Lighting control technology:
1. Do a good job of planting. Timely pruning, hiccups, vines, old leaves and other field management are conducive to ventilation in the shed. Use drop-free film. The use of a drip-free membrane shed can increase the light intensity in the shed and increase the temperature of the shed.
2. Reasonably uncover the straw curtain. Under the premise of doing insulation work, through the record value of temperature and humidity three-parameter recorder and combined with appropriate experience to promptly remove the straw curtain used for heat preservation and delay cover curtain, generally the sun will appear after 0.5 to 1 h, and the sun will fall in the first half Hours cover the curtain again. Especially in the rainy days when it rains, it is necessary to properly uncover the sun's scattered light.
3. Transplant the same kind of vegetables, and strive to make the seedlings of the same size, so that the plants grow neatly and reduce shading between the plants. At the same time, it is better to do planting in the north and south to make it as sunny as possible.
Air humidity adjustment:
1. Cover the drip-free membrane; irrigate the soil in the shed, use the plastic hose under the mulch to spray irrigation, and use drip irrigation facilities if necessary.
2. Timely tillage loose soil after watering. Use large and small rows as much as possible. The temperature and humidity light three-parameter recorder was used to record changes at any time.
4. Minimize the watering during the growth period, prevent the watering of the growing season from lowering the ground temperature, increase the air humidity, and if watering is needed during the growth period, open the ditch to fill the small water and avoid flooding.
Temperature technology regulation:
In summer, the temperature in the shed is very high, and all the vents around the greenhouse must be opened. If the temperature is too high, the top of the greenhouse can cover the shade net to cool down. In sunny days during the day, we must promptly do a good job of measuring the air temperature inside the shed, adjust the ventilation openings, and try to keep the air temperature in the shed stable at 25 to 30°C by measuring the time of the three-parameter temperature and humidity light recorder.
The role of the above three technologies in the control of vegetable cultivation in greenhouses can be imagined to be critical to the growth of crops. Only continuous improvement and application of enhanced technologies can make greenhouse vegetable cultivation more perfect and achieve a large area of ​​vegetable crops. High-yield production will be more convenient. Of course, control of the three parameters is inseparable from the real-time monitoring of the temperature and humidity light three-parameter recorders, and the timely and scientific reflection of data information.
The adjustment and control of temperature, humidity, and light intensity is a core work in the cultivation of greenhouses. The control of the three has a greater influence on the growth and development of plants such as photosynthesis and respiration. At the same time, doing a good job in the three-parameter technology control can better improve the growth of crops and increase the amount of products, provide a certain basis for the rational use of resources, such as the use of irrigation water and the provision of artificial lighting and so on. The application of the three-parameter temperature and humidity recorder in these technologies is described below.