With the arrival of high temperature, many farmers with occupational diseases come to see a doctor every day, and their symptoms are basically the same, dizziness, shortness of breath, weak limbs, and coughing
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One of the villagers surnamed Hu told the doctor that he had two vegetable greenhouses at home, and just 3 days ago, he began to feel dizzy and uncomfortable all day long , I thought it was just a common cold, but after taking a lot of medicine, it didn’t work. Through his description, the doctor finally concluded that this is a kind of plastic shed disease.
Plastic shed disease? Working in a plastic greenhouse can also cause such serious harm to the body! But plastic greenhouses have long been one of the tools commonly used by farmers. Should we continue to use them? What kind of harm will it cause to the body if you work in a greenhouse for a long time?
First of all, let’s start with the origin of the structure of plastic greenhouses.
Ending the old era of China, since the founding of New China, in order to meet the gradual improvement of the quality of life of people of all ethnic groups, the first thing to be solved is food and clothing Question. The issue of food and clothing once became a thorny issue since the development of New China. In the face of the basic conditions of a large population and the unfavorable factors of the soil after the war for growing food, the government has developed ideas and strategies. agriculture.
In the early days of the founding of New China, the supply of seasonal vegetables was basically satisfactory. You can only rely on cabbage for a whole winter. Inability to take in more nutrients in vegetables for a long time will lead to the appearance of various diseases in the body, not to mention the body will collapse when only eating cabbage. The hardships of the people at that time were unimaginable.
How to grow off-season vegetables has become an urgent problem to be solved.
The first solution wasZhao Hongjun. Zhao Hongjun, born in 1937. In 1953, he attended the Agricultural School Affiliated to Shanxi Agricultural College. By chance, he used old plastic packaging to cover vegetable fields and found that the ground temperature could be increased by 1-9 degrees Celsius, which also became the beginning of his research on film agriculture.
And it was this coincidence that created a precedent for plastic greenhouses since the founding of New China. Zhao HongjunThis discovery, later known as the “Taigu mulch”, this discovery It is earlier than the mulching research carried out in Hawaii, USA, which is equivalent to the first discovery ahead of the world. This also makes him one of the earliest researchers in China and the world to cover cultivated crops with plastic film.
Zhao Hongjun started related research after he accidentally discovered it, and gradually devoted himself to the development of modern agriculture in China. In 1964, he proposed to the Ministry of Agriculture about 17 agricultural and animal husbandry applications, such as plastic film mulching, small arch shed mulching, greenhouse mulching, and film in cold protection of chicken houses and canal anti-seepage, and attached his Drawings of the designed one-sided slope and cantilevered bamboo and wood structure greenhouses.
Zhao Hongjun’s design is supported by various ministries and commissions of the State Council.The Jinyang-type plastic greenhouse is more efficient than the 17 types of greenhouses of the same type that save the most steel in Japan. Also save . Unfortunately, at that time, China had not applied for a patent. Otherwise, the use of plastic film in agricultural technology will be mastered by my country as the world’s first technology. After experimental verification, crops under plastic greenhouses will indeed extend the season, allowing more people to eat fresh vegetables.
So, Zhao Hongjun began to promote his research and development technology – plastic greenhouse strong>. heAnd 29 provinces and cities across the country, training more than 5 million people. Plastic greenhouse technology has caused a stir throughout the country, and more and more farmers have entered the era of technological change.
Since the 1990s, plastic greenhouses have rapidly developed from the suburbs to the fields, from the north to the south, and even to Qinghai and Tibet with an altitude of more than 5,000 meters. According to the calculation of eating 0.5 yuan of greenhouse vegetables every day in the northern winter, the economic value of plastic greenhouses is more than 100 million yuan.
Having talked so much about the development of plastic greenhouse technology and its economic value, we must admit that plastic greenhouse technology has indeed created a glorious history in China’s agricultural history , but on the other hand, we also need to correctly understand that working in a plastic greenhouse for a long time will be harmful to the body.
In addition to the cases mentioned at the beginning, on February 24, 2022, an elderly man in Hangzhou suddenly came to work in a greenhouse. Fainting, after being discovered, urgently dialed 120 for help, which aroused public opinion in the society.
Nowadays, more and more workers working on the front line of the greenhouse are suffering from various diseases. Many living examples illustrate the harm of plastic greenhouses. Let us analyze , why is working in a greenhouse harmful to the body?
