Spring greenhouse cultivation of zucchini has entered the middle and late period, and spring is a season of climate change. The high temperature, the cold that has not been removed, and how to increase the yield will bring new problems to spring cultivation. 1. High temperature effects and countermeasures: As the temperature rises, the growth and development of vegetables will be greatly affected, so the following countermeasures should be taken. Shading and cooling: When the wind is not obvious, the straw film or shade net should be covered on the shed film to control the temperature rise in the shed. Timely windproof: By adjusting the size of the vents and the length of the venting time, the temperature of the shed is regulated, and the cold wind "flashing seedlings" is taken into consideration during the venting process. Appropriate watering: The purpose of watering is mainly to increase the relative temperature in the soil and air, reduce the high temperature hazard, and find that the soil is droughted and watered in time. 2. High-humidity effects and countermeasures: Since the internal environment of the solar greenhouse and the greenhouse is relatively closed, excessive watering or temperature drop often causes high humidity, and the following countermeasures should be taken. Floor Cover: When there is too much rain in spring, cover the ground with an old film to prevent excessive rain from seeping into the ground. Determine the number of watering and the amount of watering each time: generally pouring small water or grooved water, not flooding, in the sunny day 10 to 12 o'clock, it is best to avoid cloudy after pouring. Release the wind: When releasing the wind, pay attention to the wind at the noon when you put the top air outlet to avoid premature release. In the high temperature and high humidity environment, it is easy to produce pests and diseases. Dust or fumigant should be used to control pests and diseases. No drop film is used. 3. Loss of carbon dioxide: The zucchini planted in the greenhouse will undergo photosynthesis after sunrise and consume a large amount of carbon dioxide, so that the carbon dioxide gas in the closed greenhouse is deficient. In order to make photosynthesis work normally, carbon dioxide is needed. At present, there are mainly three methods. The application of farmyard manure will enable a large amount of farmyard manure to release carbon dioxide during microbial decomposition to increase the concentration of carbon dioxide in the facility. In the case of not significantly affecting the indoor temperature, a short period of small ventilation is performed, so that the natural carbon dioxide is replenished into the room, but the time cannot be too long, so as not to lower the temperature and hinder the growth. Manual application of carbon dioxide. From the point of view of production, the easiest and most convenient method is to use chemical reaction of ammonium bicarbonate with sulfuric acid to form carbon dioxide gas and ammonium sulfate. The specific method is: placing a container in the middle of every 20 square meters of the room, lined with a plastic film, and put 1 to 1.2 kg of sulfuric acid diluted 4 times. At about 8:00 am every day, about 100g of ammonium bicarbonate is added to dilute sulfuric acid. When the sulfuric acid is exhausted and only ammonium sulfate is left in the container, it can be removed as a fertilizer, and then repeated, in the process, in order to To maximize the benefits of carbon dioxide, it must be matched with suitable conditions such as temperature, light, moisture and fertilizer. At the same time, since the carbon dioxide gas has a large specific gravity, is not easy to flow, and is easy to sink, the container for generating carbon dioxide should be hung on the upper part of the zucchini, so that the carbon dioxide gas in the room can be evenly distributed, and the gas fertilizer can be applied. 4. Countermeasures for severe weather Even cloudy days: insufficient sunlight in the shed, ground temperature and temperature are significantly reduced, humidity is high, plant photosynthesis is weakened, root activity is poor, and plants are in a state of water scarcity. Should promptly reveal the grass curtain to see the light, not watering, you can artificially fill the light. Rainy day disaster: rainwater can be wetted to build the back wall, causing it to collapse, soaking the straw curtain, causing the scaffolding load to increase, causing the scaffolding to break. The following countermeasures should be taken. Before the rain, the grass curtain, the back slope and the back wall Cover the plastic film or roll the curtain in time to avoid the rain. After the rainy days, the weather suddenly increased: the light suddenly increased, the temperature of the shed suddenly increased, and the transpiration of the leaves strengthened, which easily caused the plants to dehydrate and die. The following countermeasures should be taken. Some grass curtains should be uncovered every day to see the light. After the sudden clearing, all the light is weakened during the day. When the light is strong, some straw curtains should be laid down and released in turn to make the plants gradually. adapt.
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1. Solar panel: The solar panel is an important part of the mobile phone software of the solar power generation system, and also a part of the practical value of the mobile phone software of the solar power generation system. Its function is to convert the professional ability of radioactive substances in natural light into electric energy, or send them to storage batteries, or promote load work.
2. Solar controller: The solar controller is used to control the operation of mobile phone software in all systems, and has the functions of overcharge protection and overcharge maintenance for the battery. In areas with large temperature difference, the qualified controller shall also have the function of temperature compensation. In the mobile phone software of the solar road lamp system, there must be light control switch and time control solar road lamp operation.
3. Battery: generally valve controlled maintenance free lead-acid battery. In the mobile phone software of small and medium-sized systems, in cold weather areas, a solar gel battery needs to be configured, which can be used at low temperatures, with high efficiency and is not vulnerable to major damage. Its function is to store the electric energy of the solar panel when the sun shines, and then release it under certain conditions.
4. Variable frequency power supply: split wave type and sine wave type. In order to provide power for 220VAC electrical products, it is necessary to convert the DC stabilized voltage power supply in the solar power generation system software into AC circuit energy, so DC AC variable frequency power supply is required.