Seed germination in hybrid early rice is different from that in conventional early rice soaking and germination. The peasants' friends must master the techniques of precipitating and soaking the hybrid early rice so as to promote good buds: Careful treatment Seeds Hybrid seeds are outcrossed, especially two-line hybrid early rice seeds The glume of the seed of the same three-series combination is thinner, loosely closed, and the cell tissue is relatively loose, which is vulnerable to the adverse effects of the external environment, in particular, it is easy to absorb moisture and reduce the germination rate. For this purpose, seeds should be sun dried for 1 day before soaking and germination, to enhance seed coat permeability, increase enzyme activity, and increase germination rate. When soaking, the seed is first selected with clear water to remove the extremely unsaturated seeds and the seeds with smut. The suitable temperature for soaking seeds of rice germination in science is 32-38°C, and the optimum temperature for germination is 26-28°C. Because the early rice germination temperature is generally very low, it is necessary to grasp the principles of “high temperature breaking of the chest, appropriate temperature and rooting, moisturizing and pregerminating, and cooling and refining budsâ€. A certain degree of heat preservation method is used for germination. The following three kinds of simple and convenient germination are introduced. Methods: Many types of soaking seed germination method. Use 500 times strong Chlorine (2 g strong Chloride to 1 kg of water) to soak seeds for 6 hours, rinse with clean water, and then use gauze bags or air woven bags, and put them in warm water of 35-36°C to soak 2～3 Hours, after hot water, heat and wrap the seed bag with the film, heat and moisturize and germinate, separate it for 7-8 hours, put it in warm water of 35°C, soak for 3-5 minutes, remove and drain, continue to germinate, so repeatedly to break the chest until. This method takes about 48 hours from soaking to breaking the chest and the soaking time should be controlled within 8 to 9 hours. Warm water rapid germination method. Choose a house that is sheltered from the wind, store a layer of straw of 24 to 30 centimeters thick, place the water tank on top, pour 500 times the semen with a temperature of 38°C, and put the gauze bagged seeds into the tank. The film is sealed tightly in the cylinder mouth plus straw or old batting. After 5 to 6 hours, remove the seeds and wash them with warm water at 37°C. Drain the water and cover it with straw. Allow 15 to 18 hours for the seeds to be exposed. About 10% of the seeds are whitened and then soaked in warm water at 35-36°C for 2 to 3 hours according to the above method. Drain the water and expose it for 18-20 hours. About 85% of the seeds were broken in the chest, soaked in warm water of 32-33°C for 1 hour, and then exposed to the broken chest. After leaching and draining with warm water at 35°C, the seeds were soaked on the heat, and the time for soaking seeds was controlled. In 8 to 10 hours. Ash priming method. Soak it in 500-fold strength chlorinated solution for 8 hours, then wash it off with clean water, then use warm water for seeding to raise the temperature of the seed, and then mix and pulverize the coal ash with impurities after sieving. The coal ash is first wetted with boiling water until it is hand-kneaded into a group, and the hand-song is scattered. It is appropriate to mix the heat with the seed-dig and pile up, plus the cover. Each 3 kg of coal ash can be used for 5 kg of seed dressing. When the temperature is too low, boiled water can be filled with large teapots or jars, surrounded by straw, and warmed in the middle of the valley. After about 24 hours, root buds can grow. At this point, turn over and take out the kettle, and then flip it one or two times. The simple germination methods of the above three hybrid early rice hybrids can be used flexibly by farmers. At the same time should pay attention: First, to prevent the grain "now sugar" sliding shell. If the temperature is too low during the rupture of the chest, oxygen is insufficient, the vigor of buds is reduced, nutrients are infiltrated, and microorganisms are infiltrated, causing the buds to have sticky liquor. If this happens, the seed troughs should be rinsed in warm water at 25 to 30°C and re-pulverized. The second is to prevent high temperature burning buds. In the stage of breaking the thorax, the respiration is strengthened and the heat is dissipated. If the temperature of the heap is higher than 40°C, it will cause high-temperature burning. Therefore, pay attention to observation when germination, often turning to prevent burning buds. The third is proper sprouting before sowing. Because the germination temperature is above 25°C, and the soil temperature and temperature in Putian in the early spring are all around 15°C. If the newly emerged bud valley is sown to the field immediately, the young sprouts are susceptible to growth due to sudden temperature drop. Spreading buds in the room for a long time can enhance the ability of sprouts to adapt to external conditions as soon as possible after sowing. Fourth, early rice soaking seed germination technology is strong, operation is inadvertently prone to error, it is recommended that experienced farmers or technicians for guidance, or commissioned agricultural technology station focused on soaking germination. Specially to remind farmers that the use of custom soaking germination method, the two series of early rice seed soaking time can not exceed 10 hours (including strong chlorinated solution disinfection 6 hours); two-line hybrid early rice should not sowing dry valley or non germination sowing; Luliangyou and Zhuyouyou series of hybrids had a small amount of albino seedlings in the seedling stage, belonging to the characteristics of varieties, and did not affect the yield.
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