What should I pay attention to when growing pineapples in greenhouses in the north?

Pineapple is native to Liangguang and Yunnan in China and is a tropical crop. The plant is 70-80 cm tall, the leaves are narrow and long, with serrated edges, and the weight of a single fruit is generally kilograms. In 1997, the northern greenhouse was successfully introduced, with a yield of more than 5,000 kilograms per mu, and the shape, color and taste of the fruit were better than that of the pineapple growing on the ground in the place of origin, and a pineapple plant growing a pineapple.

When the pineapple grows up, it looks like a small ball placed on a lotus flower. Pineapples are grown in warmer climates, where they can grow between 15 and 40 and will not grow if they fall below 10.

Pineapple is a typical tropical fruit that is temperature-sensitive during its growth. In general, the location where pineapples are planted requires an average temperature of about 25 degrees throughout the year, and if the temperature is lower than 15 degrees, pineapples will grow slowlyRemove the seeds from the fruits of jackfruit, wash them with water and soak them in a solution of potassium permanganate for 2-3 minutes. The treated seeds are planted in soil suitable for growth, the temperature is controlled at 22 -25, and the soil is kept moist, and germination can be achieved after half a month.

Variety selection and planting conditions. Pineapple cultivars mainly include Balinese, thornless caine, etc. Among them, Bali has strong adaptability, a single fruit weighs kilograms, the flesh color is dark yellow, the sweet and sour is moderate, the flavor is sweet, the quality is high, and it is suitable for fresh food, which is the main cultivar at present.

Since the pineapple tree is a small tropical tree, it is more suitable for moist soil and deep fertile sandy loam soil and brown forest soil. It is tolerant of mild salinity and grows normally on soils with a pH value.

Seedling transplanting: transplanting in Beijing is generally from the end of April to the beginning of May. It is planted with double rows, the width of the furrow is 90 cm, the distance between the furrow is 60 cm, and the plant row spacing is 20 to 50 cm.

When transplanting, the top bud, the bud planting depth of 2-3 cm, suck the bud 3-5 cm, wait for the bottom to become relatively dry, and then put the bottom in the water, try to only let the bottom in the water, if the bottle mouth is too big, you can insert the top flower with a toothpick to fix. Remember to change the water frequently every day, and it will start to grow roots in a week.

It should be noted that pineapple planting in greenhouses is suitable for growing in an acidic soil environment, and it is also necessary to pay attention to temperature management, sufficient light, suitable water and fertilizer management, flower and fruit management, and prevent the occurrence of some pests and diseases.

When planting pineapples in greenhouses in the north, we must pay attention to strictly controlling the temperature and humidity of pineapple growth, fertilizing pineapples in a timely manner, and doing a good job in the prevention and control of pineapples, so that pineapples can grow better and there will be no insect pests.

Pay attention to the temperature, pay attention to the lighting conditions, but also pay attention to the soil, and pay attention to the pineapple planting skills, to learn how to grow pineapples in the greenhouse.

Preamble: When planting pineapples, the requirements for soil and environment are relatively high. When planting pineapples, cut off the crown buds of pineapples, do not leave the pulp, tear off the small leaves at the bottom, expose the white part, pay attention to the roots under the horizontal leaves, do not be destroyed, and put the canned teeth in a ventilated place to dry for two days until the incision is dry.

Prepare a glass bottle, pour water into the glass bottle, put these crown teeth in the container, make sure that the bottom end of the crown teeth of the pineapple is in contact with the water surface, but avoid touching the water surface to avoid rotting, and wait for the root system to grow about a centimeter or so at the bottom before transplanting. Pineapple is a very common tropical fruit, pineapple is more adaptable to the soil, their roots are relatively shallow, so the soil is best loose and fertile, well-drained sandy, or laterite, it is not recommended to choose more clay soil, the pH value of the soil is between 4 is the most suitable. <>

The tropical fruits on the side like moist areas, so the growth temperature is best around 15 40 degrees, in winter to pay attention to keep warm, so as not to be frost damage, pineapple drought tolerance is very strong, but the growth stage also needs a certain amount of water, so during the planting period to ensure sufficient water, if in the rainy area, pay attention to the soil should not accumulate too much water, otherwise it will lead to infection or rotten roots. When the pineapple is cultivated into a new root system, it can be planted in a pot, because the soil of the potted plant has a very good permeability, it is necessary to prepare drainage holes in advance, carefully plant the new ones in the pot and water them in a cool and ventilated environment, so that the seedlings can grow quickly. <>

In order to make the seedlings more adaptable to the environment, we should avoid exposure to the sun, water frequently, and increase the humidity of the environment, so that the pineapple seedlings can adapt to the new environment as soon as possible. If there is a lack of sunlight for a long time, then the leaves will turn yellow, and if the light is too strong, it is also not conducive to the growth of pineapple seedlings. So when we grow pineapples, we must pay attention to the soil and temperature.

