Does rice need to be soaked for germination or can it be soaked directly before planting?

Rice seeds need to be soaked and germinated before they can be sown. However, there are many details that we need to pay attention to in the process of rice soaking and germination, not just direct soaking.

Seeds cannot germinate without enough moisture, proper temperature, humidity, and sufficient air, and absorbing enough moisture is the first step for seeds to germinate. After the seeds are dried, they have a low moisture content and protoplasm.

It is gelatinous and has weak metabolic activity. Respiration of the embryo and endosperm.

It can only be enhanced by absorbing enough water to swell and soften the seed coat, dissolving oxygen in the water and penetrating the seed cells. As the moisture content increases, the protoplasm is made up of gelatin.

into a solution. Increases free water, increases metabolism. Under the action of a series of enzymes, the complex insoluble substances stored in the endosperm are converted into simple soluble substances for the growth of young organs.

Water also helps in the rapid transport of organic matter to the growing germ and radicle, which speeds up the germination process. Therefore, seed soaking control is an important part of promoting seed germination.

1. Water immersion requirements, rice seed germination first needs to absorb enough water. When the water absorption of rice seeds reaches 25% of their own weight, germination begins, but slowly and irregularly; When the water absorption rate reaches 40% of its own weight, it is saturated and absorbs, which is most suitable for germination.

2. The water absorption rate of rice seeds is related to water temperature. When the water temperature is 10°C, the absorption time is greater than 90 hours; At 30 °C, it only takes 40 hours. The minimum temperature at which rice germinates is 10, but germination is very slow at this temperature.

Over time, bacteria can invade and cause seeds and buds to rot. The optimal temperature for rice seed germination is 20-25 ° C. At this temperature, rice seed germination is normal and healthy.

The fastest germination temperature of rice seeds was 30 35, and the germination speed was the fastest, but the germination was weak. The maximum temperature for rice seed germination is 40°C. Above this temperature, the growth of roots and shoots is inhibited.

Over time, the roots and shoots burn. Therefore, the temperature of 30 35 °C should be maintained at the beginning of seed germination in order to quickly break the shell, and cool down to 20 25 °C after the shell is broken to promote the neatness of the root buds.

3. Rice seeds require air immersion, and rice seeds can also germinate in the anaerobic water layer, but this germination is abnormal. Shoots grow fast and roots grow slowly. This is because rice seeds have to breathe oxygen to get enough energy to germinate.

Rice seeds take root and germinate under aerobic conditions, and germinate under the anoxic aqueous layer, which is one of the important reasons for the rot of rice seedlings. The above is about the relevant content of rice soaking and germination. We only need to grasp the precautions when soaking and germinating rice, and scientifically and reasonably carry out rice soaking and germination.

It needs to be soaked to promote germination, so that the rice can have a better growth, and the germination rate is relatively high.

I think that rice needs to be germinated before planting, because this can make the rice grow better.

I think that rice needs to be soaked and germinated before planting, because it helps the rice to grow.

I think it is necessary to soak the seeds and promote germination, because this will make the rice grow better.

1. Soaking temperature requirements

The minimum temperature of rice germination is 10, but germination at this temperature is very slow, and after a long time, the germs invade, which will cause rotten seeds and rotten buds. The most suitable temperature for germination of rice seeds is 20 25, and germination at this temperature is relatively neat and robust. The fastest germination temperature of rice seeds is 30 35, and the fastest germination is at this temperature, but the buds are weak.

The maximum germination temperature of rice seeds is 40, and above this temperature, the growth of root buds will be inhibited, and after a long time, the root buds will be burned out. Therefore, when the rice is artificially heated and germinated before sowing, the temperature is required to be kept at 30 35 in the early stage of germination, so that the shell can be quickly broken. After the shell is broken, it is cooled to 20 25 to promote the neatness of the roots and buds.

2. Water requirements for soaking

For rice seed germination, it first needs to absorb enough water. When the water absorption of rice seeds reaches 25% of its own weight, germination begins, but slowly and unevenly; When it absorbs 40% of its own weight, it reaches saturated water absorption, which is the most suitable for germination. The speed of water absorption of rice seeds is related to the water temperature, and it takes more than 90 hours to absorb water at a water temperature of 10. At 30 hours, it only takes 40 hours to fill up.

