There is an optimal period for wheat harvesting - at the end of the waxing stage, when the harvested wheat has the highest 1000-grain weight and yield. Harvesting too early or too late can result in thousands of grain weight and reduced yield.
In recent years, researchers have studied the grouting rates of several varieties such as Wenmai 6, Yumai 18 and Xin 3306, and the maximum 1000-grain weight at the end of wheat waxing. After three days of harvesting, the average weight per thousand weight is reduced by 0.3 to 0.4 grams per day, and harvesting begins on the fourth to fifth days, and the average weight per thousand is reduced by 1 to 1.2 grams per day. If each acre is calculated according to 350,000 to 400,000 ears and 35 grains per ear, each kilogram of weight is reduced by 1 gram, and the yield per acre is 13 to 15 kilograms.
There are two reasons for the high harvest yield of wheat at the end of waxing: First, wheat is in a slow filling stage before the end of waxing. If harvested at this time, the grain filling is not sufficient, and artificially causing the 1000-grain weight of wheat to fall; if after the wax is cooked, Harvest, because the grain has stopped grouting, and the plant is still breathing, energy consumption leads to nutrient backflow, and the 1000-grain weight of the grain is reduced. At the same time, wheat often encounters rainy weather in the late growth stage, which not only causes the contents of the granules to be leached, but also reduces the 1000-grain weight of the granules, which often causes the germination of the wheat ears, or causes the granules to be rotted, which seriously reduces the yield and quality of the wheat. Second, at the end of the waxing stage, the wheat is golden yellow in the lower part of the ear, and is slightly greenish. At this time, the harvest is not easy to break the head and drop the ear.
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