is to conscientiously prevent pests and diseases and reduce production losses. Due to the accumulation of water in the field, plant damage, soil water saturation, and high air humidity, it is easy to cause various diseases such as stem rot, size spot disease and corn borer. For cornfield disease appears to spraying once every 10 days, drugs were administered 2-3 times, the agent has anilazine, zineb, carbendazim. To control corn mash, it is generally necessary to enter the end of the heart leaf, that is, the big bell mouth period, and apply 1000-1200 times of 40% sulphur sulphur emulsifiable concentrate in the upper middle part to kill the young larvae.

Seven is timely emasculation and manual assisted pollination. The main method is to take the method of interlacing and arbitrarily, and take about 10 cm in the tassel. Before the pollen has not been distributed, grasp the tassel with your hand and pull it up. Be careful not to pull out or injure the leaves. The male plants should not exceed 50% of the total number of plants in the whole field , and the plots with few plants should not exceed 35% . During the flowering pollination, the corn should be seized in a favorable time for artificial pollination. It is necessary to recruit and encourage the insemination opportunities.

    Source of information: Feicheng Agricultural Bureau   Author: Zhao Xuening

 

 

 

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