[Rice species germination] Points of rice seeds soaking germination technology point Points of rice seeds precautions precautions

[rice species germination] Points of rice seeds soaking germination technology point Points of rice seeds precautions precautions

The main points of rice seed soaking germination technology

rice seeds need to be exposed to planting for 2-3 days before soaking to improve the germination and germination rate of seeds.However, it is not advisable to grow on the cement floor and slate.When soaking, seed disinfection should be performed, and then soaking.rice seeds are soaked in water soaking. If you really need to be soaked in static water, you must be squeezed or changed at least twice a day.Generally, early rice is soaked for more than 48 hours, and medium and late rice must be soaked for more than 36 hours.

After soaking, the buds are mainly grasped, mainly at high temperature (35 C -38 C) breaking the chest, the temperature (25 C -30 C) long buds, low temperature (normal temperature) dry buds to practice buds.The temperature and water of the valley species are adjusted in the method of leaching temperature and covered with closed coverage, and the temperature and humidity are uniform in the inside and outside of the valley piles in the piles, which makes the buds and roots be consistent.The criteria for germination are half a grain of buds and a grain of root.

1,Expose

Select the seeds one week before the routine rice seeds soaking6 to 8 hours, then put the sun -exposed seeds in a dry and cool place to cool the heart to promote the breathing effect and enzyme activity of the seeds, which is conducive to improving the seed germination rate and germination potential;Bacteries attached to the rice shell.However, do not expose the hybrid rice seeds before soaking. After the exposure is seeding, the germination rate is generally reduced by 5%to 10%. The negative impact on the seeds with weak living power is greater.

2,Seeding

Select the seeds with water, remove the floating on the surface, and choose a full rice seeds to cultivate neat and strong seedlings.

3,Promote living water soaking

It is not easy for the planting time, it is best to useThe method of "daily immersion and night dew" is to soak the seeds during the day and remove it at night. It is best to put the seeds in the flowing water for 6 hours when soaking (if there is no flowing water for about 4-6 hours, it will be changed once every 4-6 hours).To eliminate the direct soaking of the old (old) for 48 hours.

Adopting intermittent soaking methods: the best time for conventional early rice soaking33-35 hours, more than 48 hours are not conducive to seed buds and germination rates.(The specific soaking time depends on the temperature and water temperature, and the seeds are used to suck water.seeds have suck water).Miscellaneous early rice should be used to decline, intermittently immersion method, and avoid continuous soaking for a long time.The process of rice soaking in rice is the water absorption process of the seeds. After the seed absorption, the activity of the seed enzymes begins to rise. Under the action of enzyme activity, the embryo starch is gradually dissolved into sugar, releasing the nutrients required for embryo roots, germ and embryo axis.When the rice seeds absorb water to the valley weighing 24%, the embryo begins to spare, saying that it is broken or dew.When the seed absorption reaches 40%, the seeds can germinate normally. At this time, the water absorption is the saturated water absorption of the seeds.When the amount of water absorption is reached, on the one hand, due to the water temperature of the soaking, the higher the temperature within a certain temperature range. The faster the seed absorption, the shorter the water absorption time.On the other hand, it is affected by rice varieties and combination types.Due to the strong activity of hybrid rice water absorption, the soaking time of hybrid rice seeds is shorter than the soaking time of conventional rice seeds.

4,Promote pharmaceutical soaking

It is recommended to use potion soaking, except for coating seeds.Water soakingAfter 6 hours, the bacterial spores attached to the seeds moved, and then the pharmaceutical sterilization was performed.At present, the commonly used potions are 25%fresher 2000-3000 times liquid (that is, 5 kg of 2ml of water, 4-5 kg of planting 4-5 kg) for 6 hours.Or use 500 times strong chlorine essence (2 grams of strong chlorine essence and 1 kg of water) for 6-8 hours, the disinfection solution should be higher than the surface of the seeds (do not change the water during disinfection), and then repeatedly rinse the rice seeds with water repeatedly.Rinse the residue solution.

5.Sprout

At present, many farmers like to put seeds in woven Bags to germinate, and even because the temperature cannot come, the seeds are exposed to the sun, which often causes burning buds.The best and easiest way is to use double -layer, disease -free, and moist sacks to germinate, put a layer of diseaseless straw on the ground, spread a sacks, spread the seeds evenly, and cover the other sack on it.Just pay attention to whether to add water.You can also put a sack or a relatively ventilated woven bag, and you can use straw to keep the insulation.After the valley species is heating, the control temperature is in35-38 C, the temperature should be piled up with too high temperature, and measures should be taken to improve the pile temperature.After about 20 hours, the grain can be exposed.The temperature is normal in mid -to -late May, and the daily immersion and night exposure method can be used to germinate normally without the need to add insulation materials.

6.Refining

Before sowing, spread out the germination of germination at room temperature to refine the budsSowing after 3 to 6 hours.Make valley species adapt to air temperature and improve the seedling rate.

7.Sow

After the grain species is dew, the temperature is adjusted toFrom 25 to 30 C, the temperature can be promoted to the roots. When the buds are half a grain of valley and 1 grain of the roots, the lower fields can be sown.

precautions for rice seed germination

1,Flip it every day when germination1-2 times, the temperature of the seeds is uniform, the temperature of the upper and lower, the temperature is uniform, and the germination is neat.

2,When germination, you must pay attention to temperature changes, prevent and control high temperature burning, exceed40 C seeds lose their germination.

3,seed85%broke the chest, reduced the temperature to 25 C, the buds and root length were controlled within 2 mm, and the plant was spread out.

4,After breaking the chest, proper water replenishment, pay attention to the ventilation and oxygen, you can urge the strong bud.

5.According to their respective production plans, the germination, sowing in a timely manner, and controlling the seedling age in3.5 Leaf age, prevent small seedlings in the early stage, and insert large seedlings in the later stage.