Summer storage technology of corn seeds

Corn is a large-volume, large-embryo seed that is prone to fever, accounting for more than 30% of embryos, accounting for 10% to 12% of grain weight. Because of the vigorous breathing of large seeds, it is better than other grasses under the same water and temperature conditions. Grain seeds have a high respiration intensity, which causes the seeds to deteriorate due to heat. In addition, the corn seed embryo also contains more soluble sugar, and the seed coat is thin, so the probiotics cause the seeds to deteriorate.

The change rule is that the first step of the corn seed is swelled after the moisture absorption, the color is bright, and the blisters are formed in the embryo, but it is generally difficult to see. The second step is to sweat back and sweat, and the embryos are covered with gray hyphae, which is soily. The third step can smell the smell of alcohol. If the climate is not normal, it will heat up after three or four days, the embryo becomes light yellow, and the gray hyphae hanging on the embryo is green, which has affected the seed value. After treatment, the embryos become green or black after three or four days, and the whole grain becomes black and loses its use value.

Storage technology. According to the nature and variation of corn seeds, the storage methods usually use the ear storage method and the grain storage method. However, the ear storage method accounts for a large volume and has a low utilization rate. Therefore, the summer storage often uses a grain storage method. When the temperature is between 15 ° C and 25 ° C, the water content should be below 14%. According to the test, the moisture content of corn seeds is reduced to 12.5%, the vigor of seeds stored in 0.5 to 1.5 years is over 99%, and the germination rate is 97% to 98%. The most effective measure to reduce seed moisture is ventilation.

Regular inspection, to achieve three temperatures and two wet, so that the seeds are in good condition. The three temperatures are the temperature, the temperature of the warehouse, and the temperature of the seed. Under normal circumstances, the main factor affecting the temperature change of the seed is the temperature of the warehouse, and the temperature that affects the temperature change is the temperature. When the temperature is low and the temperature is high, the exhaust fan can be started in the early morning to form a negative pressure in the chamber, and the cold air enters the seed pile from the vent, so that the seed is cooled, and the seed water content can be lowered. Two wet, wet and wet. The humidity in the warehouse is closely related to the water content of the seed. Under certain temperature conditions, the moisture absorption and moisture dissipation of the seed depends on the relative humidity in the warehouse. The wetness is affected by the humidity. Therefore, according to the change rule of three temperature and two humidity, reasonable ventilation or closed warehouse, keep the temperature and humidity in a low state, so that the seed in the low temperature and dry environment can prolong the seed life.

Insect and rodent. Insect control is a big problem for the storage of seeds in summer. The worms that harm the seeds mainly include rice elephants, big grain thieves, small grain thieves, wheat moths and pink mites. Most worms like to grow and breed in warm and humid places, so they can control the worms by reducing the temperature and humidity in the warehouse. occur. Most worms have a habit of preferring to move on the top surface. According to this feature, a check can be made on the surface of the seed. When the seed is infected with worms, it should be fumigated according to the type and degree of damage of the worm, or it can be trapped with bait, that is, the fried wheat bran is sprayed with 5% dichlorvos or 10% trichlorfon and dried. It is placed on the surface of the seed where the worms are often active and around, which can effectively kill the pests. In addition, before the seed is put into storage, it is fumigated with aluminum phosphide, the dosage is 1.5 g/m2, and after being smoked, it is sealed for 36 to 72 hours, and then it is ventilated and poisoned, which can also play a role in preventing pests. Anti-rat, put the rodent in the place where the rats are often active, to ensure that the seeds are not damaged.