Pineapples are grown on loose, fertile, well-drained sandy or mountainous red soils with plenty of sunlight.

First of all, the temperature must be kept above 25 degrees, it must be planted in a warm environment, the soil must be particularly fertile, the temperature and humidity must be particularly high, high-quality seeds must be selected, and germination should also be done.

When planting pineapples, there must be sufficient sunlight, and secondly, you should also water more and fertilize more, and cut off useless branches and leaves, so that pineapples can absorb more nutrients and grow better, and the corresponding nutrient solution should also be added.

It is necessary to ensure the moisture of the soil, to ensure the fertility of the soil, to water in time, to do a good job in the drainage system, and to replenish organic fertilizer in time.

<> pineapple grows at a temperature range of 15-40 and a suitable growth temperature range of 24-27. If the temperature is below 15, the pineapple grows slowly. If the temperature is below 10, the pineapple basically stops growing.

If the temperature drops to 2-5 for 1-2 days, the leaves of the pineapple plant turn yellow and dry up gradually, the surface roots at 5 cm die, the peel turns black, and the flesh gradually shrinks.

1. Pineapple planting conditions and temperature

1. Suitable temperature.

The growing temperature range of pineapple is about 15-40, and the suitable growing temperature range is about 24-27.

2. Low temperature effect.

1) If the temperature is below 15, the pineapple will grow more slowly. If the temperature is below 10, the pineapple basically stops growing (new roots stop growing, leaves can't continue to grow, and fruits stop developing).

2) If the temperature is reduced to about 2-5 and lasts for about 1-2 days, there will be symptoms of low temperature hazards, which are mainly manifested as: the leaf color turns yellow and gradually dries up, the surface root system at 5cm dies, the peel color turns black, and the flesh gradually shrinks.

3) If the temperature drops to 0 and lasts for more than one day, the pineapple plant mainly manifests itself as heart leaf rot, root system freezes to death, and fruit shrinks and gradually rots.

4) If the temperature drops to about -2, the pineapple plant will freeze to death.

3. The impact of high temperature.

1) Although pineapple is a tropical fruit, when the temperature is too high, it will also affect the growth.

2) In general, when the temperature reaches 40, the growth rate of the plant will not be inhibited, but the leaves of the plant will be burned.

3) When the temperature exceeds 40 or more, most of the leaves of the plant will gradually dry up, and if there is a prolonged drought at this time, it will cause some plants to die.

2. What terrain and soil are pineapples suitable for planting?

1. Pineapple is suitable for planting in deep soil, loose and fertile soil, rich organic mold quality, good drainage and irrigation performance, and sandy loam soil or mountainous laterite soil with pH in between.

2. Pineapple is an acid-loving plant, if the pH of the soil is above, the growth rate of pineapple will gradually decrease. If the pH of the soil is above 7, the plant will grow back and become smaller and smaller, and the leaves will become shorter and narrower, and eventually the plant will die.

3. Different varieties of pineapple have different requirements for soil pH, among which the suitable pH of caine pineapple, Spanish pineapple and other varieties of pineapple is suitable pH.

Can you grow jackfruit in the north?

Jackfruit can be grown in the north, but it can not bear fruit under natural conditions and can only be grown in greenhouses, because jackfruit is native to the tropics and needs to be grown in a high temperature environment. If it is planted in the open field in the north, it is easy to freeze to death because of the low temperature. Jackfruit is a tropical crop that is widely distributed in Nepal, India, and Malaysia.

It mostly grows in frost-free areas with abundant rainfall, and the average daily temperature of the Zen people is above 22.

How to grow jackfruit in the north.

1.Temperature: Jackfruit has high temperature requirements.

It grows in the tropics and the average annual temperature needs to be above 22. The plant is not cold-tolerant, and the temperature in winter should not be lower than the soil: jackfruit planting soil requires deep, loose, sufficient fertility and good water storage.

It is best to make friends nearby and make a good profit to facilitate the transportation of fruits. 3.Lighting:

Fertilization: Fertilization is the key to high jackfruit yields. Nitrogen fertilizer should be the main fertilizer at the young tree stage, and phosphorus and potassium fertilizer should also be used.

