Why do you need to build greenhouses when planting? Disadvantages of greenhouse planting

In the process of agricultural modernization, greenhouses play a very important role, with the development of planting industry in various regions, the demand for greenhouses is also very large, and planting to build greenhouses, mainly because greenhouses have these advantages, conducive to the growth of crops.

1. Reduce humidity.

When drip irrigation is used in the greenhouse, the humidity in the greenhouse can be reduced, and the water can be evenly transported to the crop roots at the same time, which will not cause the reduction of ground temperature, and can effectively maintain the ground temperature.

2. Improve fertilizer utilization.

Once the greenhouse is built, drip irrigation can be used, which can directly deliver the fertilizer needed by the crops to the roots of the watery plants. Therefore, water and fertilizer will not be wasted, and drip irrigation can save 40%-50% of fertilizer and water saving.

3. Reduce pests and diseases.

All kinds of diseases in the greenhouse are mainly caused by excessive humidity, and the use of drip irrigation can reduce the humidity in the shed, thereby reducing the probability of pests and diseases, and reducing the number of drugs used.

4. Increase the temperature.

On sunny days, the temperature inside the greenhouse is more than 20 degrees higher than the outside, and at night it is 2 to 3 degrees higher. Most vegetables are grown at a temperature of 20-30 degrees Celsius and a minimum temperature of 5-8 degrees, while by growing in greenhouses, the temperature can be controlled for winter vegetable production.

5. Save time and effort.

Drip irrigation can be used in the greenhouse, just open the valve, lift the switch, there is no need for manual watering, so that you can also engage in other agricultural activities when watering, just master the irrigation time, shut down in time, very convenient, time-saving and labor-saving.

6. Increase output.

Greenhouses can create a suitable environment for crops, promote the normal growth and metabolism of crops, and reduce the phenomenon of slow or futile growth caused by improper use of water. So, to a certain extent, the crop matures early, increasing yields.

1. The problem of soil is not well controlled.

Compared to the land beneath the vastness of the world. Greenhouse farming is not as good as expected. Since the seeds are sown on one piece of land every year, the slow manure affects the quality of the land, and without the exposure of sunlight, the land deteriorates.

Vegetables have very high requirements for the land, and they have been attacked by fertilizers for many years. The quality of the vegetables is getting worse and worse. There are some farmers who grow in greenhouses, and at the beginning they still have harvest, and then slowly become unable to make ends meet.

2. Greenhouse farming has its own technical difficulties.

Although there are many relevant experts who come to the countryside, they are hands-on with greenhouse farming. However, the peasants' ability to understand is limited, perhaps because they are not well educated, or because they are not well educated. For the regulation of temperature in greenhouses.

The adjustment of the light is not clear, and the vegetables are growing worse and worse. There are even some relatively high-end technologies, and farmers don't know how to use the sprinkler! The expert's answer was too complicated, and the farmer didn't have the heart to listen to the lecture.

Greenhouse farming is becoming more and more difficult and complex.

3. The herd nature of farmers.

The peasants in China are simple peasants, and their most important purpose is to make money, in order to feed the family. Because they do not have a long-term vision of the market, they are always short-sighted when observing the market. When the time comes for the vegetables to be harvested, the supply and demand relationship becomes unbalanced, and the ** of vegetables becomes lower and lower.

Recovering the cost has become a difficult thing, which is also a difficult point in greenhouse raising.

Improve fertilizer utilization: drip irrigation is used to fertilize after the greenhouse is built, and the nutrients are directly absorbed by the roots. Pest and disease reduction:

Reduced ambient humidity can effectively reduce the breeding of pests and diseases. Maintain the alarm of the ambient temperature shield: be able to grasp and control the appropriate temperature.

Save time and effort: When growing crops in greenhouses, there is no need for manual watering or fertilization.

1. Improve fertilizer utilization

After planting crops is to build a greenhouse, drip irrigation can be used when fertilizing, and nutrients can be directly transmitted to the roots of crops for direct absorption, which will not cause waste of water and fertilizer nutrients, and at the same time, the shed is not breathable, which can maintain the concentration of carbon dioxide and the water will not be evaporated.

