At present, after the beginning of autumn, the corn is gradually harvested. It is well-known that premature corn harvest and insufficient grain filling can lead to a reduction in grain weight and a decrease in grain yield. If harvesting is too late, it will cause nutrient backflow and bring about unnecessary losses. Proper late harvest will increase grain weight and reduce losses. Improving corn production and quality is an increase in production without increasing costs. Data show that timely harvest of corn can increase production by more than 100 pounds per mu.
So, what period of corn harvest is considered "property late harvest"?
In a word, the ripening period is the best harvest period for corn, not the yellowing of the eucalyptus leaves that the growers thought.
How do you know if corn has entered the ripening period? In production, the black layer is generally used as a sign of corn maturation. However, factors such as hail, early frost, and diseases will induce premature appearance of the black layer of corn kernels. In addition, during the grain filling period, continuous cold weather above zero degrees Celsius will also induce black layers. Therefore, it is necessary to combine information such as yellowing of loquat, disappearance of milk line, and appearance of black layer to judge the ripening period of corn.
From the aspect of appearance, the middle and lower leaves of the plant have turned yellow, the base leaves are dry, the corn glutinous leaves are yellow-white, dry and loose, the grains harden and shiny, the milk line disappears, and when the black layer appears at the bottom of the grain, it is fully cooked. Period, when the harvest yield is highest.
Under normal circumstances, according to the normal fertility of corn, it is appropriate to postpone the harvest by about 10 days after the corn has turned yellow. The habit of harvesting 40 to 45 days after pollination of maize was changed to about 55 days after pollination, making full use of the late autumn climate and the climatic resources conducive to the accumulation of dry matter, and extended the corn filling time to give full play to the corn grain potential.
Due to the differences in the field management methods among the farmers, the corn harvest period is not the same, and the corn harvest period also needs to be determined according to the actual situation.
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