What are the causes of peanuts growing in greenhouses?

I think maybe the sun is not enough, and there is very little water, maybe the fertilizer situation is not very good, so the peanut seedlings are relatively small, we should pay more attention, and we should read more books, find their problems, and then go to solve them.

It may be that the quality of the seeds themselves is poor, the soil aeration conditions are not good, and the oxygen supply is insufficient when the peanut seeds germinate.

1) Climatic factors.

Low temperature and high humidity is the main factor affecting peanut seedling, when the temperature is lower than 12 for seven consecutive days, peanut is not easy to emerge, so peanuts should not be planted below 12, because when the temperature is lower than 12, and the soil moisture is large, it is easy to cause.

The phenomenon of powdered seeds seriously affects the emergence of peanuts.

2) Seeding depth.

The sowing depth of peanuts is easy to be 3 cm to 5 cm, and too deep will affect the emergence of seedlings.

3) Premature shelling.

Premature shelling is easy to dry peanut grains, easy to peel after absorbing water, affecting the emergence of seedlings, so the most suitable time for peanut shelling is 7 days and 10 days before sowing.

Aphids, leafhoppers, thrips, these are common pests and diseases of peanuts, which have a great impact on peanuts.

Rust, leaf spot, root rot, stem rot, and some yellow leaf diseases, mottled diseases, in short, can affect the overall yield of peanuts.

1. Peanut brown spot disease, crop rotation stubble: the host of peanut leaf spot disease is relatively single, only infects peanuts, and rotates with other crops, so that the pathogen can not get a suitable host, which can reduce the damage and effectively control the occurrence of the disease. The crop rotation cycle is more than 2 years.

Prevention and control methods: After the peanut is harvested, the diseased leaves in the field should be removed in time, and when the manure made of diseased plants is used, it should be fully decomposed before being used to reduce the source of disease. 2. Peanut virus disease, peanut virus disease, in addition to bud blight, which is mainly transmitted by thrips, other diseases such as light mottle disease, yellow mosaic disease, and common mosaic disease are transmitted through seeds and aphids, and the main primary infection source of these diseases is the disease-borne potato.

Control methods: use non-toxic or low-toxicity seeds to eliminate or reduce the source of primary infection. Non-toxic seeds can be obtained by isolating and propagating them.

After peanuts emerge and before flowering, aphids, leaf mites and other stinging and sucking mouthparts pests. The underground pests of peanuts mainly include grubs, mole crickets, needleworms, ground tigers, etc. Underground pests are the main pests that affect peanut germination, fruit set, pod setting, yield and quality.

Peanuts grow seedlings above ground and bear fruit underground, which requires fertile soil and loose sandy loam soil: after the seeds enter the soil, it is conducive to taking root and germinating; The flowering and needle stage is conducive to the easy puncture of the flower needle; The fruiting period is not only conducive to fruit expansion, but also conducive to the absorption of nutrients outside the soil field management: irrigation, peanuts are more drought-tolerant crops, irrigation depends on the seedling conditions, to ensure the normal growth of peanuts at all stages, in case of drought after flowering, irrigation should be timely irrigated.

According to the <> production, the yield of flowers per mu in one season is about 400 kilograms, and the high yield can reach more than 500 kilograms, and the yield of flowers in two seasons is generally 800 kilograms per mu, and the high yield is more than 1,000 kilograms, and the output value per mu reaches more than 5,000 yuan, and the net income per mu is about 2,500 yuan. , skillfully control seedlings. 40-50 days after the first flowering of peanuts, that is, the early stage of peanut poding, when the plant grows to 30 cm, it should be sprayed with 70-100 mg of ppm water solution in time, and 50-75 liters of liquid can be used per mu.

It can dwarf peanut plants and prevent lodging. For planting peanuts, it is necessary to choose high-yield seeds, and the grains are full, although many peanuts grow large, but the particles are small and not full, so that the natural will not achieve high yield. 1. Step on the seedling cover needle, a large number of flower needles will be formed during the flowering period of peanuts, the more the number of flower needles, the greater the fruit in the later stage, you can use the seedling method to improve the fruit rate of the flower needles, so that each hole has more fruits.

2. Pruning can promote new side branches, more branches, and more fruits. Topping,.

There are seven main points for planting peanuts to achieve high yield: first, it is necessary to carry out deep ploughing and land preparation; the second is ridge planting, which is generally carried out half a month before local sowing; the third is to apply plantar fertilizer; the fourth is the grading of sun-dried seeds; fifth, timely sowing and reasonable dense planting; Sixth, it is necessary to check the seedlings and replant and clear the soil; Seventh, do a good job in fertilizer and water management. After sowing after drying, the method of hole sowing is generally adopted, according to the plant row spacing of 20 40 cm to open the hole, 3-4 seeds per hole, and cover with a thin layer of soil after sowing.

