Corn is vulnerable to frost, water corn, moldy grains, affecting yield, reducing quality, and poor quality. Therefore, effective measures should be taken to strengthen the management of the field in the later period, especially to supplement the fertilizer early and promote the maturity of the corn before frost.
Unplug the empty stalks and small plants. In the corn field, some plants do not form powdery stalks due to factors such as powder, and some low-sized small corn not only absorb water and consume nutrients in vain, but also compete with normal plants for photosynthesis. Therefore, plants and small plants that are not knotted should be removed, and effective nutrients and water should be concentrated to supply normal plants.
Remove the ineffective spikes. Corn can grow several ears, but only one is mature, and no more than two. Some of them have only a few grains on their ears, and they are still immature. The masses call it "big cockroaches". They must be cut off to ensure that the main ear grain is full and the weight of one hundred grains is increased.
Artificial pollination. Artificial pollination of corn can make corn not bald, not lacking in grain, large in size, full in grain, and early in maturity. The pollination time is carried out at 8-10 am, and continuous pollination is carried out 2 to 3 times, and the effect is very good.
Early fattening. The production practice proves that it is the jointing period when the corn grows 6-8 leaves, which is the peak period of fertilizer demand. Combined with the second shovel, 150 kg of ammonium nitrate per hectare, or 120 kg of urea, and the external application of zinc sulfate 1.5 In kilograms, the baldness can be reduced; after the silk is spun, the soil fertility is insufficient, and the lower leaves are yellow, and the de-fertilization is more obvious. It can be applied with nitrogen fertilizer or sprayed with 0.4%~0.5% potassium dihydrogen phosphate to supplement the attacking fertilizer.
Stand the stalks and dry the skin. This method can promote early maturity of corn for 5 to 7 days, reduce corn moisture by 14% to 17%, increase yield by 5% to 7%, and at the same time improve quality and improve quality. The time for drying the suede is very important. It is usually carried out in the middle and late stages of waxing, that is, when the kernel has a hard cover. It is unfavorable too early and too late, affecting the filling too early, reducing the yield; losing meaning in the late. The method is relatively simple, that is, the corn leaf is opened, so that the whole grain is exposed, but be careful not to break the ear stem, otherwise the yield will be affected.
Put the autumn ridge and take the big grass. The autumn ridge can activate the loose soil and eliminate the weeds. Put the autumn ridge, take the big grass in the late stage of corn grouting, shallow sputum, in order not to hurt the roots, is conducive to ventilation and light transmission, improve ground temperature, promote early maturity, increase production.
Dismantle the male flower. When the corn is pollinated, when the male flowers wither, all the male flowers in the whole field are removed in time.
Beat the bottom leaf. At the late stage of corn growth, the bottom leaves are aging and have lost their functional function. They should be destroyed in time to increase the ventilation and light transmission in the field, reduce nutrient consumption and reduce disease exposure.
Late harvest at the right time. Generally, it is not frozen and not harvested. This can fully exert the post-ripening effect of corn, can fully mature, increase production, improve quality and improve quality.
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