When is the best time to plant soybeans?

Question 1: When will soybeans be planted? Usually in late May-early June. The time varies slightly from place to place.

Growth habit of soybean:

Soybean likes temperature, and its seeds begin to germinate at 10- 12℃.

The optimum temperature is 15-20℃ and the growth temperature is 20-25℃.

The optimum temperature for flowering and pod setting is 20-28℃.

Pod setting is delayed at low temperature, and it cannot bloom below 14℃.

If the temperature is too high, plants will end their growth early.

Seed germination needs more water,

The soil water content is required to be 70%-80% at flowering stage.

Otherwise, it will increase the bud drop rate.

The amount of fertilizer absorbed by soybean before flowering is less than 15% of the total.

The flowering and pod-setting period accounts for more than 80% of the total fertilizer absorption.

Question 2: When to plant soybeans is classified according to sowing date. Soybean in China can be divided into spring soybean type, Huanghuaihai summer soybean type, southern summer soybean type and autumn soybean type.

1. Spring soybean type

The northern spring soybean types were sown from April to May and matured in September, while the Huanghuaihai spring soybean types were sown from late April to early May and matured from late August to early September. The types of spring soybeans in the Yangtze River are sown from the end of March to the beginning of April and mature in July. The southern spring soybean type is sown from February to early March, which is more mature than mid-June. Spring soybean is short of sunshine and weak.

In May, there was sufficient precipitation and suitable temperature in most parts of Northeast China, which was very beneficial to soybean sowing and early sowing of soybean seedlings.

2. Types of summer soybean in Huanghuaihai

Wheat is sown in June after harvest and ripens from September to1early October. Short sunshine is moderate.

3. Types of Summer Soybean in South China

Generally, it is sown after wheat harvest or other winter sowing crops are harvested and protected in early May-June, and it will mature at the end of September to 10. Strong short sunshine.

4. Autumn soybean types

Sowing from the end of July to the beginning of August,1the first half of October 165438+ ripens. The short sunshine is extremely strong.

On April 24th this year, local officials in Heilongjiang, the largest soybean producing area in China, said that the soybean planting area in Heilongjiang may decrease this year, and the temperature in April was lower than that in the same period last year, which will delay the planting time by about 10 days to the beginning of May. It's May 5th, and soybean planting will begin one after another.

The main soybean producers in the world are Argentina, the United States, Brazil and so on. Soybean planting has also begun in all parts of the United States. According to the news of USDA on May 3rd, USDA announced in its weekly crop growth report on Monday (May 3rd) that as of the week of May 2nd, the soybean planting rate in the United States was 15%, compared with 5% in the same period of 2009, with a five-year average of 8%.

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Question 3: When can I plant soybeans? Generally, fine varieties are selected before and after Tomb-Sweeping Day and before sowing, and treated with ammonium molybdate and new high-fat film (which can effectively isolate virus infection, not affect the function of germination and expansion, strengthen respiratory intensity and improve seed germination rate). Sow in time as required.

Question 4: When is the best time to sow southern soybeans? 5 points

Question 5: High-yield soybean planting techniques and how to plant soybeans well;

Deep fertilization

Fertilization method: Under normal circumstances, fertilizer seeds are applied separately at 4-5 cm below the seed side, and the amount of fertilizer can be adjusted. When more than 20 kg of diammonium phosphate is applied every 667 square meters, it can be applied in layers: the upper layer of seed fertilizer is 5-7 cm deep, and the fertilization amount accounts for1/3; The depth of base fertilizer 10- 16 cm, and the amount of fertilizer applied accounted for 2/3. Or after the previous crop is harvested, spread the fermented organic fertilizer evenly on the ground, then rake the fertilizer into the soil with a rake, fully mix the manure with the soil, and then dig it deeply, and the raked bottle is finely ridged, or plant soybeans flat.

Fine sowing

Reasonable rotation: it is best to choose the right stubble, not heavy, and plant it in advance.

Careful soil preparation: ploughing in summer and autumn according to the previous crop, with a depth of 22-25 cm. When operating, there will be no big clods, no exposed strips or blocks, and the keys are important, not heavy and not leaking.

Soil moisture: After soil preparation, the soil moisture (calculated by dry soil weight) should be about 22% when sowing to ensure the normal water absorption and germination of seeds.

Sowing in time: Sowing soybeans in summer can be done after wheat is harvested as long as the water content is suitable. The best sowing date is June 10 ~ 25, and no later than early July.

