In order to win the high yield of post-disaster maize, strengthening the field management of corn is particularly critical. Through careful field management, to reduce the empty culms and ear tip (bald ear), improve corn yield, the specific field management measures are as follows: First, clean gutter drainage. Corn is afraid of drought but it is not resistant to soiling. The long-term waterlogging of corn will not only rot the roots, rotten leaves, but also cause diseases, especially in the pollination period, it will affect the pollination. Therefore, it is necessary to dredge Tiantougou, Weigou and Yaogou to eliminate waterlogging and promote the normal growth, development and maturation of corn. Second, shift thick and thin, timely support seedlings. Immediately after the disaster, the weak, sick, poor, white seedlings were removed, and there were plots of ridges and shoots that were short of seedlings. The seedlings were transplanted with seedlings to make up the seedlings or thickened and thinned. For blisters and lodging of corn seedlings, saplings and leaf washing should be combined. Third, weeding and weeding. Many rains in the seedling stage of corn will cause various weeds to prosper. When the surface is white after reclamation, we must step up the cultivating and weeding and remove the compaction. The cultivator in the seedling stage should be shallow, usually 2-3 times. 4. Early recovery of Miao Fei. Maize is a crop with a large amount of fertilizer. Due to floods and floods, soil nutrients are severely lost and the seedling potential is relatively weak. Therefore, during the 5-6 leaf stage of maize, 5-10 kg of urea per hectare may be topped up, and the big bell mouth period See corn growth, topdressing urea 15-20 kg per acre. Maize ear should be supplemented with appropriate amounts of micronutrients at the appropriate time. Generally, 0.2% zinc sulfate is sprayed on the whole plant per acre, sprayed once every 5 to 7 days, and sprayed twice. V. Prevention of pests and diseases. Due to the accumulation of water in the fields, the soil moisture is saturated, and the air humidity is high, and various diseases such as stalk rot, spot patch, and corn borer are easy to occur. For the diseased corn field, it is necessary to spray once every 10 days and apply a total of 2-3 doses of the drug. The agents are diazepam, zeozin, and carbendazim. Prevention of corn borer, generally to enter the end of the heart of the bell that is big season, spraying 40% of the water in the upper part of the 1000-1200 times emulsion of acephate EC to kill young larvae. Six, emasculation and artificial assistant pollination. Interlaced. Before pulling out the tassel about 10 centimeters, before the pollen has spread, grasp the tassel with your hands and pull it up. Be careful not to pull or hurt the leaves. The emasculated plants must not exceed 50% of the total number of plants in the field, and the scarce plots should not exceed 35%. During the flowering and pollination of maize, for the plots where pollen deficiency and flowering time do not meet, it is necessary to seize the favorable opportunity to carry out artificially assisted pollination, and to adopt border cultivation to enhance opportunities for insemination.
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