Culture Of Functional Bag To Control The Temperature

- Oct 10, 2017 -


The diurnal variation of temperature in Functional Bag is similar to that of open field. During the day, when the sunshine is full, if the film is tightly closed, Functional Bag temperature rises rapidly and the rainy days are getting worse. At night, the minimum temperature in Functional Bag is generally 1-3 ° C higher than the outside of Functional Bag. Functional Pa in the ground temperature than the temperature stability, and the temperature showed a high middle, both sides of the low, so Functional Bag middle of the plant tend to grow better than both sides. From the upper and lower part of Functional Bag analysis, during the daytime sunlight, the upper temperature is higher than the lower part, the temperature difference; night or rainy days is the opposite.
Culture Pack is generally covered by three layers, and some also cover the ground. Three layers of cover that is a layer of film, a layer of two films, a layer of small film. Three-layer coverage can generally make the shed than the open air night minimum temperature of about 4.5 ℃. Night shed covered grass curtain, good insulation, but the operation is more labor.
Culture of Functional Bag must take appropriate control measures. In order to make vegetables free from low temperature hazards, during the day must be fully lit, to raise the temperature inside the shed, the night should be strict cold insulation. In the shed temperature is low, the shed must increase the cover. When the cold tide comes, the temperature dropped below 0 ℃, Functional Bag buckle shed, shed covered grass curtain, the lowest temperature at night than not covered by high 2-4 ℃, closed well Functional Bag can be higher than 4-6 ℃ The Ground cover can increase the soil temperature, reduce shed humidity, the use of Qimian spread film, furrow shop straw method, the cost of light, the effect is good.
Vegetables Functional Bag construction is one of the purposes of insulation, but sometimes because of some external factors, which led to lower internal temperature, affecting the growth and development of vegetables, so we will use other ways to improve the indoor heating.
1. When the vegetable Functional Bag external large-scale cooling, you can temporarily use firewood or coal combustion, through the stove, flue and direct cooling to improve the indoor temperature.
2. If conditions permit, you can use wineries, paper mills, smelters and other exclusion of hot air, steam as Functional Bag within the heat source.
3. Increase the organic fertilizer with heat, before planting vegetables, 10-15cm underground buried in the 5-10cm thick semi-decomposed hot organic fertilizer, such as donkey manure, sheep manure and so on.
Improve the indoor temperature of Vegetable Functional Bag, can effectively promote the growth and development of vegetables.
Functional Bag after the end of the basic acceptance of the work is essential, the following we talk about these basic acceptance work.
Acceptance of the basic requirements of the Functional Bag project must first ensure that Functional Bag at normal temperatures to normal operation, to ensure normal work, light transmission rate to reach more than 65%, and all steel structures have to be hot-dip galvanized surface for corrosion Processing; Second, the diameter of less than 8mm standard parts and small parts, you can use the plating process, the coating thickness to 8-15μm; then Functional Bag maintenance structure to meet the watertight requirements, the other row of rainfall should reach 120mm / h; It is worth noting that the use of some parts of the problem, Functional Bag of the main structure of the life of more than 10 years, covering the film life of more than 3 years, covered with grease and float glass life were not less than 10 Year and 15 years
Functional Bag can push some of the soil on the south side of the wall onto the wall and compact the wall with a bulldozer, then cut the inner wall straight. Because the wall with more soil, so the indoor Qimian than the outdoor floor to 30 to 40 cm lower. Semi-underground Qimian Although the south has a little shade, but the indoor Qimian lower than the outdoor, indoor soil temperature will not reduce too fast, can play a better role in insulation.
Functional Bag When the vegetable plant is covered by the ground, the wall becomes the main heating surface. Requirements to increase the thickness of the wall is mainly to increase its heat storage capacity, of course, does not rule out the role of its cold insulation. Among them, whether the thermal insulation has become the key to the success of Functional Bag winter production. Practice to prove that in order to resist the terrible weather in winter, Functional Bag wall width should reach two meters, the width should reach 1.5 meters, was a trapezoidal. If the brick wall, the thickness should be not less than 1.2 meters, that is, within 50 cm for the heat absorption layer, hollow 80 cm, filled with bundles of wheat straw, as the insulation layer, 18 cm as a cold layer. Winter wall should also rely on 30 cm thick corn stalks to enhance Functional Bag insulation performance.

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