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Any farmer and gardener is interested in good harvest... When building greenhouses, especially capital ones, attention is paid to its thermal insulation.
The more airtight the greenhouse, the less air penetrates into it and, accordingly, carbon dioxide... And he is necessary for the normal growth and fruiting of crops not grown in the open field.
What is carbon dioxide for?
In addition to mineral and organic fertilizers, watering and temperature conditions, plants need carbon dioxide. Some gardeners call it fertilizer. He participates in photosynthesis - "metabolism" in the body of the plant. That is why it is very important that a system for supplying carbon dioxide in the greenhouse is organized.
Co2 content in greenhouses is important for normal plant growth. The yield of horticultural crops depends on its sufficient amount.
Greenhouse gasstimulates earlier and more active flowering, increases fruiting. It is more important than mineral fertilizers.
CO2 participates in the synthesis of dry matter of plants by 94%, and only 6% is formed with the help of mineral fertilizers. In addition, it increases the resistance of plants to diseases and pests.
In the photo below you can see the options for supplying carbon dioxide for the greenhouse:
Gas supply options
In conventional outdoor cultivation or in film greenhouses, plants receive carbon dioxide from the atmosphere. In capital and industrial greenhouses, various methods and devices are used to saturate the air with it.
Technical means in industrial greenhouses
Large farms often use boiler waste gas (smoke). Before supplying gas to greenhouses, it must be cleaned and cooled, only after that it is supplied to the beds through the gas pipeline system. Equipment for its selection includes a condenser with a built-in fan, a metering unit and gas distribution networks.
Distribution networks - these are polyethylene sleeves with perforation, stretched along the beds. Such a system should have equipment that monitors the composition of the gas for the content of impurities that can threaten the health of people working in greenhouses.
The total cost of such equipment is quite high, the question is whether the costs will pay off.
An easier solution would be to use solid carbon dioxide - dry icethat can be laid out in greenhouses.
Small farm or home greenhouses
To supply gas to small greenhouses, use gas generatorsthat emit carbon dioxide from the air and pump it into the greenhouse. It produces up to 0.5 kg of gas per hour. Its advantages:
- does not depend on external sources;
- generates absolutely pure carbon dioxide in the required volumes;
- has a touch dispenser;
- easy and inexpensive to maintain (filter replacement - once every six months);
- does not affect the temperature and humidity in the greenhouse.
The use of liquefied gas in cylinders is also possible. But this way will require additional equipment for heating and regulating the gas supply, that is, reducing the pressure. Only through such devices is it possible for the gas to enter the greenhouse, which is safe for plants.
If the farm includes a livestock farm, it is possible to arrange air exchange between the greenhouse and the livestock building. Animals breathe out carbon dioxide, which is so necessary for plants. The greenhouse can be built so that the two rooms have a common wall.
Two holes are made in it - above and below. They are equipped with low-power (to avoid drafts) fans. As a result, animals get oxygen from plants, and those get carbon dioxide.
The disadvantage of this method is that it is possible to achieve the necessary balance only by experience: where to attach the greenhouse to the pigsty or rabbitry? And how to regulate the incoming amount of gas from different animals.
In a greenhouse on a personal plot, they use manure, which, decomposing, emits carbon dioxide in an amount sufficient for its inhabitants - cucumbers, tomatoes and other crops.
If you put a barrel of water in a greenhouse and put a dozen large stalks of nettles in it, you can get another natural source of carbon dioxide. Water needs to be refilled periodically. This method has one drawback - a rather unpleasant smell of decomposing nettle.
Another source of carbon dioxide is alcoholic fermentation... Some gardeners put containers with mash between the plants - water, yeast and sugar. But this method is costly and unreliable, since the fermentation period is short and it is expensive to prepare new cans with mash.
The main natural source of carbon dioxide for plants is air... Opening the vents is the simplest way to supply carbon dioxide into it. The night breath of plants and the release of carbon dioxide from the soil also fills the greenhouse with gas.
Plants receive carbon dioxide and from the soil, which is formed as a result of the decomposition of organic substances contained in it, respiration of roots and microorganisms. But this is only a quarter of their daily requirement.
Many are interested in the question of whether it is possible to arrange carbon dioxide in a greenhouse with their own hands? Let's try to answer this question.
Do-it-yourself carbon dioxide generator for greenhouses - is it justified or not?
Making a gas generator with your own hands is possible, but not rational. It will require not only large financial investments, but labor costs.
In addition, a greenhouse CO2 generator requires a separate room, as this is a device that generates a large amount of heat, in fact, an oven.
It is much easier and cheaper to use the available technical, biological or natural sources of carbon dioxide.
Several rules for gas supply
- CO2 assimilation plants directly depends on lighting. Under artificial lighting, the gas is absorbed better by plants than in summer natural daylight. This means that during the winter period the gas fertilization should be less than in the summer.
- Gas supply time plants are no less important than its quantity. The first feeding during the day is best done in the morning, about 2 hours after daylight. During this time, the plants absorb the gas best. The second feeding is done in the evening, 2 hours before dark.
- Each culture has its own consumption volume carbon dioxide. Therefore, be sure to ask how much gas is needed for tomatoes, peppers or flowers. Excess gas can damage plants.
Knowledge is power, the better we get to know our plants, the more gratefully they give us their fruits. Good luck and good harvests. Well, choose the system for supplying carbon dioxide in the greenhouse yourself, depending on your capabilities and preferences.
How to allocate carbon dioxide for a greenhouse at home, see the video below: