When is rice planted in the Tohoku region? Why is the climate in Northeast China suitable for growin

Breeding in April, planting in May, maturing in October!!

Hello, rice likes high temperature, humidity, short day, and does not have strict requirements for soil, but paddy soil is the best. The minimum temperature of seedling germination is 10 12, and the optimal temperature is 28 32. The average daily temperature of tillering stage is more than 20, and the appropriate temperature of panicle differentiation is about 30. Low temperature prolongs the differentiation of branches and spikelets.

Heading temperature 25 35. The optimal temperature for flowering is about 30, below 20 or above 40, and pollination is seriously affected.

The Northeast Plain is one of the only three black soil regions in the world, and it is located in the temperate and warm temperate ranges, with continental and monsoon climate characteristics. Summers are short, warm and rainy;

Winters are long, cold and snowless. The monsoon alternates between winter and summer. The average temperature in July was 21 26, and the average temperature in January was -24 -9.

10 The active accumulated temperature above 2200 3600 decreases from south to north. The annual precipitation is 350 700 mm, decreasing from southeast to northwest. Therefore, the Northeast Plain is very suitable for growing rice.

It is best to use farmhouse fertilizer for rice planting, and it is best to spread rice base fertilizer before plowing or before harrowing. Rational application of rice fertilization helps to achieve high and stable rice yield, however, now farmers do not have farm fertilizer, if there is no farm fertilizer, you can choose to apply compound fertilizer, the amount of fertilizer depends on soil fertility, roughly 60 to 80 kg per mu. In the later stage, topdressing can not only use urea, but also needs to be used with potassium dihydrogen phosphate.

In the middle temperate continental climate, the frost-free period is 140 days, the average annual precipitation is 608 mm, and the annual sunshine is 2629 hours. Rice is grown here, with abundant sunshine, irrigation by natural river water, and a long planting and maturity period.

Rice: Planted in the northern zone from March to April.

Rice, is an annual grass, about a meter tall, with long, flattened leaves, panicles composed of many spikelets. The fruit is rice, and after being hulled, it is called rice or rice. Rice can be divided into indica and japonica rice, early rice and middle and late rice, glutinous rice and non-waxy rice.

The rice grains produced by rice are called rice or rice after they are hulled. In addition to being edible, rice can also be used as industrial raw materials for brewing wine and sugar, and rice husks and rice stalks also have many uses. Rice belongs to the genus Poaceae and is an extremely old crop.

According to archaeological discoveries, rice has been cultivated in China for at least 7,000 years. There are two types of cultivated rice in the world, namely Asian cultivated rice and African cultivated rice. Among them, Asian cultivated rice has a large planting area and spreads all over the world, so it is called ordinary cultivated rice.

A large number of facts have proved that the south of our country is at least one of the centers of origin of ordinary cultivated rice. According to the origin, evolution and relevant ancient books of Chinese cultivated rice (belonging to Asian cultivated rice), Chinese cultivated rice can be divided into two subspecies, indica and japonica, and according to the temperature and light reaction of the variety, the water requirement and endosperm starch characteristics are divided into different types such as early and late, water, land, sticky (non-glutinous), glutinous and so on. Therefore, strictly speaking, it is not accurate to list indica, japonica and glutinous rice side by side in the classification, in fact, indica and japonica subspecies are divided into sticky and waxy, as follows:

Glutinous - long-grained glutinous (small glutinous) indica rice non-waxy - glazed rice glutinous - clump glutinous (large glutinous) japonica rice non-glutinous - japonica rice The traits of indica rice are relatively close to its ancestor wild rice, so some scholars believe that indica rice is not basic and japonica rice is not variant. Indica rice is suitable for cultivation in low-latitude, low-altitude humid and hot areas.

March-April, end of March, beginning of April.

Rice is planted at different times in different places, some are harvested once in one season, and some are harvested in two seasons. North China is single-cropping rice. The sowing time of a season of rice must be sown before Qingming, transplanting at the end of April and early May (if conditions permit, it can also be transplanted in the valley rain), and the sowing time of early-maturing single-season rice in the northeast is about April.

The growth period of the first cropping rice is 104 days, and the growth period of the second rice is 87 days. It is generally an early-maturing variety. Winters were avoided.

In the north, it is necessary to cultivate extra-early maturing varieties for the cultivation of double-cropping rice. The first crop of rice is raised from mid-April to early August, about 104 days. In the second season, rice is harvested and transplanted. The harvest was harvested before the ground froze;

In the south, taking the middle and lower reaches of the Yangtze River Plain as an example, the sowing time of early rice is sowing in mid-April, transplanting in early May, harvesting in late July, followed by late rice transplanting (called double grabbing), which generally must be finished before the beginning of autumn, and the late rice harvest in late October and November.

