Seed Soaking and Germination Method for Hybrid Rice

It is now the spring production season, a small number of farmers in the process of seed soaking germination, due to improper operation caused by seed sour smell, bad budding and other problems. Therefore, attention should be paid when soaking seeds:

1, drying seeds: a week before soaking the seeds in the sun for 3 - 4 hours or half a day, and then put the dried seeds in a dry, cool place to cool the heart to promote seed respiration and enzyme activity, conducive to improving seed germination rate and germination potential; drying seeds can also kill some of the bacteria attached to the rice husk. It is better to dry seeds on bamboo or mud ground, but you cannot directly spread rice seeds on concrete floor or slate to prevent sunburn.

2. Seed selection: It is required to select seeds with clean water, remove the rice floating on the surface, and select full rice seeds to cultivate neat and healthy seedlings. Because most of the two-line hybrid varieties are poor in plumpiness and high in seed price, it is best to make full use of the unplumped seeds, and it is best to carry out germination and sowing separately, and focus on nursing to cultivate neat and strong seedlings. Semi-full seeds need not be used if there are sufficient seeds.

3. Soak seeds and disinfect them. After washing the seeds with clean water, put them into clean water for pre-soaking for 12 hours (change the water every 4-6 hours during the pre-soaking period, and wash the seeds), so that the spores attached to the seeds germinate, and then soak them with 300 times stronger chlorine essence solution for 12 hours. The disinfectant solution should be one inch higher than the surface of the seeds (do not change the water during disinfection), and then wash the residual solution with clean water repeatedly. After washing, continue to put in water soaked for 12 hours, and then pick up germination.

Germination: Many farmers like to put seeds in woven bags to germinate, even because the temperature does not come, the seeds are exposed to the sun, often causing burning buds. The best way is to use double-layer, disease-free, wet sacks to germinate, a layer of disease-free straw on the ground, a sack spread, spread the seeds evenly on top, and then cover another sack on top, only a little attention to whether to add moisture halfway. Can also be packed into sacks or baskets, surrounded by straw can be sealed insulation. After the grain is heated, the temperature is controlled at 35 - 38 ° C, the temperature is too high to turn over, and the temperature of the warm water is too low to increase. After about 20 hours, the grain seed can be exposed white chest.

5, timely sowing: after the grain is exposed to white, the temperature is adjusted to 25 - 30 ° C, the temperature is appropriate to promote germination and root, and when the bud grows half a grain of grain and the root grows 1 grain of grain, it can be sown. Pay attention to the change of grain seed temperature at any time in germination to prevent the grain seed temperature from being too high or too low. If the temperature is too high, it will burn the seeds, and if it is too low, it will make sour wine and affect the germination rate.

6, refining buds: before sowing, the grain seeds of the good buds should be spread at room temperature for 3 - 6 hours after sowing. Make the grain seed adapt to the air temperature and improve the seedling rate.

7. Sowing methods: At present, water seedling and dry seedling are mainly used. For healthy, plump, germinating seeds can be both wet and dry breeding, for poor color fullness, germination potential weak, even infected seeds, it is best to use dry seedling. The seedlings cultivated in drought have the characteristics of short and strong seedlings, strong root vitality and strong cold resistance. After transplanting, they start quickly, tiller vigorously, improve the rate of ear formation and seed setting, not only can they be sown early and planted early, mature early, but also save seedling field, film, seed, labor, fertilizer input and water consumption.

8, prevent rotten seedlings: rotten seedlings are rotten seeds, rotten buds and dead seedlings of the general term. Take root now green as boundary, rotten seed rotten bud occurs before root now green. Dead seedlings occur after taking root and green, especially in the 2 nd and 3 rd leaf stages, and the control methods of rotten seedlings are as follows: First, spray sterilization, soil sterilization is mainly carried out by spraying 150 kg of thick mist of mixture of Dixong (1:500) and copper sulfate (1:1000) on the surface of the compartment; Second, timely water supply to control green dead seedlings; Third, the bud stage is washed by rain, the seed bud is exposed, and the mulch can be supplemented or the thin mud can be evenly sprinkled on the surface of the compartment, which can improve the emergence rate; Fourth, appropriate sparse sowing can be used to cultivate tiller strong seedlings.