Why do you need to remove the plastic paper after planting grass and plum seedlings in the greenhous

There are several reasons to cover a plastic greenhouse:

1. Temperature is the basic condition to ensure the normal growth of agricultural crops. Greenhouse is a kind of thermal insulation agricultural facility that creates a suitable environment for the normal growth and rapid growth of agricultural crops. Thermal insulation is an important work in greenhouse agricultural production, and it is also necessary to choose a suitable covering material.

2. The plastic greenhouse has good light transmittance, good uniformity, economic and practical, low cost, and various types. Vegetable farmers or fruit farmers can choose according to the needs of production and planting.

3. Plastic greenhouses are easy to build, easy to use, and less investment, and are widely used by countries around the world with the development of the plastic industry.

4. The use of bamboo, steel and other materials, and covered with plastic film, to build an arched shed, for the cultivation of vegetables, can be early or delayed, improve the yield per unit area, and have to prevent natural disasters, especially in the northern region in the early spring and late autumn off-season fresh vegetables.

5. Plastic greenhouses are cold-proof and insulated, resistant to drought and waterlogging, early cultivation, postponement of cultivation, prolonging the growth period of crops, and achieving the purpose of early maturity, late maturity, and increased and stable yield.

Strawberries are highly nutritious and contain more than apples and grapes. Greenhouse strawberry cultivation is easy, easy to manage, low production cost, high yield and good income.

1. Cultivate strong seedlings.

In early to mid-August, select the sturdy seedlings that grow on the strawberry stolons in the early stage and transplant them into the open seedbed or plastic bowl for seedling.

2. Reasonable colonization.

Before planting, the soil in the planting greenhouse is ploughed. At the same time, 3000 4000kg of manure per mu is applied, 50 60kg of compound fertilizer is used as the base, and then furrowed, furrow width (even ditch) 1 meter, 6 meters wide standard greenhouse can be made of 6 furrows, furrow depth 25 30cm. In mid to late September, new leaves were selected to carry out normally, with symmetrical leaflets, dark green leaf color, thick petioles, large leaves, robust growth, and good yield.

3. Temperature and humidity control.

Generally, the temperature is controlled between 25-28 degrees during the day, not more than 30 degrees, and 7 degrees at night. The first flowering period is maintained at 25 degrees, and the flowering stage is mastered at 23 degrees. Between the end of December and the end of January, when the shed temperature is lower than 5 degrees, a small arch shed should be set up in the greenhouse, and three layers of film should be used for insulation at extreme low temperatures.

The humidity in the shed should be controlled below 80% before flowering, and it is advisable to control 60% from flowering to fruit expansion. In order to prevent the onset of high temperature and high humidity, spray 800 times of "new high fat film" emulsion, once every 10 days or so, a total of 2 times. By April of the following year, when the temperature rises significantly, the enclosure film on both sides of the greenhouse can be removed, and the ventilation can be increased, which can play a role in cooling and humidity, and prolong the picking period of the fruit.

Fourth, fertilizer and water management.

According to the growth of strawberries, timely supplement phosphorus, potassium fertilizer and multiple trace elements. There should be sufficient water throughout the growth process, the soil moisture can be slightly drier during the flowering period, and more water is required during the vigorous growth period of strawberries and the swelling period of berries. Irrigation can be combined with fertilization, and the fertilizer is dissolved in water and prepared into a solution of about 1000 times.

After the spring of the second year, as the temperature rises and the production speed accelerates, in order to avoid the acidification of strawberry fruits, potassium fertilizer should be increased, and potassium sulfate should be applied about 5 kg per mu. In addition, before flowering, young fruit stage, and fruit expansion stage, spray "Zhuangguo Tiling" + urea plus potassium dihydrogen phosphate solution, and apply kilograms of urea to supplement the nutrients required for fruit growth and improve the quality of grain filling.

5. Pest control.

The main diseases and insects are aphids, leaf mites, gray mold, powdery mildew and bud blight. For aphids and red spiders, 10% imidacloprid can be sprayed 4000-6000 times and 2000-2500 times to kill mites. Botrytis is most likely to occur in high temperature, high humidity and strawberry growth period, and can be controlled with 50% Sukrin 800 times, and the effect is very good.

For bud blight, pick old leaves, ventilate and transmit light, and spray 1000 times polyoxymycin or 600 times dichloride aqueous solution every other week.

