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Early spring crops such as watermelon and melon
6-7 Membrane Coverage In the past two years, the spring planting of watermelon has been performed well. In the early spring, the early planting of watermelons and the promotion of the morning market are the preconditions for high yields of watermelons in early spring. In general, the earliest listed watermelon in the shed can be harvested at the end of April. In the early spring, when watermelons were planted in arch shelters, they were in a cold season in early spring. In order to improve the insulation of greenhouses, vegetable farmers came up with many tricks, and the coverage of 6-7 membranes was one of them.
According to Changle County Guanon Zhang Wei, the 6-7 film cover solves the low temperature problem and can resist the low temperature of -10°C for a short time, ensuring the conditions needed for the growth of watermelon in the early spring low temperature season, and realizing the watermelon market in the early spring. How is this 6-7 film set up?
A three-layer membrane, namely a greenhouse membrane, two membranes, and three membranes, is arranged on the arch shed. A film refers to a film of exposed greenhouses outside the arches. This film requires transparency, fog removal, and droplet removal. In addition, a layer of film is provided at 20-30 cm below the layer of the film as two films, and a film of three layers is added at 30 cm below the film.
The two films and the three films not only require better light transmission, but also have better anti-fog properties and drip properties so as to avoid adverse effects due to dripping and fogging. For example, the second membrane can be 20-30 cm from the lower end of the shed film. Use the stanchion to set up bamboo rafts and iron wire in accordance with the arc of the shed, then set the membrane on the raft and wire, and cover the base with the soil at both ends. The overlap of each film is 10 cm. Around, use iron clips to seal the seals. The three membranes are under the two membranes, and the installation measures can be the same as those of the two membranes, but it should be noted that the distance from the two membranes can be appropriately increased.
A small arch shed can be propped up in the arch shed, covering the arches with different lengths and covering the membrane. Two or three floors can be set. The vaulted space supported by bamboo shooters is called a small arch, also known as a small arch. If the membrane is covered by seven membranes, three small sheds should be set from the outside to the inside. The length of the used bamboo cymbals is 4 meters, 3 meters and 2 meters in order. If some vegetable farmers choose to cover 6 membranes, only 2 small sheds are added. Yes, that is, the length of bamboo pole used is 4 meters and 2.5 meters.
In addition, a layer of plastic film covering the ground is the 7th film. The seventh layer is the film closest to the vegetable. The quality of the film has a great influence on the heat preservation. Immediately after planting, the watermelon should be covered with a plastic film. This layer of film can play a role in keeping warm and has a certain degree of herbicidal action. When covering this film, check whether its thickness is uniform and whether the pleats are broken. To choose the same transparency, the appearance of smooth, bright, uniform thickness, horizontal and vertical tensile force are better to cover the film. Avoid use of poor quality plastic film, or harmful gas released from the plastic film may cause gas damage, affecting the later growth of watermelon.
After the multi-layer film was added to the multi-layer film in the spring shed, the temperature of the shed was guaranteed, and the light transmissibility was bound to be affected. How to solve this problem in production? In early spring, the awning watermelon is usually planted during the period from the beginning of spring to rainwater. What should be paid attention to in its field management?
First of all, can not be flood irrigation planting, it is best to raise the temperature in advance watering, planting points must be used when pouring, so as not to reduce the amount of water to reduce the temperature, affect the slow seedlings. One week after planting, ventilation was generally not carried out in the shed, and the temperature in the shed was raised as much as possible to promote the easing of the watermelon.
Secondly, after the watermelons are slowly growing, in order to increase the translucency, the 4-6 layer membranes can be opened during the day and covered at night. In the early stage of watermelon growth, due to the low temperature, the management is mainly based on heat preservation. Generally, the two membranes and the three membranes do not leave ventilation vents. During the day, 4-6 layers of film are removed and covered at night. This will not affect the temperature of the booth and increase the light transmittance.