The structure of the plastic greenhouse that started to rise at the beginning is actually very simple, that is, it consists of three walls and a curved plastic greenhouse. One of the walls is rectangular, the other two walls are quarter-circles, and the plastic sheds that act as closures ride on top of the three walls. Most of the sheds are made of bamboo poles and covered with a plastic layer. This simple structure constitutes a plastic greenhouse.
The cost of plastic greenhouses is not high. In order to increase their income, farmers have to work in plastic greenhouses for a long time, and long-term work increases the risk of physical illness. risk. The reasons for the specific hazards are summarized in the following three points.
First of allWe analyze the working principle of plastic greenhouses: the reason why plastic greenhouses can make crops better It grows on the ground because it provides a suitable growth environment, suitable temperature and humidity for crops. As a result, the plastic greenhouse needs a large area of direct sunlight, and the personnel working inside must be exposed to direct sunlight for a long time. Although the sun is good for the body, But considering the summer, that It’s simply exposure to the sun, which is not good for the body.
In summer, not only is it exposed to the sun, but also the harm of the UV index soaring. Obviously, this is very unhealthy for the body. As for winter, it will cause the risk of excessive indoor and outdoor temperature difference. The indoor temperature is above zero and the outdoor temperature is below zero. If workers frequently enter and leave the greenhouse, they will increase the risk of colds and colds.
Just to control the temperature will bring so many harms. You must know that the greenhouse not only needs to control the temperature, but also needControl humidity. Humidity control will not cause much harm to workers in spring and autumn, but in summer and winter, it is another picture. In the extremely high temperature in summer, it is necessary to control the humidity, and it is necessary to irrigate the crops in time, but the high temperature will speed up the evaporation of water, which makes the humidity in the greenhouse increase instantly.
Because of this,
span>After the workers who entered the greenhouse in the summer came out, their clothes were already soaked with sweat. And the clothes were not only sweaty, but also exposed to the high temperature. Evaporated water vapor. Working in such an environment for a long time, the body will be invaded by a large amount of moisture, which will eventually cause rheumatism. In winter, it will encounter the double blow of dampness and cold, and the body cannot bear it. p>
Secondly, we will analyze from the sealing of plastic greenhouses: as a working environment in a greenhouse, it must be closed The result of this closed environment is that the air permeability is extremely poor.During the day, crops can perform photosynthesis and Oxygen is released and energy is produced, but at night the crops can only respire and produce carbon dioxide.
The closedness of the plastic greenhouse also means that the air flow is poor, and in a closed environment, labor The author needs to spray relevant pesticides on crops to eliminate pests, which means that the volatilization of pesticides is also in this closed environment. In this way, the human body is more susceptible to The absorption of pesticides is very harmful to health. Imagine, absorbing toxins in an oxygen-deprived environment, which is bound to debilitate the body.
FinallyWe analyze the working habits of laborers in plastic greenhouses: labor In order to make full use of the space in the plastic greenhouse, the crops to be planted are also densely distributed. There is no spaced planting at all. There are chemical fertilizer raw materials, and the vegetables are also changed every season. This results in workers need to squat for a long time to work, squatting when checking the growth status of crops, squatting when supporting crops , even squatting when harvesting fruit.
Squatting for a long time will aggravate the knee injury, and the knee will be unbearable. Many real cases are rheumatism of the knee and necrosis of the femoral head. This working mode is obviously a great impact on the body. Without the protection of the knees, the high-intensity work again and again makes it difficult for the workers to stand upright after harvesting ripe vegetables.
Although plastic greenhouses will increase the output of off-season vegetables, we can conclude from the above analysis that the environment in the greenhouses is not suitable for laborers to work for a long time. Now researchers are constantly innovating on greenhouses, and the development of greenhouses is becoming more and more artificial intelligence. It is no longer necessary for laborers to spend time and energy to complete the planting of crops in the case of physical damage.
There are also various new types of greenhouses on the market.
such asnew glass greenhouses, which are mostly used in modern agricultural technology Display, nursery, sightseeing; New multi-span greenhouse, this kind of greenhouse is mostly used for vegetable and flower production and cultivation. It is divided into double-film multi-span and single-storey multi-span; Insulation effect preference.
The advancement of technology will inevitably bring about more efficient returns. What we hope is that the advancement of technology can help more workers, so that they can work for us while ensuring their health. Bring more quality vegetables.
Author: reai Initial review: Xu Moyuan Proofreading editor: Xiao Wan