Cold freezing damage prevention technology 1 timely precipitation. The weather in the northeastern region is fine in autumn with less rainfall and relatively low relative humidity. The balance of corn seed moisture is between 14% and 15% between September and November. Therefore, in the northeast, we must seize the opportunity of high temperature from September to October, and use natural drying methods to prevent the moisture content of the anti-maize seeds from falling below the critical moisture level before the winter comes. Practice has proved that corn seed moisture content in the Northeast can be safely reduced to winter by 14% to 16%.
First of all, it is necessary to reduce the water content of the standing poles before the corn seeds are harvested. The optimum timing for standing poles is mid-wax ripening. It is generally conducted 10 to 20 days before the harvest in the middle and early September. In addition, when corn seeds are harvested, they are harvested at the right time, and the sorghum is allowed to dry. The critical period for early harvest is timely at the end of the milk-mature period. It is ideal to harvest in wax ripening period. The sorghum drying is done after harvesting the male parent from the ground, about 33cm, cutting the mother line from the ground, holding it up and hanging, 2 or 4 hanging, and hanging on the father's line to carry out field ventilation. . Before the corn seeds are put into storage, the moisture content should be reduced to below 20%, and preliminary drying should be done from the surface. Commonly used methods include standing, wooden hanging, air drying (hanging in the shed) and spreading sun. Comparative tests have shown that it is advisable to stand with a tie. The method has the advantages of uniform distribution of the ears in the space, good conditions of wind and sun exposure, downward ear drops, less accumulated water after the rain, quick drying, material saving, and small footprint, which can be widely used. Other methods can be selected according to local conditions.
2 Reasonable storage. After the corn seeds are initially dried, they must be stored in the ear during storage. Because of the large porosity of the maize ear, it is convenient for further ventilation and precipitation. Maize floor storage can be used when the species is the largest. The corn house is made up of orange or tree strips and braided into a rectangle or circle. Its size varies with the number of seeds and the amount of water. General length 3 ~ 4m, width but 1.5 ~ 2m, high 2 ~ 3m, round warehouse diameter of 3 ~ 4m. The main column was fixed with square timbers, and the bottom of the warehouse was set at a distance of 1m from the ground. The top cover was equipped with a shelter.
When corn is put into storage, attention should be paid to picking, picking out ripening spikes with high moisture content and continuing drying. If the moisture content of the seeds in the storage bin is higher than 20%, it should be carried out after 7 to 10 days, and the positions of the spikes in the bins should be replaced. If the seed moisture content is below 20%, it is generally not necessary to dump the position, and it can be stored until the spring beforehand and threshed.
Use less farmer households. It can be stored on the volcano wall by hanging ears. Do not hang the ear close to the northern wall to inflict low temperature damage on the corn seed caused by the intrigue of the northern wall frost. The seeds that have been threshed should be further sun-dried, sun-dried, packed in sacks, put on fire, and turned regularly. Do not arbitrarily change the storage in the room or warehouse, so as to avoid a hot and cold, rapid temperature changes, causing seed freeze damage, reduce seed germination.
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