Seedlings and seedlings: When the seedlings grow neatly, start to replenish the seedlings.

Seed preparation.

Choose peanut varieties that are suitable for the region according to local conditions, and choose plump double kernel fruits. Seeding: Drying seeds before sowing to increase the maturity of seeds and break dormancy, and at the same time facilitate the transformation of nutrients in seeds, improve seed vitality, promote seed germination, and can also play a role in sterilization.

Soak seeds to promote germination. An important part of preserving seedlings. Germination can solve the problems of early sowing and low temperature seed rot. The seeds are soaked in warm water at 40 °C for 3 4 hours, covered with plastic film, and germinated at a temperature of 25 30 for 24 hours ready for sowing.

Seeding method. Peanuts should be sown as early as possible during the sowing period, the earlier the sowing date, the longer the growth period, and the fuller the grains, so it is necessary to rush to sow in time, which is one of the key factors determining the yield of peanuts. However, at the same time, the determination of the sowing date should ensure that all seedlings are sown at one time. In addition, the growth and development period of peanut should be in a suitable growth period, which is conducive to regulating the relationship between vegetative growth and reproductive growth of peanut.

It is necessary to plant reasonably and densely, which is also a key technical measure for high yield of peanuts, and adopt the cultivation method of wide rows and narrow plants. Generally, the suitable sowing depth of peanuts is 5 cm, and the deepest sowing depth of peanuts cultivated in the open field cannot exceed 7 cm, and the shallowest cannot be shallower than 3 cm. After sowing, the suppression can preserve moisture, and at the same time, the seeds can be in close contact with the soil, so as to achieve the rise of moisture in the middle and lower layers of the soil, and create a moist environment for the seeds.

Be sure to choose the right soil, pay attention to prevent all pests and diseases, and fertilize and water regularly, cultivate the peanut seedlings first, and then plant them separately. The sun is shining, the land is fertile, watering is done regularly, pruning is carried out, and weeds around peanuts are also watched, etc.

If you want high yield of peanuts, you must ensure the nutrients and moisture in the ground, and apply chemical fertilizers and watering from time to time.

Peanuts should be planted on sunny and fertile land, and the planting to promote high yield of peanuts is 1, the row spacing should be controlled, 2, nitrogen and potassium fertilizer should be applied 3, flood control and waterproofing.

Especially when the weather suddenly turns cold and hot, you must pay attention to peanuts this spring. Remind everyone that there is a good chance of encountering the cold of late spring. In particular, high-quality, safe insecticides and fungicides should be used for seed coatings, protective fungicidal seed coatings should be used, and azole fungicides should not be used as much as possible.

In the event of spring cold, the fungicidal seed coating has the effect of protecting the seeds, the seedlings are fast, the seedlings are good, and the rot is prevented. Seeds are of poor quality, stored incorrectly, or have been stored for too long.

Geothermal lowland, soil viscosity, texture differences, high soil moisture content, long seed appearance time, and poor cessation all affect the water absorption of seeds, and the seedlings become weaker. The seeds are not neat and uneven in size. The application of organic manure that is not fully mature or the fertilizer concentration is too high, resulting in fertilizer loss.

Sowing is not fine or shallow, making the buds uneven or no bud furrows. For many years of continuous cropping, no stubble, serious seedling diseases (root rot, stem base disease), lack of seedling ends.

Low temperature time is long, germination, germination, decay after sowing the average daily temperature is less than 13 for more than 3 days, with the rainy season soil moisture excessive, decay will occur. The average daily temperature is below 10 for more than 5 days, and the rainy season and the soil are moist, which can cause serious seed rot. The average daily temperature is 13 for more than 5 days, with no precipitation or at least some decay in precipitation.

It is best to listen to the weather forecast before planting. Can the low temperature, rainfall, and ground temperature of 5 cm deep soil stabilize at 15 in the next 5 days?

The most suitable temperature for peanuts is 23 degrees Celsius for early maturing peanuts and 26 to 30 degrees Celsius for medium and late maturing peanuts. The higher the temperature, the faster peanuts appear. For example, the average daily temperature of most varieties is between 14 degrees Celsius and about 20 days for germination, and the average daily temperature increases by 1 degree Celsius, and the appearance time is shortened by about a day.