Tiantuan management

Mowing and intertillage:

(1) hoes are everywhere in front of the first compound leaf, so that the hoes will not hurt the seedlings or loosen the soil.

(2) When the seedling height is about 10 cm, the second intertillage should be carried out to avoid damaging the seedlings, pressing the seedlings and leaking grass.

(3) After the second intertillage 10 days, the third intertillage should be carried out and more soil should be sown.

Weeding before seedling: The most commonly used broad-spectrum herbicides in production are propafenone and clomazone, which are effective against many gramineous and broad-leaved weeds in soybean fields. Dosage: 5% Puster aqua, the dosage is per hectare 1.5-2 kg; 48% clomazone EC, 2-2.5 kg per hectare. Pust, tribenuron-methyl and clomazone can remain in the soil for a long time, so special attention should be paid to the phytotoxicity of the following crops.

Weeding after seedling:

⑴ Herbicide suitable for early emergence: Pusute is the most widely used herbicide in production at present. When weeds are first unearthed, they are generally not later than the second compound leaf stage of soybeans. The dosage of common application before emergence is: 5% common application solution per hectare 1- 1.5 kg, which should not exceed 1.5 kg. Choose the weather with high humidity before and after rainfall, and avoid high temperature and dry noon and windy weather.

(2) The dosage of emulsion is 12%, and the dosage per hectare is 1- 1.5 kg; Concentrate 1.5%, and the dosage per hectare is 0.75-1kg; 5% Jingcaoke EC and 24% Kekuole EC, the dosage per hectare is 0.33-0.75 kg.

⑶ Herbicides suitable for the late stage of seedling emergence are generally applied at the compound leaf stage of 2-3 pieces of soybean. When the soil moisture is good in spring, pesticides can be applied earlier, and the lower limit is generally used. In spring drought, the application can be delayed appropriately, and the dosage is generally the upper limit.

Question 6: When is the best time for soybean fertilization? Soybean is a branched, multi-node, multi-flowered and nitrogen-fixing crop, and its nutritional feature is that it likes phosphorus. Nodules on the root system can fix a large amount of nitrogen in the air by themselves, but a small amount of nitrogen needs to be supplemented before the nodules develop vigorously. Delaying the reaction to potassium and implementing effective potassium supply measures can obviously increase the yield, which should be paid enough attention to by farmers.

Soybean fertilization, focusing on phosphorus, nitrogen and potassium as appropriate. Generally, 30-40 kg of phosphate fertilizer, 58 kg of urea or 15-20 kg of diammonium are applied to an acre of ground. Soybean seed dressing with ammonium molybdate, spraying boric acid or borax at full flowering stage and spraying spring rain 1 (sodium nitrophenolate) all have significant yield-increasing effects.

According to the experiment of Heilongjiang Agricultural Reclamation University, spraying Chunyu 1 twice (seedling stage and initial flowering stage) increased the yield of soybean by 18.6%, applying Chunyu 1 5 g at the bottom of mu and adding diammonium phosphate 15kg increased the yield of soybean by 23.6%.

Question 7: When will autumn soybeans be planted? Hello, after Labor Day, the temperature will be above zero and above 20 degrees. I wish you a bumper harvest this year.

Question 8: When should vegetable soybeans be planted? 1. Select seeds.

Soybean sprouts are a nutritious and delicious vegetable, and a good source of protein and vitamins. According to the analysis, every 100g of soybean sprouts contains protein1.5g, fat 2g, sugar 7. 1g, crude fiber 1g, calcium 68mg, phosphorus 102mg and iron.

Bean sprouts contain nitrophosphatase, which can supplement the enzyme lacking in the brain of epileptic patients, so bean sprouts have the effect of relieving epilepsy. Chlorophyll newly produced in bean sprouts can prevent cancer such as rectal cancer. Bean sprouts are rich in vitamin E, which is also good for cancer prevention. Bean sprouts have the effects of clearing away heat and improving eyesight, invigorating qi and nourishing blood, preventing gingival bleeding, cardiovascular sclerosis and low cholesterol. Vitamin E contained in bean sprouts can protect skin and capillaries, prevent arteriosclerosis and prevent hypertension in the elderly. In addition, because soybean sprouts contain vitamin C, it is a beauty food. Eating soybean sprouts regularly can nourish hair, keep hair black and bright, and have a good effect on facial freckles.

