The food is not to say that the fresher the better, and in the beginning of the summer, some fresh foods must be avoided. The following Xiaobian recommends five kinds of fresh foods that are not suitable for starting Xia health. 1, fresh sea bream Fresh sea bream contains more water, thicker skin and toxins. Only after washing with salt and adding alum salt (commonly known as Sancha) twice, the fresh sea bream is dehydrated twice before the toxins are drained. The two sea otters are light red or light yellow, uniform in thickness and tough, and they are squeezed to squeeze water. This type of jellyfish is edible. When people travel to Haishu producing areas, they will encounter sea otters that have not been treated or treated with only 1-2 times of salting. Do not try or buy them. 2, fresh yellow daylily Also known as day lily, fresh unprocessed products contain colchicine. Colchicine itself is non-toxic, but it oxidizes into highly toxic three colchicine in the body after eating. Experiments show that as long as eating 3 mg colchicine is enough to make people nausea, vomiting, headache, abdominal pain. If you eat more, you may have hematuria or blood in the stool, 20 mg can cause death. Dried lily is cooked and colchicine is dissolved, so it is non-toxic. 3, fresh fungus It contains a light-sensitive substance called porphyrin. If it is eaten by the sun, it can cause skin itching, edema, and can cause severe skin necrosis. If edema occurs in the throat mucosa, breathing difficulties may occur. Dried fungus is the finished product after exposure. It will decompose most of the porphyrins during the exposure process, and it will be soaked in water before consumption. The remaining toxin contained in the dried fungus will dissolve in water, making the water-fed fungus non-toxic. 4, pickles Fresh vegetables contain a certain amount of non-toxic nitrate, which is reduced to toxic nitrite during salting. Under normal circumstances, nitrite began to increase significantly after 4 hours of salting, peaked at 14-20 days, and then gradually decreased. Therefore, either eat salted pickles within 4 hours. Otherwise it should eat pickled more than 30 days. Nitrite can cause symptoms of hypoxia, such as facial bruising, and it can combine with secondary amines in foods to form carcinogenic nitrosamines. 5, bottled water Bottled water sold on the market, whether it is distilled water, mineral water, or other pure water, most of the ozone is used for final disinfection prior to barrel filling, so it will contain higher concentrations in freshly filled bottled water. ozone. For humans, ozone is a toxic substance. If you drink fresh bottled water, you will undoubtedly take poison into your body. If you put these bottled water for 1-2 days, ozone will disappear naturally. According to the regulations, the bottled water produced must pass the inspection before it can leave the factory, and this process takes 48 hours. Therefore, it is safe to check the bottled water delivered according to the specifications. Greenhouse Drip Irrigation System Fertigation is using your irrigator to fertilise the plants and soils as you water, which is the most efficient and advanced practice of fertilization. Aid of pressure system (or natural divide terrain), the soluble solid or liquid fertilizer, according to the soil nutrient content and crop fertilizer regularity and characteristics of species, with the fat of with irrigation water, through a controlled water supply pipeline system, supplying, the compatibility, water through the pipe and drop head form drip irrigation, uniform, regular, quantitative, infiltration area crop root growth and development, make the main root soil always stay loose and appropriate moisture content, at the same time according to different crop fertilizer characteristics, environment and soil nutrient content in soil; Crops in different growth phase water requirement, the different development stages of the fertilizer rule is the demand of design, the water and nutrient timing quantitative, provided directly in proportion to the crops. Greenhouse Drip Irrigation System,Greenhouse Micro Irrigation System ,Plant Drip Irrigation JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.alibabagreenhouse.com