Early corn promotion measures
First, cutting off empty stalks and small plants There are always a certain amount of empty stalks and small plants in the corn field. They not only consume nutrients and water, but also affect the ventilation and light transmission. For such empty stalks and small plants, they should be found once Cut off immediately. Second, remove the ear of ineffective corn can grow a few ears, but only 1 to 2 mature, each corn plant is best to retain the top of the ear, the rest of all removed. If you develop well, you can keep the second ear in the upper part to ensure that the main ears are full. Third, the use of artificial castration in corn production using castration technology can effectively reduce the apical dominance, adjust the rational distribution of nutrients, can effectively reduce the empty stalk rate. The method of detasseling is: When the tassels are exposed, the intercalary or septum pulls out the tassel and should not damage the functional leaves. Let the adjacent row of smallpox pollen fall on the filaments of the corn plant that has been pulled out of the smallpox to form cross-pollination, which can increase production by 10% to 15%. After emasculation, only half of tassels remained in the whole field. After pollination was completed, the remaining half of the tassels were removed to reduce the consumption of nutrients and to increase grain weight. 4. Artificially assisted pollination of maize is an out-of-breed crop. Artificially-assisted pollination not only increases the panicle length and panicle size, but also makes the grain plump and can increase grain weight. The method is during the silk spinning of corn, every day from 8 to 10 am (after the dew is dry), the male flower is shaken with a bamboo pole or pull rope, pollinated while collecting powder, once a day, pollination is continued for 2 to 3 times. It is conducive to scattered pollen, increased pollination opportunities and improved seed-setting rate. Fifth, the clever application of "attacking granular fertilizer" Corn from the jointing to the ear silking fertilization to the booting stage, is the most prosperous growth period, if the soil fertility is insufficient, the lower leaves yellow, appear de-fertilizer, will seriously affect the yield, should be timely The top-dressing attacking granules, but to grasp the principle of early application, less application, generally no later than the silking period, the amount of fertilizer does not exceed 10% of the total fertilizer. Generally, 5-6 kg of nitrogen fertilizer can be applied per acre, or 2-45% of potassium dihydrogen phosphate can be used for foliar spraying. If the soil is fertile and there are more top-dressing in the ear period, the growth of corn is good, and there is no de-fertilization, then there is no need to resort to granular fertilizer to prevent late-maturing glutinous rice. Sixth, station stalk stalk skin drying stalk stalk skin drying can accelerate dehydration, promote precocity, increase production. Experiments have shown that drying corn stover stalk skin 15 to 20 days, corn can be precipitation 14% to 18%, precocious 5 to 7 days, an increase of 5% to 7%. 7. Destroy the bottom leaves of the bottom leaves at the later stage of the childbirth, withering and wilting, and have lost the function of the leaves. It should be promptly knocked out, increase the ventilation and light transmission in the fields, reduce the incidence of diseases and insect pests, and reduce the consumption of water and nutrients. 8. After the corn grouting, the ridge rakes can be used to loosen the topsoil, increase the ventilation and light transmission, increase the ground temperature, and promote the early maturity. At the same time, they must also take the large grass to prevent competition with the corn for nutrients. Nine, the timely harvest The best time for harvesting is the ripening period, when the harvest yield is the highest. The characteristics of ripening period are: the majority of plants from the green leaves turn yellow to yellow, harden the grain, obvious and shiny keratin, no depression in the nail file, cross-section of the grain and cob at the black layer, the disappearance of grain milk . Harvesting prematurely will reduce the yield, and the stalks will be too late to affect the sorghum sowing.
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