The temperature is too low, and the three are dangerous. In most areas, it is recommended to have some light rain in the past two days after spring sowing (after spring sowing, and many farmers want to plant peanuts, which is absolutely not possible!). Peanuts are a rarefied crop, so when the temperature is below 13, the seeds will not germinate.

The north (Guyu 3354 into the river) is the best time for sowing.

After the rainfall, the temperature rises to about 20, but the surface is damp, the water evaporates and absorbs heat, the ground temperature is relatively low, the peanuts do not germinate, and the temperature is low, so it is useless to plant half a month in advance. Before the weather change before the rain, the temperature is suddenly high and low, and when it encounters low temperature and high humidity, it is easy to have moldy and rotten seeds, so the emergence rate of peanuts is low, so early sowing will not increase the yield, but reduce the production.

Peanut sowing in the low temperature soil for a long time, in April there is often a spring cold occurrence, rain increases, after cooling, peanut kernel in the soil for a longer time, seedling emergence slowdown, then the probability of rotten seeds will increase, thereby affecting the seedling emergence rate, can not achieve the purpose of increasing yield.

The temperature is too low and easy to rot seeds, unable to emerge, resulting in a reduction in peanut yield, should be improved in this way, the appropriate temperature of the soil is 10cm at least 15 when sowing is the best. The south should be sown early, the north should be sown late, and the southern Lunan area is the most suitable around May 1 of the Gregorian calendar.

In low-temperature soils, with the excessive soil moisture in the rainy season, seed mold and rot are prone to occur, and the longer the seed decay will be, the more serious the seed rot will be, so the peanut emergence rate will be reduced.

When the average temperature on the sowing day is lower than 13, more than 3 consecutive days, accompanied by rain, and excessive soil moisture, seed rot will occur;

If the average daily temperature is lower than 10, more than 5 consecutive days, accompanied by rain, the soil is too wet, it will cause serious seed rot;

Peanuts have certain requirements for climatic factors such as temperature, moisture, and light.

1) Temperature. The suitable temperature for peanut growth was 25 30, which was lower than the basic stop growth, and higher than 35 had an inhibitory effect on peanut growth. The temperature difference between day and night is more than 10, which is not conducive to pod development, day 26 and night 22 are the most suitable for pod development, and day 30 and night 26 are the most suitable for vegetative growth. 5 If the temperature is low for 5 consecutive days, the root system will be injured, and the aboveground part will be frost damaged. The accumulated temperature of the whole growth period is 3000 3500, about 3000 for the pearl bean type, and about 3500 for the ordinary type and the dragon type.

2) Moisture. Peanut is relatively drought tolerant, but the soil is moist when germinating and emergeting, and the maximum water holding capacity in the field is 70%, and it shows strong drought resistance after emergence. If the water content in the soil layer 20 cm deep drops below 10%, flowering will be interrupted, and the soil is required to be moist and not waterlogged during the needle setting period.

Peanut can be planted with 300 500 mm of precipitation during the whole growth period, and the influence of moisture on yield in most producing areas is mainly due to the uneven distribution of precipitation.

3) Lighting. Long days are good for vegetative growth, and short days promote flowering. In short days, the plants do not grow sufficiently, bloom early, and bear little fruit per plant.

When the light intensity is insufficient, the plant is prone to growth and low yield. With sufficient sunlight, the plants grow robustly, bear more fruits, and have a high fruit satiety rate.

When the weather is particularly bad and the weather is particularly cold, coupled with the fact that the nutrients of the soil are not particularly sufficient, and there is a serious shortage of water, do not plant.

The land is particularly barren, and there are a lot of small rocks in it, and the nutrients that are supplemented are easily lost, and the rainfall is very low.

If the soil is very rigid, then don't grow peanuts anymore, because the peanuts grown in such land are very small and very unnutritious.

If the soil is not particularly fertile and hard, then it is not possible to plant peanuts, and the soil needs to be nourished to increase the fertility.

The soil quality is particularly poor, and the survival rate of peanuts is not very high, so even if they are planted, they will not be very profitable.

If you encounter some pests and diseases, or encounter some particularly dry soils, do not plant them, otherwise the yield will be affected.

If the temperature is particularly low, it is better not to plant it, because peanuts need a certain high temperature, and they also need very high humidity, and if the weather is very dry, it is better not to pretend.

Be sure to remember the time of sowing and the size of the grains, as well as the spacing in between, and pay attention to the time and frequency of watering.

When sowing, we must pay attention to the treatment of the seeds first, and choose some high-quality varieties for planting, and treat the fertility of the soil in advance, so as to ensure that Mr. Hua grows very well.