Generally, in order to increase the yield or prolong the fresh-keeping time, various hormones will be added to the bean sprouts purchased outside, including: auxin, rootless element, thickener, whitening agent, preservative, Su Changling, bactericide, fresh-keeping powder, water-soluble AB powder, water-insoluble AB powder and other N varieties.

Bean sprouts sold outside are generally rough and white, with extremely high moisture content. The real home-brewed bean sprouts are relatively low in water content, slightly yellow and more tasty.

If you produce bean sprouts at home, you don't have to worry so much, and you don't need to add any hormones. Generally, soybean sprouts can be produced in barrels or slightly larger containers, but you must punch holes in the lower part of the container. Soybean sprouts need to be produced in a dark room and watered three or four times a day, so they are not suitable for being placed on the balcony. They can be put in the bathroom or other storage room.

Select seeds

There are many varieties of soybeans, so you can choose them yourself. However, beans should be planted in the same year. Generally, you shouldn't buy it in the supermarket. They seem to be beautifully packaged, but they may be stored for a long time and have a low germination rate. Store coffee beans in a dry and low temperature place.

3. Please select

After the beans are ready, they need simple cleaning. Dry, moldy seeds and impurities can be removed by hand or tweezers, or by water.

impregnate seed

After selection, wash with clear water several times to increase the air permeability of the seeds. Pour the washed beans into a bucket or basin to soak the seeds. Bean sprouts are usually produced in large wooden barrels or plastic barrels. If there is a difference in the capacity of household buckets, the amount of beans planted in a bucket is generally 1-2 kg, so be careful not to use too much, because the production capacity of bean sprouts is generally about 6 times.

The soaking time depends on the temperature season, generally 6- 12 hours, about 6 hours in summer, 8- 12 hours in spring and autumn, and 15-20 hours in winter. You can change the water once on the way.

The principle of soaking beans is that beans are basically swollen, and the skin of beans has no or few folds. Soaking for too long will lead to slow growth and low resistance; Short soaking time and insufficient water absorption affect the later growth.

After soaking the beans, filter and rinse the mucus on the surface of the beans with clear water to make the beans dry and breathable.

sow seeds

To produce soybean sprouts, it is necessary to prepare a barrel container with a water leakage hole at the bottom, a filter membrane (mesh plastic cloth is enough) above the water leakage hole, and a black woven bag or cloth bag to cover it. Before sowing, it is necessary to clean the bucket and pad the bottom with bricks or other things. The barrel can be against the wall, and one side of the water leakage hole is at the lowest end, so that water can flow out fully when poured in, and there will be no accumulated water to soak beans.

Put the bucket in place, put a filter membrane on the bottom of the bucket, pour the bean seeds into the bucket, cover it with a black woven bag or cloth bag, then fill the bucket with water until the water just submerges the top layer of the bean seeds, then let the water flow out naturally and place it.

6. Water and light management

In order to produce soybean sprouts, it is necessary to reduce the light as much as possible in the dark. The minimum temperature of bean sprouts is 10℃, the optimum temperature is 2 1 ~ 27℃, and the maximum temperature is 28 ~ 30℃, which should not exceed 32℃. In the process of bud cultivation, water is used to adjust the temperature. For example, if the temperature is too high in summer, you should pour the bean sprouts with cold water, but pay attention to pouring them through the center of the cultivation container.

It needs to be irrigated about 3 times a day, and the number of irrigation depends on the seasonal temperature. If the temperature is high, it is necessary to increase the number of times of irrigation so that the beans can be flooded every time. You can also use shower, and the standard of shower is drenching.

......& gt& gt

Question 9: How to grow soybeans in flowerpots, right? Do you want them to grow and bear fruit until the harvest?

First of all, the soil should be fine, not too much water, and it is better to knead it into a ball. It's better to drill some holes under the basin.

A small amount of chemical fertilizer or farmyard manure should be used. Sow with 7 cm fertilizer and water less. More water is needed before seeds germinate. Cover the seeds with 3 cm thick soil. The temperature should be right. When the outdoor temperature is not lower than 10℃ at night, it can be placed outdoors. Often loosen the soil and water it after teething. I don't know how big your pot is. The seeds are 5cm apart. Everything's fine.

The relationship between seed varieties is also different in growth period, from 80 days to 140 days.

I wish you success.

Question 10: When is the latest time to plant soybeans, that is, soybeans? The northern spring soybean type is sown from April to May. Huang-Huai-Hai summer soybean varieties were sown in June after wheat harvest. The types of summer soybeans in southern China are generally from May to early June. Autumn soybean types are sown from the end of July to the beginning of August.