In recent years, the development of greenhouses for growing vegetables has become one of the hot topics in the development of high-tech agricultural technology in many regions. Although greenhouse vegetables have many advantages, they will encounter the problem of poisoning vegetables in the production process. Among them, ammonia poisoning occurs most frequently. When the ammonia in the air exceeds the limiting concentration, ammonia gas enters the body through the pores and pores of the vegetable plant, causing young shoots and the most vital top leaves to be the first to be harmed. As the ammonia gas enters the plant body, the reduction takes place. The affected young shoots and young leaves are scorched or water-stained. The light leaves have indeterminate and massive patches, and the leaf edges are burn-like. The plant roots are browned black and lose their function of absorbing water and fertilizer. The above-ground parts gradually wither and die.
The problem of ammonia poisoning in vegetables in greenhouses varies from year to year, especially for those farmers who have just started planting greenhouse vegetables. They are willing to invest in fertilizer. However, due to the lack of practical experience, ammonia poisoning often occurs. Now is the time when the temperature in the shed is gradually warming up. As long as we correctly sum up the lessons learned, pay close attention to the weather and timely monitor the safety status of gas in the shed, this hazard can be prevented.
Pay attention to fertilizer technology. Whenever basal vegetables are applied with basal fertilizer or topdressing, attention should be paid to the following points: First, no matter what kind of fertilizer is applied, the use of base fertilizer is mainly advocated, and top dressing is supplemented; second, organic fertilizer must be used as base fertilizer to fully decompose and promote the application of biological organic. Compound fertilizer as a base fertilizer; Third, whether chemical fertilizers or organic fertilizer can only be deep, can not be spread on the ground, after the application to cover fine soil; Fourth, the base fertilizer or topdressing can not be over-used once, more suitable for a small amount of top dressing. Ammonitoring of ammonium bicarbonate with fertilizer is not recommended. Urea is preferably applied after dissolving water, but the amount per mu should not exceed 50 kg.
Ammonia is often detected. Always check the gas condition in the greenhouse. You can use the pH test paper sold by the pharmaceutical company to measure the pH value of the water droplets in the film. When the PH is above 8.2, you must exhaust the air in time. If it is a little slow, poisoning will occur.
Lightly injured and timely rescue. When mild symptoms of ammonia poisoning have occurred in vegetables in greenhouses, in addition to venting and exhausting, a quick water injection is required to reduce the concentration of fertilizer solution in the soil; secondly, active liquids such as Huimanfeng, Zhuangfuxing and Gaomei Shi are sprayed on the roots. The concentration is 1:500-800 times, which can better balance the acidity and alkalinity of the plant body and the soil solution. Thirdly, 1% edible vinegar can be sprayed on the back of the plant leaves, which can reduce or alleviate the harm. Therefore, install an ammonia alarm to prevent accidents.
The problem of ammonia poisoning in vegetables in greenhouses varies from year to year, especially for those farmers who have just started planting greenhouse vegetables. They are willing to invest in fertilizer. However, due to the lack of practical experience, ammonia poisoning often occurs. Now is the time when the temperature in the shed is gradually warming up. As long as we correctly sum up the lessons learned, pay close attention to the weather and timely monitor the safety status of gas in the shed, this hazard can be prevented.
Pay attention to fertilizer technology. Whenever basal vegetables are applied with basal fertilizer or topdressing, attention should be paid to the following points: First, no matter what kind of fertilizer is applied, the use of base fertilizer is mainly advocated, and top dressing is supplemented; second, organic fertilizer must be used as base fertilizer to fully decompose and promote the application of biological organic. Compound fertilizer as a base fertilizer; Third, whether chemical fertilizers or organic fertilizer can only be deep, can not be spread on the ground, after the application to cover fine soil; Fourth, the base fertilizer or topdressing can not be over-used once, more suitable for a small amount of top dressing. Ammonitoring of ammonium bicarbonate with fertilizer is not recommended. Urea is preferably applied after dissolving water, but the amount per mu should not exceed 50 kg.
Ammonia is often detected. Always check the gas condition in the greenhouse. You can use the pH test paper sold by the pharmaceutical company to measure the pH value of the water droplets in the film. When the PH is above 8.2, you must exhaust the air in time. If it is a little slow, poisoning will occur.
Lightly injured and timely rescue. When mild symptoms of ammonia poisoning have occurred in vegetables in greenhouses, in addition to venting and exhausting, a quick water injection is required to reduce the concentration of fertilizer solution in the soil; secondly, active liquids such as Huimanfeng, Zhuangfuxing and Gaomei Shi are sprayed on the roots. The concentration is 1:500-800 times, which can better balance the acidity and alkalinity of the plant body and the soil solution. Thirdly, 1% edible vinegar can be sprayed on the back of the plant leaves, which can reduce or alleviate the harm. Therefore, install an ammonia alarm to prevent accidents.
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