3. Immersion air requirements

Rice seeds can also germinate under the oxygen-free water layer, but this germination is abnormal, often the buds grow fast and the roots grow very slowly, the so-called "dry long roots, wet long buds". This is because rice seeds must be respirated by oxygen to obtain enough energy to germinate. Under aerobic conditions, rice seeds first grow roots and then sprouts; When germinating under the oxygen-deficient water layer, there are often buds without roots, which is one of the important reasons for seedling rot.

In addition, before soaking seeds, choose sunny days, generally 1-2 sun, high temperature weather can not directly spread the seeds on the cement site to dry seeds, to prevent the temperature is too high to burn the embryo, affect the germination ability. When drying seeds, it is necessary to pay attention to thin spreads and frequent turning, so that the seeds are heated evenly, and the operation should be careful to prevent seed damage and mixed varieties. The seeds can be dried by drying seeds, improving permeability and conducive to water absorption; Drying seeds has the effect of promoting the transformation of substances and accelerating the ripening of seeds. It can enhance the activity of enzymes in seeds and improve the vitality of seeds; Drying seeds also has the effect of killing germs, improving the germination potential and germination rate of seeds, and making germination neat and consistent.

Generally, it is about 30 degrees, and then the maximum temperature cannot exceed 32 degrees, otherwise it will destroy the nutritional value of the seeds, and it will also affect the normal germination.

The most suitable temperature for rice soaking and germination is about 30 degrees, and you should choose some warm water to soak overnight.

In general, it is suitable for 13 degrees to 15 degrees. will get a particularly good germination. Let this seed develop better and better.

The most suitable temperature should be 13 to 15 degrees and not more than 32 degrees. You can get a very good planting result.

About 25 degrees is fine, and this temperature is the most suitable, so that the rice seeds can germinate faster.

It is also possible to sow directly without germination after rice soaking, but it is best to decide according to the temperature, and it is best to promote germination, because the temperature in the northeast is low, and the seedlings will emerge after germination! I don't recommend it to rice growers. This method is not promoted in our Heilongjiang reclamation area, and the biggest advantage is that it avoids the risk of germination, fever and high temperature; The biggest disadvantage is that the emergence of seedlings is slow, it is very prone to drought, and it is more difficult to manage.

There are two kinds of rice seeding, water seeding and drought seeding, water seeding farmland with water leveling, seeding without germination, but the seedling emergence time is not the same, drought seeding is selected according to the soil moisture, and it is best not to germinate if the moisture is not good.

Rice sowing days seedlings, early rice sowing temperature is low, seedlings generally about 5 days, late rice temperature is high need about 3 days, seedlings should be mainly open field before emergence, dry long roots, wet long seedlings, aerobic long roots, anaerobic long seedlings, to create a favorable growth space for seedlings. If the rice seedlings are raised in plastic greenhouses, if the temperature in the shed is about 25 28 °, 5 7 can emerge. If the rice seeds are seeded in the open air, it takes about 10-13 days to emerge.

The temperature of the rice planted in the open broadcast is unstable in the paddy field, so how many days does it take for the rice to be planted from sowing to transplanting? Not necessarily. The climate in different regions is different, and the growth rate of seedlings during the greenhouse seedling raising period is also different, generally in 7-10 days.

The rice cultivation in Liaoning is mainly based on "dry breeding and sparse planting, which is suitable for machine cutting."

The speed of seedling emergence is related to temperature, and the most suitable temperature for germination of rice seeds is 20-25. The fastest germination temperature is 30-35, but the buds are weak. The maximum temperature of germination is 40, and if the temperature is too high, it will inhibit the growth of root buds. According to the determination of relevant departments: under the condition of constant temperature, the speed of seedling emergence is related to temperature, and the most suitable temperature for rice germination is 20-25; The fastest germination temperature is 30-35, but the buds sent out are weak. The maximum temperature of germination is 40, and if the temperature is too high, it will inhibit the growth of root buds.

After the germination of rice seeds, according to the preparation of the seedlings, they can be dried for one to two days, and the temperature can be sown when the temperature drops to the same as the natural temperature after germination.

It takes about 12 days, and some small seedlings can grow at this time, and the sowing effect is very good at this time.

Rice is a delicious food that can be sown after about an hour or two, and after the rice is processed, it becomes rice.

The rice is ready for sowing 3 to 5 days after soaking. At this time, soil management is carried out, watering multiple times, and applying more household fertilizer, so that the rice will grow very well.

It takes about 30 to 40 hours to sow seeds, and at this time rice seeds are particularly easy to germinate.

