Under what covering material is it better to grow cucumbers?
The harshness of climatic conditions in Russia is forcing many gardeners to build greenhouses or set up greenhouses. But this is a very expensive and complicated matter, so the desire to find an easier way becomes natural, which is the cultivation of vegetables under a layer of covering materials.
General information
Planting cucumbers under covering material is the most acceptable solution because this plant is extremely capricious. This is quite predictable, because the cucumber was originally grown in hot tropical forests, where it is constantly damp and warm. Even in those regions that are considered warm by Russian standards, the cultivation of such plants is difficult and that is why they are trying to plant them under cover. The skillful use of modern technologies allows you to get stable yields almost everywhere. Moreover, weather whims, inevitable in some cases, will not spoil them.
If the shelter is made in accordance with all the rules of agricultural technology, it is possible to sow seeds in the middle of spring or move seedlings to free ground. Let the frosts return, they no longer pose any danger. As a result, the receipt of the first collection is accelerated.
Additionally, they note such benefits from special shelters as:
- reducing the harmful effects of sunlight;
- moisture retention in dry weather;
- prevention of invasions of various parasites and insects.
Varieties
When farmers realize that they essentially have no alternative to using a covering system, the next question logically arises - what to use? Now the solution to the problem is mainly:
- constructions with a simple polyethylene film;
- film with air bubbles;
- reinforced polyethylene;
- polyvinyl chloride;
- non-woven material (spunbond).
Leading positions in the market are occupied by opaque canvas and film. They can even be combined with each other. In this case, the beds with seedlings are covered with a cloth that stops the destructive effect of cold and wind. Polyethylene film is stretched over this web already. Now it is worth disassembling these options in more detail and clearly.
polyethylene
Polyethylene films for covering plants are available in various designs. The main difference between them is due to the thickness of the protective material. There are options for 120, 200, 150, 30, 100, 60 microns. Unlike a number of other coatings, polyethylene with such parameters transmits sunlight. It is elastic and does not let moisture in from the outside, it does not collapse if cold suddenly sets in.
It should be remembered that when growing plants that are susceptible to direct sunlight, it is advisable to use film shelters of different colors with a scattering effect. The ability to cover plantings from frost directly depends on the density. But in any case, this protective function should not be absolutized.
But the fact that a denser film turns out to be stronger is much more important.
A transparent material, with all its advantages, is easily damaged by ultraviolet rays, therefore, when choosing it, it is required to give preference to light-stabilized coatings.
non-woven
Non-woven spunbond now has no less popularity than polyethylene. It allows you to form a shelter even without frames. This material does not harm landings, it is soft. Even with close contact, it does not deform plants. The non-woven coating will let in light, air, and precipitation, and will not collapse itself under the action of ultraviolet radiation.
The strength of non-woven fabrics is well known, but not everyone knows that such a material restores the structure, if it is sewn together, glued together. Can be spunbond and washable. It is permissible to water cucumbers directly from above, without removing shelter each time. This significantly reduces the complexity of care.
But it is important to understand that the canvas will give a good effect only if the basic requirements of agricultural technology are met:
- the right choice of variety;
- normal warming up of the soil;
- selection of healthy seeds;
- accurate assessment of the required film density;
- normal slope of the beds;
- protection from animals and birds (which mainly tear the covering material to get to the plants).
Which is better?
The decision to shelter cucumber beds with your own hands logically flows into the search for an answer to the question - what is the best way to cover them? Importantly, when answering it, it will not be possible to simply refer to the advantages and disadvantages of the two options already discussed above. If the goal is to save the vegetable from early frosts, it is recommended to use a white spunbond stretchable on arcs. Most suitable non-woven material with a density of 0.023 kg per 1 square. m.
The allowable variation in this parameter is from 17 to 30 g per 1 sq. m. For full-fledged winter shelters in the form of greenhouses with arcs, materials with a density of 42 to 60 g per 1 square meter are recommended. m.
When arranging greenhouses, a film with multi-colored sides (white and black, respectively) also brings a good result.The light side should be on top, it reflects excess light, and the dark surface makes it difficult for weeds to grow. When choosing a classic polyethylene film, it is worth giving preference to its reinforced varieties.
No other type of polyethylene will provide the same strength and resistance to mechanical damage. The reinforcing layer is located in the middle between the two main layers. Most often, a particularly strong film is also protected from ultraviolet radiation.
It is worth considering such an alternative as polycarbonate. It is difficult to find a coating that is more resistant to precipitation and gusts of wind. Bacteria do not multiply in polycarbonate, it is relatively light, mechanically strong and almost as good as glass in light transmission. Another important circumstance is that polycarbonate does not light up. Of the minuses, one can name the fact that it is unsuitable for layout on the ground, it only allows the arrangement of permanent greenhouses and hotbeds.
Shelter and care technology
When preparing beds in open ground, you should choose a well-lit and as warm place as possible, it is there that it will be easier for the shelter to complete its task. The width of each strip is 0.7 m, and you need to dig deep into the bayonet of a shovel. Be sure to scatter organic fertilizers, selected as needed, they are evenly distributed with a rake along with the top layer. Then planting furrows are formed. A couple of ampoules of a liquid stimulant are dissolved in 10 liters of water at a temperature of 50 degrees and the area is thoroughly shed.
It is not worth planting seeds too often, 1 for every 0.5 m is enough. Covered cucumbers need to be watered every three days, only with warm water. At least once a week, if the weather is warm, the shelter is raised to add light.
Feeding usually begins in May, but be sure to wait for the air to be no cooler than 20 degrees during the day. The best dressing for a covered vegetable is sodium humate: 30 g is diluted in 10 liters of water and 8 liters of the prepared solution is poured into 1 sq. m of plants, and bird droppings are introduced once a month for additional fertilizer.
To provide full shelter, you need to put an arc support. Moreover, there should be several arcs at once, they are set at an equal distance from each other. The canvas should be thrown over at night, covering it from above with polyethylene hanging down to the surface of the earth. These edges are pressed down with bricks, boards, pipes without sharp parts. Then neither the air will get inside, nor the various animals.
The recommended height of the arches is about 1 m. In light frosts and calm, when the sun shines moderately, a simple non-woven fabric is enough for protection. For the summer, it is better to refuse plastic wrap. But protective sheets still have to be used in the heat to cover from the sun. Occasionally, shelters are placed in the autumn months if early frosts began before the last harvest.
You can learn about the varieties of covering material from the following video.