Key Technical measures for increasing yield in the later stage of planting Maize

In order to obtain high yield of maize, the following four key techniques should be done well in the later growth stage.

First, after pulling out the booting ear of empty stalk corn, we should seize the time to pull out the empty culm plants that are weak in growth, slender plants, not budding or although budding, but the ears can not grow and are not silked and pollinated, and used as green fodder. This can improve the ventilation and light transmission conditions in the field, reduce fertilizer consumption, be conducive to the normal growth and development of plants, and promote the formation of large ears and large grains.

Second, the heading and flowering stage of drought-resistant and waterlogged corn is not only the period of the most water demand in the life, but also the critical period of water demand of corn. In this period, such as less rainfall, dry air and dry soil, plant root activity is blocked, maize pollen and stigma are easy to lose water, resulting in a decline in vitality, affecting pollination and fertilization, resulting in a decline in yield. At this time, timely irrigation should be made to enhance the vigor of maize plants, improve the photosynthesis of maize leaves, promote the transfer of nutrients to the ear, and the overall development of the ear, so as to prevent grain abortion at the top of the ear. Therefore, irrigation and drought prevention at flowering stage and timely topdressing are important technical measures to obtain high quality and high yield of maize. At the same time, if there is a lot of rainfall, high soil and air humidity, or even waterlogging in the field, the root activity is blocked, which is not conducive to flowering and pollination, affecting pollination and fertilization. therefore, after the heavy rain, we should check the field and clear the ditch in time to eliminate waterlogging in the field and prevent waterlogging.

Third, artificial castration of corn means that when the male ear has just come out and the powder has not been dispersed, the male ear of part of the plant is removed manually according to a certain proportion. It is best to remove the male ear of early male ear plants, weak plants, disease and insect plants before male removal. The proportion of castration can be done by alternate lines, or by two rows or by one line, or by the same line. The principle of going male is: go to the weak and stay strong, go to the edge of the ground, go to the leeward and stay on the windward side; there is a lot of weather, but the weather is bad. Generally, the number of castrated plants should be controlled at 35% of the total number of plants in the whole field.

Fourth, the auxiliary pollination corn is the same plant different flower crop, the natural hybrid rate is very high. Artificial pollination can make up for the late pollination of filaments at the top of the ear, overcome the influence of unfavorable factors such as drought or excessive rainfall, reduce baldness and grain deficiency, achieve large grain fullness and increase yield.

The specific method is: when the corn is blooming and shredding, choose the sunny morning without strong wind, wait for the dew to dry, when the male flowers disperse a large amount of powder, use the long rope to pull vertically with the row to carry on pollination, or use the T-frame to promote the corn plant to disperse the powder. Once every 1-2 days, 3-4 times in succession, the pollination requirements can be met.