It is now in the spring production season that a small number of farmers have problems such as acidification of seeds and poor sprouting due to improper handling during soaking and germination. Therefore, when soaking germination should pay attention:
1, drying seeds: soaking seeds in the previous week, select the sunny days to dry the seeds for 3-4 hours or half a day, and then put the sun-dried seeds in a dry, cool place to cool the heart to promote the respiration of the seeds and enzyme activity, which will help improve Seed germination rate and germination potential; Shaizhong can also kill some pathogens attached to rice hulls. It is better to burn seeds on bamboo or mud, but it is not possible to directly spread the rice seeds on the cement floor or slate to sunburn and injure rice seeds.
2. Seed selection: It is required to use clean water to select seeds, remove fish floating in the surface of the valley, and use full rice seeds to cultivate neat and robust seedlings. Since most of the two-line hybrids have poor plumpness and high seed prices, they must fully use the seeds that are not full. It is best to sow germination individually, and focus on nursing in order to cultivate a neat and strong seedling. If seeds are sufficient, it is not necessary to use semi-solid seeds.
3, soaking disinfection. After washing the seeds with clean water, put it in clean water and pre-soak for 12 hours (change the water every 4-6 hours or so before washing, and wash the seeds) to germinate the germ spores attached to the seeds, and then reuse it 300 times. The strong chlorine essence should be soaked for 12 hours. The disinfectant should be one inch above the surface of the seed (do not change the water during disinfection), and then the residual liquid should be washed repeatedly with clean water. After washing, continue to soak in fresh water for 12 hours and then pick up the germination.
4. Pregermination: Many farmers like to germinate seeds in a woven bag. Even if the temperature does not come, the seeds will be exposed to the sun and often cause burning. The best method is to use a double-layer, disease-free, moist sack to germinate, lay a layer of disease-free straw on the ground, spread a sack, lay the seeds evenly on top, and then cover the other sack over it, only halfway Pay attention to whether to add water. It can also be packed in sacks or baskets. Straw insulation can be used around the straw. After the grain is warmed, the temperature is controlled at 35-38°C, and the temperature is too high to turn the pile. If the temperature is too low, the warm water temperature should be raised. After about 20 hours, the grains can be exposed white.
5, timely sowing: grain dew after the thermostat to 25-30 °C, appropriate temperature germination and promote root until the bud long half grain, the root length of a grain when you can sow Shimoda. In the pregermination, it is necessary to pay attention to the change of the temperature of the grain at any time to prevent the temperature of the grain from being too high or too low. If the temperature is too high, the seeds will be burned. If the temperature is too low, sour and stinky wine will be produced, which will affect the germination rate.
6. Sprout: Before sowing, the seeds of good buds should be spread out and sown at room temperature for 3-6 hours after sowing. Make grain adapt to air temperature and increase seedling rate.
7, sowing methods: At present, the main use of water and dry seedlings. For healthy, plump, strong germinating seeds, water and drought can be used. For seeds with poor color and plumpness, weak germination, and even pathogenic bacteria, it is best to use dry seedlings. The seedlings cultivated in the dry season have the characteristics of dwarf seedlings, strong root activity, and strong cold resistance. They grow rapidly after transplanting, have strong tillering, improve the spike rate and seed setting rate, and can not only be planted early and planted early, but also mature earlier. It can save paddy fields, films, seeds, labor, fertilizer input and water consumption.
8, to prevent rotting: rotten roaches are rotten species, rotten buds and dead seedlings. With roots in the green, the rotten buds take root before the green. Dead seedlings occur after the roots are green, especially at the 2nd and 3rd leaf stages. The prevention and control measures for the grubs are as follows: First, the pesticides are sprayed and sterilized, and the soil bactericidal is mainly used for enemy cough (1:500) and copper sulfate (1:1000). 150kg of coarse mist sprayed onto the surface of the mixture; second, timely prevention of water-borne dead seedlings; and third, flushing with rainwater during the shoot, exposing bare shoots, filling the cover, or flushing the car with a thin slurry, which can be improved Seedling rate; Fourth, it is appropriate to dilute sowing, and it is necessary to cultivate the strong and strong.
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