1. Appropriate top dressing method
During the silking period of corn. Each acre with ammonium nitrate l0? Open ditch chase. Or with 0.2% -0.3% potassium dihydrogen phosphate solution or 3% superphosphate calcium leachate) called surface spray. If the silking period has been postponed, it can be passed through by intervening males to reduce nutrient consumption and increase the temperature of the leaves, thereby speeding up the fertility process; the silking period can generally be advanced 2-3 days earlier. Not only the harvest time can be about l0 days in advance. It can also effectively increase production.
2, peeling rod method
It is carried out when the kernels of the corn wax begin to harden. That is, in the late corn filling stage, when the grains reach a normal size, the loquat leaves are peeled off lightly to expose the grains and promote dehydration and drying. In this way, generally about 1 week earlier than the normal ripening period, than the direct harvest at the same time increased yield 6% -15%.
3, cutting top method
That is, the upper leaves of the ear are cut off at the middle and later stages of the wax ripening. This method has a certain impact on the yield, the earlier the cut, the more the reduction in production, so cut tip can not be earlier than the wax early stage. In addition, two large leaves should be left above the ear to benefit photosynthesis and supply nutrients to the plants.
4, except for invalid spike
Suitable for single ear varieties. That is, except for the upper ear, the second and third ear of the corn plant should be removed if they are late in development and have a late spit. In addition. Insufficient density or lack of water and fertilizer, often produce sterile sterilized "empty stalk" plants and some dwarf diseased plants in the corn field. These should be removed. To promote premature corn. Not only can save nutrient attack big spike. Lee also breathes light and promotes premature maturation.
5, Plow spray method
During the corn filling period. Use a hoe or plow to plow over both sides of the ridge; or during the corn ripening period. Use a long-805 oil booster 500 times foliar spray. It can have an ideal effect of promoting ripening production.
6, the whole plant digging method
In the late stage of maize wax, the sowing dates of wheat and other crops have arrived, but corn is still not fully mature. The corn stalks and panicle roots can be picked up together and transported out of the ground. It is piled up and accumulated for a period of time so that part of the nutrients in the stem can be returned to the grains. After the leaves dry, the ear drying and threshing will generally increase the grain weight by about 20%. After planing to remove corn, protect the earth immediately. It is not only conducive to premature corn production, but also can be planted ahead of time. Http://
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