Be careful not to use a single kind of fertilizer.

<> "Buy a pineapple from the fruit store that is not too ripe, has firm leaves, and is a healthy green (not yellow or brown)." The skin of the pineapple must be golden brown; Make sure the pineapple is not too ripe, gently lift the leaves, if the leaves are easily picked off, it means that the pineapple is too ripe and does not meet our purpose this time; Make sure the roots of the leaves are free of scale insects.

Generally speaking, single-row planting is the most common planting method, but it is generally suitable for mountainous areas with relatively complex terrain. There are also many pineapple planting areas in China that adopt a single row planting method, which is less difficult to grow and can reduce the requirements for the geographical environment. Like some areas, it has a large slope, so it is better to choose a single row planting method.

The height of the seedlings is required to be more than 6 cm, the stems should be thick, the leaves should be dense, the buds should be straight, the growth should be robust, and there should be no pests and diseases. The seedlings transported in other places should be dried for 1 12 days, because the heat accumulates during the transportation process, and the evaporation of water is easy to cause the seedlings to rot. The depth should be controlled at about 40 centimeters, so that the plants and roots in the soil are dug up, so that the pineapple tree can have better living conditions and will not be affected by other trees.

If there is a certain slope, it is best to set up a terraced pattern to plant, which has an advantage in soil and water conservation. It is cultivated in about 61 countries and regions around the world. In addition to China, it is mostly cultivated in Thailand, the United States, Brazil, Mexico, the Philippines and Malaysia.

It has good drainage and strong permeability, but because pineapples are drought tolerant and barren, they are also suitable for planting on brick red soils with shallow soil layers and weathered thin core soils. The black sandy soils of red or yellow subsoils are suitable for cultivation. The optimal soil pH is that the neutral soil is poor, and the alkaline soil pineapple does not grow.

At this time, the leaves of the plant will take on a red and yellow color. Finally, too much precipitation can cause plant roots to rot and seriously affect the yield of pineapples, so we should pay attention to timely drainage, and pay attention to the amount of watering while watering to avoid overwatering.

Pineapples are best planted in autumn because seedling pineapples need sunlight, but they are afraid of strong sunlight, so planting in autumn can avoid summer. Pineapple needs a lot of potassium, and it is better to increase potassium fertilizer appropriately. In terms of specific requirements, the application of nitrogen fertilizer is heavy first and then light, potassium fertilizer is first light and then heavy, and phosphate fertilizer is applied as basal fertilizer.

Pineapples can be grown in general soil, and we don't need to think too much about where to grow pineapples. However, it is important to note that pineapples cannot be grown in poor, sticky, poorly drained, poorly permeable soils with a low water table. Finally, the main thing is that the soil should be slightly acidic, not alkaline.

When we plant pineapples, we don't plant them on a relatively warm foundation, because the warm foundation is not suitable for the growth of pineapples, and the pineapple is not suitable for the temperature here, as well as the moisture, and the soil are not suitable.

Jackfruit cannot be grown in the north.

Jackfruit is vertically distributed below 300 meters above sea level. It needs a high-temperature, humid and frost-free climate, suitable for areas with an annual average climate of more than 22-24, an average temperature of not less than 12 in the coldest month, an absolute low temperature of not less than 0, an accumulated temperature of more than 7500 and an annual rainfall of 1200-1800 mm.

Seedlings and young trees are sensitive to low temperature, and when the radiative low temperature is 0, the terminal buds and leaves are cold-damaged, and the shoots appear when they drop to -2. When the average daily temperature of advection low temperature was 9, the adult trees suffered severe frost damage.

There were more than 50 days of rain and low temperature (weather) in the production area, and many plants froze to death. The drought resistance is moderate, the fruit is often dropped after a long drought, the rainfall is too much during the flowering period, and the lack of harmony also affects pollination.

The process of harvesting jackfruit

Jackfruit trees bear fruit in 6-8 years; Thirty years of growth to the peak fruit period, there are large and small years. Generally, it blooms in February and March, and the fruit ripens in July and August. In some places, there are also two flowers and two crops a year.

Picking the mother tree should choose fast-growing, early fruiting, high yield, and at the same time, the fruit should be selected from the lower part of the trunk, the fruit is large, the skin and flesh are thick and sparse, and the flesh is thick and fully ripe.

The fruit is softened, then the seeds are broken and removed, washed with water and dried in the shade. The seeds are not resistant to storage, and the viability can only be maintained for about 20 days, so they should be sold and sown as soon as possible.