Again, the withdrawal of the film should be carried out in several stages. The daytime temperature in the shed is often higher than 32°C, and the ventilation outlet of the small shed can be gradually opened for ventilation and cooling. When the night temperature of the small shed in the shed is maintained above 13°C, the watermelons generally begin to grow. The small sheds can be gradually withdrawn and the arches can be pulled out. When the night temperature in the shed is consolidated at 15°C, the three membranes can be removed. Do not rush to remove the second film, you can open the roll up and pull on both sides of the shed, so as not to meet the cold and cold when the insulation can not meet the requirements of cold injury or frost damage, affecting the growth of watermelon, the two films can generally wait until the middle of April and then removed.
When the watermelon enters the flowering stage, the temperature during the day is getting higher and higher, and the apical membrane ventilation can be pulled. It is best not to let the temperature be higher than 35°C, lest it cause poor flowering and pollination, and can't sit melon. When entering the squashing period, the temperature outside the shed is already high, and the ventilation should be enhanced based on the temperature required by the watermelon.
Autumn garden shed pepper, eggplant, etc.
3-4 film coverage as the weather turns cold, arched greenhouse vegetables into the results later, the amount of the market decreased, the price rose. At this time, it is particularly important to increase the insulation of arch shelters and extend the market time for vegetables. However, in autumn Qiu shed vegetables are not the same as spring oysters, because autumn quinoa vegetables have already reached the late stage of growth, and the plants are tall. When the film is set, it is limited by vegetables. How should it be set?
First, add two films in time. When the external minimum temperature drops to 8°C, two membranes should be installed to enhance the insulation of the greenhouse.
Second, use the convenient conditions to add three membranes to the vegetable mandrel wire. When the minimum temperature in the shed drops to 10°C, a layer of film can be placed on the wire to increase the insulation. As the temperature continues to drop and the growth of vegetables stagnates, the vegetable cultivator can unwind all the vines, bring the plants together, and then cover the plants directly with the film to ensure that the existing vegetables on the plants will not be chilled, extend the storage time, and sell more. Good price.
For the arbors planted with Artemisia halodendron, the setting of the second film and the third film can be consistent with the situation of the film forming of the spring wolfberry vegetables. On the other hand, the small arch of the four membranes can see the width of the dice and select the proper arch to prop up the small arch.
How to manage the vegetables in the autumn sheds and sheds The current autumn quinoa vegetables are mostly on the second membrane, and as the weather turns cold, many vegetable farmers have to prepare three membranes. How do you manage the vegetables in the autumn shed?
First, control the temperature and humidity after adding a multilayer film. For the current vegetables, we must first consider the temperature adjustment work, usually during the day should be controlled at 20-30 °C temperature, night should be controlled at 10-15 °C, temperature control at about 10 °C. The watering of vegetables in the later period must be scientific and reasonable, pay attention to the pouring of small water, avoid flood irrigation, so as to avoid excessive soil moisture, affecting the temperature, causing premature aging.
Secondly, the old leaves and diseased leaves were removed in time to increase the light transmittance and improve the air permeability among the plants. Excessive leaf area coefficient of vegetables can cause crowding between lines, and the light transmission between rows decreases. Therefore, some leaves should be removed in time to increase the transparency of the plants, which is conducive to the growth of vegetables.
Again, ensure the supply of water and fertilizer. Now that the temperature is gradually reduced, vegetable growers can prevent the ground temperature from decreasing after fertilization, affecting the growth of the roots of autumn chilli peppers and generally reducing the number of times of watering and fertilizing, resulting in insufficient supply of water and fertilizer for bell pepper during the fruit expansion period, and slow speed of fruit expansion. In order to prevent the ground temperature from decreasing too much, the vegetable growers can use small water to flush organic fertilizers, such as Apollo 963 rooting roots, roots and more, to meet the nutrients needed for pepper expansion.
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Multilayer membrane in the production of arch shed vegetables
Lifting the shed's multi-membrane coverage is not unfamiliar to the vegetable farmers. It is an important measure to extend the harvest period for arched vegetables in advance. However, during the survey, the reporter found that the form of multi-membrane coverage in various arch sheds is varied and the management methods are also different. It is necessary for vegetable farmers to learn more about this and learn from each other to make better use of this technology.