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Wheat seed selection and disinfection
Selecting wheat before sowing can improve seed quality, eliminate mildew, increase germination rate, and achieve the goal of rapid emergence, emergence of seedlings, and emergence of strong seedlings. Wind election. The use of windmills or natural winds for seed selection can be used to select pods, granules and diseased granules. filter. With a sieve of about 2.7 millimeters in diameter, the small particles, lumps, stones, stones and other impurities can be screened out to make the grain of wheat used for planting full. Yellow mud water selection. Add 15-20 kilograms of yellow clay (clay) per 50 kilograms of clean water. Stir well and pick out the impurities. Then add the selected or selected wheat seeds (the mud surface is higher than the wheat) until the wheat is grown. After sinking, remove the diseased grains, grains and impurities floating on the surface of the mud, and then pick up the wheat seeds, wash them with clean water, dry them after sowing, and select the fine-grained soils to choose sunny weather. Do not be overcast. Day or rainy days to prevent germination or mildew deterioration. Grain selection. According to the color, size and shape characteristics of wheat grains, moldy grains, small grains, grains, diseased grains, hybrids and other miscellaneous materials are selected by hand to ensure the quality of the seeds and prevent the seeds from mixing and reducing production. Sowing and disinfecting seeds can kill various pathogens attached to wheat seeds, such as head smut, head blight, rust, and powdery mildew, so that the wheat seedlings are strong, have early growth, and seize high yields. Disinfection usually has the following four methods: First, the purchase of species. Do not choose to sow in sunny high-temperature weather for 1-2 days, both to eliminate mold gas and sterilization, but also can kill a variety of pests. However, it should be noted that drying in the tarpaulin or soil rice field must not be done on the cement drying field. The second is seed dressing. Seed 15-20 days for seed dressing with powder rust to inhibit the occurrence of diseases such as rust and powdery mildew. Each kilogram of wheat seed was washed with powdered rust, thoroughly mixed with a seed dressing device and sealed for 1-2 days. The third is soaking in lime water. Seed 7-10 days, use 1 kg of lime, first with a small amount of water to open, then put it into a cylinder or bucket, then add 100 kg of fresh water, stir well and soak the seed 60-70 kg. After 24 hours of soaking, remove the wheat seeds and wash them with water to dry. This method should pay attention to: Lime to use white or block of new lime, should not be used for a long time or has been absorbing moisture disintegration of loose lime. Do not stir during soaking, so as not to affect the effect of the lime film layer formed on the surface of the water (this film layer can insulate the air and cause the bacteria on the grain to die due to lack of oxygen). The fourth is temperature change method. The wheat seeds were first soaked in 50-55C hot water for 10 minutes, picked up and put in cold water for 5 minutes, and then placed in 55-60C hot water. This is repeated several times, from hot to cold, and then from cold to hot, so that the bacteria died due to unsuitable emergency water temperature changes. Finally picked up and dried for broadcast.