Second, increase temperature and light, promote growth

As the outside temperature decreases, the temperature in the shed gradually decreases, especially when the soil temperature is low, which will cause the crop root system to be blocked, the absorption capacity will be deteriorated, and the plant's stress resistance will also be deteriorated. Therefore, the daily management must do a good job of heat preservation, and if necessary, measures must be taken to increase the temperature and supplement light to ensure the healthy growth of the crop.

1. Multi-layer insulation

When the outside air temperature is low, multi-layer covering can be adopted for thermal insulation. Greenhouses are generally covered with three layers, and some require ground coverage. Three layers of cover are a layer of shed film, a layer of two films, and a layer of small shed film. Three-layer covering can generally make the shed about 4.5 ° C higher than the lowest temperature at night in the open field. The small shed is covered with a straw curtain at night, which has good thermal insulation properties, but the operation is more labor-intensive. Ground coverage can increase soil temperature and reduce humidity in the shed. The method of laying mulch on the ground surface and laying straw on the ditch is small in cost and good in effect.

2. Add wall insulation layer

Specific method: use ordinary agricultural film or old film, cut to a length of about 3 meters, film length = greenhouse length + gable length, then heat the two ends of the film with an iron, and bond them into a 10 cm slit tube, each Insert a 3-meter-long wooden stick, pull it apart, and tightly cover the back wall and gable. The lower ends of the wooden sticks are pierced into the ground soil, the depth of the soil is more than 30 centimeters, the upper ends are wound with iron wires, fixed at the outer edge of the gable wall, and the bottom edge of the film is buried in the soil outside the wall. Then, the gap between the wall and the film is filled with crushed grass, about 30 cm thick, and the upper edge of the film is buried on the back slope of the greenhouse with soil. With this method, the wall heat is no longer radiated outward, and the night temperature in the greenhouse is significantly increased, which has a significant effect on stabilizing the night temperature during the severe cold period.

3. Use straw bioreactor to increase temperature

Dig a trench with a width of 60 to 70 cm and a depth of 25 to 30 cm according to the size of the cted hoe. Fill the straw with a special microbial inoculum. The straw is covered with about 20 cm of soil and irrigated until the straw can be irrigated. Straw can gradually decompose under the action of microorganisms, and release heat and carbon dioxide. This measure can increase the temperature of the root layer soil by about 2 ° C, improve the physical structure of the soil and the ecological environment, and supplement carbon dioxide for crops.

4. Ignition temperature increase

If a severe cold current strikes and the indoor night temperature is lower than 6 ℃, the ignition temperature needs to be increased. The method is to ignite the biogas in the facility. A biogas stove is set up every 60 meters in the greenhouse. If there is no biogas equipment, several briquette furnaces can be placed in the shed. But pay attention to prevent carbon dioxide poisoning, the greenhouse should be ventilated before entering. Do not ignite wood chips and bran in the shed to increase the temperature. Ignite these substances in the closed environment of the shed. It is very easy to produce toxic gases such as carbon monoxide and cause safety accidents. If conditions permit, you can also use electric heating lines, boilers, or ground source heat pumps for heating, but generally only modern facilities or nursery greenhouses will be used.

5. Application of temperature increase and fertilizer increase combustion block

The temperature increase fertilizer increase combustion block is a new product used to increase the temperature and carbon dioxide concentration in the shed. Easy to use and effective, each greenhouse costs 18 ~ 30 yuan per day.

Instructions:

Greenhouses or greenhouses use 6-9 blocks per acre, or 1 block per 300 cubic meters of shed space, divided into 3 ~ 4 places to light. Ignite 1 to 2 hours before pulling the grasshopper in the early morning, each piece can burn for about 50 minutes. When in use, draw a match and place it on the vent of the burning block. The burning block can be ignited by burning the sealing wax. The matching screen is placed on two standing bricks. The combustion block is placed on the screen, and the combustion block is covered with a matching suction cylinder, which is beneficial to the combustion and increases the heat.

Precautions:

Do not lay it flat on the ground, ignite it on the aisle walkway, and keep away from flammable materials such as shed film. During continuous use, the shed must be ventilated to prevent the indoor carbon dioxide concentration from causing high hazards. After lighting, people try not to enter the shed. The greenhouse for fruit ction should be banned during the flowering period, and the amount of the greenhouse for tomato ction should be reduced to prevent scorching the leaves.

6. Yuba heating

It is also possible to install a light bulb for heating the bathroom above the crop in the shed, and use the thermal energy of the bulb to increase the temperature in the shed. Generally, 10 ~ 15 Yuba bulbs with a power of 275W are installed in each greenhouse, which can increase the indoor temperature by 2 ~ 4 ° C. The suspension height is 1.5 ~ 2 meters from the ground. It is turned on every morning and morning, and at night when the indoor temperature does not meet the growth requirements. Pay attention to the use of waterproof light sockets, and also consider the power load to avoid accidents.

7. Apply fill light

When it is cloudy or rainy or snowy, if there is insufficient light in the shed, you can also install fill light. Under the condition of sufficient light, the general melon and fruit vegetables can increase the yield by 20% ~ 30%, and the leafy vegetables can increase the yield by 30% ~ 50%. The effective lighting radius of each lamp is about 2 meters, the hanging height is 1.5 ~ 2 meters from the ground, and more than 1 meter from the crop growth point; the distance between each lamp of melons and fruit crops such as tomatoes and cucumbers is about 3 meters. Leafy vegetables The spacing is about 4 meters. It is necessary to use a waterproof light port, and a timer can be installed under conditions to accurately control the switching time. Fill up the light all day on cloudy days, and fill up the grass for 3 to 4 hours on sunny days to ensure that the daily light time is about 10 hours.

Zhengzhou Delong Chemical CO., Ltd. is the production base of plant growth regulators in China, which established in 2009, specializing in offering plant protection products. If you have any question, contact us any time.