The maturity of corn needs to go through three stages: milk ripening, wax ripening and ripening. Because corn is different from other crops, the grain is born on the ear, and it is not easy to fall off after maturity, and the post-ripening effect can be completed on the plant. Therefore, the ripening period is the best harvest period for corn; if the stalk silage is carried out, it can be harvested as early as possible at the end of the wax or at the beginning of ripening. Whether the corn enters the full maturity stage, it can be seen from the appearance characteristics: the middle and lower leaves of the plant turn yellow, the leaves of the base are dry, the leaves are yellow-white, loose, and the grains become hard, and the inherent color of the variety is presented. Specifically, it can be judged based on the following aspects. A look at the milk position The law of corn grain filling is: the middle of the ear is faster than the lower part, and the lower part is faster than the upper part; from the perspective of one grain, it is enriched from the top of the grain to the base. In the process of filling and filling, it can be seen from the back of the grain embryo that the color of the top of the grain to the base changes from deep to shallow, and there is a clear boundary line called milk line. According to observation and measurement, when the milk line is at a position 1/3 from the top, the 1000-grain weight is 299 g, which is 90.9% of the grain weight at maturity; when the milk line is at the position of one-half of the grain, the 1000-grain weight is 323 g. It is equivalent to 98.9% at maturity; when the milk line is at the base and disappears, the 1000-grain weight is 329 grams, reaching a maximum. Second, see the number of green leaves According to the investigation, when the leaves of the ear are yellow and yellow, there are still 7 to 8 green leaves in the upper part of the plant. The 1000-grain weight is 318 g, which is equivalent to 92.9% of the weight of the ripening. When the ear is yellow, the plant has 5 pieces. Harvested on the left and right green leaves, the thousand-grain weight is 333 grams, which is 98.8% of the weight of the ripening; when the ears are yellow and loose, the plants are harvested with only 1 or 2 green leaves, and the highest 1000-grain weight is 345 grams. Third, see the grouting time According to the results of corn stage harvest, the maximum value of 1000-grain weight was 344 g after 50 days of pollination; the granule weight was 337 g at 45 days after pollination, which was equivalent to 98.8% at maturity; 40 days after pollination, the 1000-grain weight was 313 g, equivalent to 90.9% at maturity; after 50 days of pollination, the grain weight began to decrease due to respiratory consumption. After 55 days of pollination, the 1000-grain weight was 336 grams, a decrease of 1.8%. According to the "three look", it can be judged that 45 to 50 days after corn pollination, the grain milk line begins to disappear, the ear leaves are yellow and loose, and the green leaves of the plant are harvested no more than 5 pieces. The corn yield is high, the quality is good, and the income is large. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Zhuhai Mingke Electronics Technology Co., Ltd , https://www.zhmkdz-electronics.com