2. Reduce pests and diseases

When planting crops, the most worrying thing is the threat of pests and diseases, and most of the pests are because the land humidity is too high, and the crops planted in the greenhouse are mainly irrigated by drip irrigation, which reduces the environmental humidity, can effectively reduce the breeding of pests and diseases, and at the same time reduce the use of pesticides.

3. Maintain ambient temperature

Planting crops in greenhouses can well grasp and control the appropriate temperature, keep the ambient temperature between 20-30 degrees all year round, can effectively help the pure growth of crops, create a suitable environment for crops, not only promote growth and metabolism, but also allow them to be planted and produced all year round.

4. Save time and effort

When planting crops in the greenhouse, there is no need for people to water or fertilize, use the corresponding valve switches, open and close at the appropriate watering time, and at the same time can control the amount of watering well, which is not only convenient, but also saves labor costs.

1.When planting, the greenhouse is mainly used to play a role in heat preservation, moisturizing, adjusting the local microclimate of the jujube festival and reducing pests and diseases, which not only greatly improves the farmers' mountain sales income.

2.At the same time, it also provides a better quality of life for local consumers, and when building greenhouses, it is necessary to choose areas with north-south orientation, membrane facing the sun, fertile soil and shelter from the wind.

1. When planting, the frame refers to the canopy greenhouse, mainly because it can play the role of heat preservation, moisturizing, regulating the local microclimate and reducing pests and diseases, which not only greatly improves the income of farmers.

2. At the same time, it also provides a better quality of life for local consumers, and when building greenhouses, it is necessary to choose areas with north-south orientation, membrane facing the sun, fertile soil and enough cherry blossoms to shelter from the wind.

Planting vegetables and building greenhouses is because the climatic conditions in some areas are harsh, and the temperature is too low to plant various crops, and building greenhouses can provide a good growth environment for vegetables.

Planting vegetables and building greenhouses is because some areas have harsh climatic conditions and the temperature is too low to grow various crops, and building greenhouses can provide a good growth environment for vegetables, which can not only improve income, but also make the quality of crops better.

The greenhouse is suitable for building in a place with fertile soil, sunny and good irrigation and drainage conditions, and the steel structure frame should be selected when building, and then covered with plastic film, on the outside of the film, you can use a straw mat as a warm device for night and winter.

Greenhouse planting is closed planting, if there are pests and diseases, it will immediately spread indoors, so it is necessary to choose varieties with strong disease resistance, and the planting area of the greenhouse is limited, and it is necessary to choose varieties with high yield and shorter plants to save space.

The plastic film will cut off the connection between the greenhouse and the outside world, can not receive the irrigation of rainwater, can only be artificial fertilization and watering, in the fertilization, it is necessary to pay attention to the fertilizer can not be applied too much, nor too little, at the same time to keep the temperature in the greenhouse at 25-28, the relative humidity to keep at about 65.

There are several reasons why you need to build a greenhouse to grow vegetables:

Increase temperature: A relatively closed environment is formed inside the greenhouse, which can maintain a relatively stable temperature while preventing wind and rain, which is conducive to temperature management and optimization of the planting environment.

Adjust humidity: Building a greenhouse can also adjust the air humidity such as trouser sections, reduce air circulation, maintain a certain meteorological balance, reduce temperature, and prevent vegetables from drying out.

Prevention of pests: building greenhouses can also increase the protection of plant pests and viruses, and the internal environment of greenhouses is relatively closed, which can effectively reduce or avoid the reproduction and spread of pests, and reduce the frequency and quantity of pesticides.

Improve yield: Proper temperature, humidity and high-quality land can help vegetable seeds mature more quickly and increase yield, while providing sufficient sunlight for plants for a long time can more easily promote the growth and development of vegetables and increase yields.

In short, building greenhouses can optimize the vegetable planting environment, improve the yield, quality and pest control effect of vegetables, and help people better produce and preserve, meet market demand and not rely on natural factors.