Greenhouse insulation.

First, work the greenhouse film.

First, double membrane coverage. Putting another layer of film under the drip-free film can significantly increase the temperature in the shed.

Secondly, remove the dust, dirt and snow on the greenhouse film in time to increase the light and increase the temperature of the shed.

Again, cover with a covering. Cover the straw curtain or corn straw at night, you can increase the temperature 1 2, if you add a layer of thin toma, you can increase the temperature 2 3, on this basis, add a layer of film, reduce water evaporation, avoid heat loss. It is also necessary to pay attention to the timely unveiling of the flowers to promote photosynthesis.

Second, start from the surrounding environment of the greenhouse.

First of all, the polyester aluminized film can be hung on the north side of the greenhouse to form a reflective curtain, so as to increase the light in the shed and increase the temperature of the shed.

Secondly, dig trenches around the greenhouse and fill in insulation materials such as horse manure, weeds, and straw to increase the ground temperature.

Finally, lighting smoke around the greenhouse can prevent the heat from outside the greenhouse from radiating to the air and reduce heat loss.

3. Manage the interior of the greenhouse.

First of all, raise the ground temperature. Generally speaking, if it is cultivated on high ridges, it is covered with plastic film; If it is cultivated in a flat furrow, a small arch shed is erected. You can also dig a pool every few meters in the greenhouse, and lay a plastic film at the bottom of the pool, fill the pool with clean water, and then seal it with a transparent film, so that the water can absorb heat at noon and release heat at night for heating.

Secondly, the heating is warmed. You can add a stove or turn on the heating in the shed, but pay attention to the installation of a chimney to remove the gas from the shed in time to prevent flower gas poisoning. At the same time, firewood and grass should not be burned in the shed, as the smoke can damage the flowers.

Again, increase the application of fertilizer. When organic fertilizer is decomposed, it can not only provide nutrients for flowers, enhance the frost resistance of flowers, but also release heat, so fertilizer such as horse manure and broken grass can be applied in the shed. In addition, the grass ash is gray-black, with strong heat absorption ability, and can be scattered appropriately on the greenhouse ground.

You're talking about growing vegetables.

Bai greenhouse?

du？I have a relative who grows vegetables, and I went to his DAO college shed to see it. There are genera in the greenhouse.

A thermometer to monitor the temperature in the shed. Because the growth of vegetables also has a certain suitable temperature, too high or too low will not work. When the temperature is low, there is a thick quilt on the greenhouse, and the quilt will be put down to keep warm on cloudy days or at night.

There is also heating inside, and it is heated when the temperature is really low. As long as it is not cloudy during the day, the temperature will be very high near noon. Therefore, there will be ventilation holes on the wall at intervals in the shed, and the ventilation holes should be opened to adjust the temperature when the temperature is high.

The fan of the easy agricultural greenhouse is quite good, it can automatically adjust the temperature and maintain the ideal temperature in the shed, but also reduces the indoor humidity, provides an ideal environment for the flowering and fruit setting, improves the flowering and fruit setting rate, and lays a good foundation for increasing production and income.

Use the greenhouse heating hot blast stove to quickly increase the temperature in the shed.

Due to the complementarity of optics, the transparent blue substance has the greatest absorption of red light and infrared rays, and the energy of red light and infrared rays is the largest in visible light, that is, the heat that can be converted is the highest, so it is conducive to increasing the temperature of plastic greenhouses.

What you call blue.

Plastic film is a kind of non-ferrous agricultural film, in addition to black, purple, yellow, silver gray and other colors. The color of agricultural film is different, and the absorption and reflection of sunlight are also different, so the impact on temperature, disease and insect conditions, weed growth is also different, and the impact on the growth of different crops is very different.

The characteristics of blue agricultural film are: good thermal insulation performance, light transmittance is higher than that of ordinary film under low light conditions, and lower than ordinary film under strong light conditions. Suitable mulching of rice seedlings can increase the tillering of seedlings, grow short and strong, and significantly improve the seedling growth rate and seedling quality.

It is used to cover vegetables, cotton, peanuts, potatoes, strawberries and other crops, and also has obvious effects of increasing yield and improving quality.

Therefore, if you want to use blue agricultural film, you must determine according to the type of crop, and the effect of not using blue agricultural film is better than ordinary white film.

The color absorbs light well, which is conducive to increasing the temperature in the shed.