1. Ammonia. Ammonia is a harmful gas that often occurs in strawberry cultivation. Mainly from the chicken manure without compost, pig manure, horse manure, cake fat and so on. In a closed greenhouse, these organic fertilizers produce large amounts of ammonia by high-temperature fermentation. In addition, the excessive application of ammonia carbonate and surface application of urea can also produce large amounts of ammonia. When the ammonia content of the greenhouse reaches a certain level, it will produce raspberries on strawberries. Ammonia invades through strawberry stomata, first damaging young tissues, such as flowers, fruits, young leaf margins and other victim tissue first brown, after the white, severe wilting withered. The ammonia poisoning and high-temperature hazards are often mixed in production, and attention should be paid to the difference. Check whether there is accumulation of ammonia in the shed, pH test paper method can be used, that is, in the morning sunrise before the release of the wind, with pH test paper on the shed film on the pH of water. Normally, the water droplets in the film are neutral, and if the reaction is alkaline, ammonia gas accumulates. Control measures: The organic fertilizer used in the shed shall be fully decomposed; as little or no ammonium bicarbonate should be applied as possible, and urea should be applied with furrows or holes; under the condition of ensuring the temperature, the ventilation openings shall be opened in time to ventilate and ventilate. .
2. Nitric acid gas. The nitrous acid gas mainly comes from unreasonable fertilization. In the soil, especially the soil with large sand, a large number of nitrogen fertilizers such as ammonium nitrate are continuously applied, and the conversion process of nitrous acid to nitric acid is hindered, but the conversion of ammonium to nitrous acid is impeded. But it can be carried out normally. This leads to the accumulation of large amounts of nitrous acid in the soil and the production of nitric acid gas after volatilization. Poisoning occurs in about one month after fertilization. The nitrous acid gas invades the mesophyll tissue through the stomata of the leaf, which firstly damages the cells near the stomata, and then spreads to the spongy tissue and the palisade tissue, causing the chloroplast structure to be destroyed and fade, and gray spots appear. If the concentration is too high, the veins turn white. For the detection of nitrous acid gas, pH test paper can also be used. Contrary to ammonia gas, if the pH value of the water droplets of the greenhouse membrane is acidic, it indicates the accumulation of nitric acid gas. Control measures: First, when topdressing nitrogen fertilizers, they must be applied in batches and in batches according to the principle of “a small number of times†and mixed with the soil. After the application, the water shall be timely covered with water. Second, ventilation and ventilation are often used in the management of the greenhouses. The third is the amount of lime applied to the soil, and generally about 100 grams of Mushi.
3. Carbon monoxide and sulfur dioxide. These two kinds of gases are mainly caused by insufficient combustion of fuel or poor fuel quality during the heating process, which is a frequent occurrence of harmful gases in greenhouses. In addition, organic fertilizers such as people, animals, feces, and oil cakes, which have not been cooked, can also be used to release sulfur dioxide during decomposition and fermentation. Sulfur dioxide is harmful to functional leaves first, and old leaves and new leaves are lighter after being damaged. The symptom of the victim is to first appear spots in the places where the leaves have many pores, and then fade. When the concentration is high, the whole leaves are like hot water. In addition, when the humidity in the air in the shed is high, the sulfur dioxide will be in contact with water to form sulfurous acid, which will fall on the leaves and can directly damage the chloroplast and cause damage to the leaves. To prevent the production of carbon monoxide and sulfur dioxide gas in the shed, in addition to the application of adequately decomposed organic fertilizer and frequent ventilation, the greenhouse should also be selected with high quality fuel, and the combustion should be complete, try not to use direct heating stove heating, stove The flue should be wiped tightly so that no smoke or cigarettes are left.
4. Ethylene and chlorine. These two gases are mainly derived from polyvinyl chloride film. When the temperature in the greenhouse exceeds 30°C, polyvinyl chloride film will volatilize ethylene and chlorine. Ethylene is mainly to accelerate the aging of strawberries. Chlorine can make the leaves of strawberry yellow, white and wilting. Control measures: try to use a safe, reliable, low-temperature, anti-aging special greenhouse membrane; to strictly control the greenhouse temperature below 30 °C; if you find that greenhouse ethylene ethylene or chlorine harm, should immediately replace the film, if it can not be replaced, Ventilation openings should be opened during the day to increase ventilation; in the shed interior, old shed membranes and plastic products should be avoided to prevent harmful gases from escaping at high temperatures.
Electric Hydraulic Operating Table
1. Import hydraulic system
2. Memory sponge mattress
3. Electric Longitudinal displacement ≥350mm
4. Tabletop is X-ray available
5. Optional Carbon fiber bed panel
The Hydraulic system adopts imported integrated type components, imported motor and solenoid valve, stable performance.
The Operating Table uses wired mini touch controller.
Pillar base cover all 304 stainless steel, anticorrosion, easy to clean and durable.
Taiwan stainless steel structure, easy to use, safe and stable.
Accessories are removable.
The Multi function medical operating table is suitable for comprehensive surgical operations like thoracic surgery, abdominal surgery, brain
surgery, eye surgery, ENT, gynaecology and obstetrics, urology surgery, orthopedics surgery and other general purpose.
More Images:
The brief medical operating table without accessories installed on
The whole set Surgical Operation Table with all related Accessories intalled on
Certificates:
Certificates of CE, ISO9001, ISO13485 and CFDA are approved
Company:
Shangdong province is the main machinery production base in China.
KANGERJIAN Medical Technology Co., Ltd. is a group of senior lighting design expert and machinery manufacturing expert company with 20years experience and factory locating in the east city--the hometown of confucius--Qufu in Shandong province, China.
The Company has passed the ISO:9001:2008 quality system certification, ISO13485:2003 quality system certification, CE certification and CFDA certification, so that the enterprise management standards and product quality is relatively connected to expand the international market for enterprises to lay the foundation.
Our main products: Operation Theatre Lights , Operating Room Lights , Double Dome Halogen Operating Light, Single Dome Halogen Operating Light, LED Operating Light , Surgical Operating LED Light , Mobile Type Operating Light , Gynecology Examination Tables , Obstetric Delivery Bed , Electrical Gynecological Table , Obstetric Delivery Table , Delivery Examination Table , Electric Hydraulic Operating Table, Electric Medical Operating Table, Manual Electric Operating Table , Surgical Table , Operating Table, Operating Theatre Pendants , icu tower crane in ICU room, LED Viewbox etc. professional medical equipment.
The quality of casting by me, the market led by me! Excellent from professional, KANGERJIAN people lead the new trend of medical equipment.
Electric Hydraulic Operating Table
Electric Hydraulic Operating Table,Electric Hydraulic Operating Bed,Hospital Electric Hydraulic Medical Table,Hydraulic Pressure Operation Bed
Shandong Kang'erjian Medical Technology Ltd. , https://www.operatingtable.nl