Rice planting can be divided into early, middle and late rice, and the planting time is roughly as follows: 1. Early rice is generally sown at the end of March and early April, and harvested in mid to late July; 2. Medium rice is generally sown from early April to the end of May, and harvested in mid to late September; 3. Late rice is generally sown in mid to late June and harvested in early to mid October; Enlarge.

In our northern region, seedlings are sown in late March and early April, and seedlings are planted around mid-May, and harvesting begins on October 1.

Rice is generally seeded after Qingming, and after half a month of seedling cultivation, the seedlings are transplanted to the paddy field, and the entire seedling period at this time is over.

Early rice is generally sown at the end of April and early April, medium rice is sown at the beginning of April and at the end of May, and late rice is generally sown in mid to late June.

Early rice is generally sown at the end of March and early April, and harvested in mid to late July.

Medium rice is generally sown from early April to the end of May, and harvested in mid to late September;

Late rice is generally sown in mid to late June and harvested in early to mid October. Enlarge.

The rice grown in the northeastern region is upland rice, and the demand for water is not very high.

Why do they say that rice in the Northeast is good?

1. Taste. Compared with southern rice, northern rice tastes softer and waxier, and is accompanied by a sweet taste, while northern rice is more viscous.

2. The southern rice is mostly indica rice, which is relatively loose when steamed, but it will taste crispier, so the southern rice is not as delicious as the northern rice.

In the final analysis, the reluctance of residents in North China to grow rice is still a problem of economic benefits, and because of the solid state of mind, it is also convenient to buy good rice directly, and if you grow it yourself, the income will be reduced by half, and due to the problem of land, the rice grown may not be delicious. Small-scale planting is not worth it, and large-scale planting has become a relatively big problem if it is not tasty, so farmers in North China are reluctant to grow rice.

Rice can be planted in March, April, and June.

The minimum temperature of rice 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.

Rice Seed Treatment:

2-3 days before sowing, dry the seeds, spread 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.

Seed selection Through seed selection, select seeds, broken grains, insect grains and grass seeds, and select 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.

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.

Germination Germination is uneven, and it 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.

China's rice planting has a long history, and it is planted in many regions of the country, but the sowing time of rice in different regions is not the same, so when will the rice be sown in Northeast China? 1. When to sow rice in Northeast ChinaThe rice planted in Northeast China is early-maturing single-season rice, which is generally sown in mid to early April every year.

1. When will the rice be sown in Northeast China?

The rice planted in Northeast China is early-maturing single-season rice, which is generally sown in mid to early April every year, and the specific sowing time depends on the local climate. The rice cultivation area of early-maturing single-cropping rice in Northeast China is located in the Liaodong Peninsula, north of the Great Wall and east of the Daxing'an Mountains.

That is to say, the early-maturing single-crop rice cultivation area in Northeast China includes all of Hei, Jiquan and most of Liaoning and northeast Inner Mongolia, a total of 184 counties (banners, cities), and there are two sub-regions in this area: the extra-early-maturing sub-area of the Ji Plain River Valley and the early-maturing sub-area of the Liaohe Coastal Plain, and the local rice area accounts for only 3% of the country.

Low temperature chilling injury is common in northern regions. The safe growth period of rice is about 100-120 days. During the growing period, there are 1000-1300 hours of sunshine and 300-600 mm of precipitation.

2. Rice planting technology in Northeast China.

1. Pre-treatment.

It is necessary to select high-yield, high-quality and disease-resistant varieties according to the local climate, such as Yanjing 47, Liaoxing No. 1, etc., and then dry the rice, and then soak it with seed spirit or fungus and insect clear for disinfection.

2. Sow seeds. Select the appropriate seedling land, sow according to the standard of 200g of wet seeds, use mechanical transplanting with plastic floppy disk or plastic hard disk to raise seedlings, each tray of sowing amount of 125g, after pressing the seeds and covering the soil, closed weeding.

Special attention should be paid to timely ventilation and cooling in case of high temperature weather to prevent high temperature seedlings from burning. According to the occurrence of pests and diseases at the seedling stage, suitable pesticides should be selected to prevent the introduction of pests and diseases into the field and reduce the incidence of pests and diseases in the field.

3. Rice transplanting. Before transplanting, the land is leveled, and then a compound fertilizer of 35% nitrogen, 100% phosphorus, and 50% potassium fertilizer is applied, and when the average daily temperature is stable at 15, rice can be transplanted and planted.

4. Fertilization and watering.

According to the growth of rice, reasonable fertilization and watering, the general number of fertilization is twice, one is after the seedlings are slowed, one is the booting stage, the fertilization ratio is urea 10 15kg 667m, phosphate fertilizer 15 20kg 667m, potassium fertilizer 4 5kg 667m, zinc sulfate.

5. Pest control.

When rice grows, it is also necessary to carry out pest control, we must find it in time, prescribe the right medicine, and choose high-efficiency, low-toxicity, and residue-free pesticides to ensure the healthy growth of rice seedlings and the bumper harvest and high yield of rice.