Rice is also very nutritious, but it is best to dry it for 2 to 3 days before soaking seeds and promoting germinationThe drying time is also closely related to the weather, it is best to choose to dry it on a sunny day, but it should be noted that it is important not to spread the rice seeds on the cement floor or on the board, which is likely to damage the germ of the seed, which will have a certain impact on our planting, I hope everyone can realize this, at the same time, we need to pay attention to the fact that before planting rice, we must learn to distinguish the quality of the seed.

1. How to select seeds.

Generally speaking, the best way to use brine to select seeds is 1:13, after removing the sinking seeds, wash the brine on the surface of the seed coat with clean water, so as to ensure that the seeds are healthy, I hope everyone can realize this, and we need to pay attention to the fact that for some unhealthy seeds, if planted in the ground, it is likely to cause a reduction in yield.

2. How to germinate rice.

We all know that it is necessary to germinate before planting, generally speaking, the soaked seeds need to be fished out and germinated with a mesh bag, and the temperature must be controlled well, preferably at 30 32 degrees, so that the rice can better form buds. At the same time, we need to pay attention to the fact that after germination, it is best to put the rice seeds in a cool place to dry the buds, so as to better protect the activity of the seeds.

3. How to cultivate rice.

Before planting rice, we must first prepare the land, after the completion of the land will be transplanted, we all know that the current means of transplanting are also very much, there are many transplanting machines to choose from, after transplanting should be fertilized, after drainage and irrigation waiting for the formation of young spikes. At the same time, we need to pay attention to the fact that we must take good care of pests and diseases in our lives, and I hope everyone can pay attention to this matter.

It generally takes 1-2 days for rice seeds to soak and germinate. Before soaking rice seeds, it is necessary to choose sunny days to dry seeds for 2-3 days to improve the germination potential and germination rate of seeds. However, do not spread the rice seeds on the cement floor or stone slab to prevent sunburn to the seeds.

The drying time is also closely related to the weather, generally 2 to 3 days, choose a sunny day for drying.

Just dry the seeds, generally for one to two days.

I think it needs to be soaked for about 2 to 3 days, so that the rice can grow better.

I think it will take about three hours, so we must pay attention to this aspect.

It needs to be soaked for about two days to allow the rice to soak sufficiently.

Rice seed germination, generally soaked for 20 hours, that is, a day and a night, the lowest temperature of rice germination is 10, the highest temperature is 40--42, the most suitable temperature is 28--32, and the seeds germinate the fastest and most uniform under 32 conditions. Rice Seed Treatment:

1. Drying seeds 2-3 days before sowing, dry the seeds, pave them to a thickness of 3 5 cm, and turn them several times a day to ensure that the seeds are evenly dried. When the sun is strong and the temperature is high, it is necessary to increase the number of turning of the seeds, and avoid not turning the seeds for a long time, so that the seeds will be burned at high temperature and reduce the germination rate.

2. Seed selection Through seed selection, pick out seeds, broken grains, insect grains and grass seeds, and select seeds with large and mature seeds. There are salt water selection, yellow mud water selection and other methods. Brine selection is to put water in a tank or large basin and put salt into the water.

Stir well while putting salt, take an egg and put it in the prepared brine, when the egg is exactly half in the water and half on the water, the concentration is just right, it's okay, don't put any more salt.

3. Soak and disinfect the selected seeds with 100 grams and other soaking agents. If you don't make 100 grams, you can also use others. When buying medicine, ask the seller which one is better, and you can also ask more about what kind of medicine is used by the people around you.

Seed disinfection is to prevent rice seedlings from getting bad seedling disease, seedling blast, and blight.

4. Germination The germination is uneven, which is related to temperature. The minimum temperature of germination is 10, the maximum temperature is 40--42, the most suitable temperature is 28--32, and the seed germination is the fastest and most uniform under 32 conditions. Therefore, after the seeds are soaked, they are passed with 47-48 water, and then germinated at a constant temperature of 32.

The buds should not be too long, and the buds should be 1 cm long to achieve whiteness, and the overall neatness is the best, otherwise the buds are easy to get bad seedling disease.

Seedling fertilization rice is easy to lack fertilizer after 2 and a half leaves, seedlings lack fertilizer leaves will generally be yellow and not so green, then pay attention to fertilization once, you can use Yanwo potassium dihydrogen phosphate + Yanwo zinc fertilizer, the effect is better.