Plastic greenhouses to cultivate vegetables, often due to improper fertilization methods, neglect of ventilation, so that excessive toxic gas inside the shed, endanger the vegetables, but often misdiagnosed as a disease, resulting in deficit or even no income. One, hazard: 1, nitrogen due to the application of excessive amounts of urea, barium sulfate and other available fertilizers, or improper fertilization methods, such as the use of organic fertilizer without decomposition, there is a greenhouse gas decomposition under high temperature conditions, it will damage the vegetables, so that the edge of the tissue appears Water spots, severe wilting of whole leaves. Often misdiagnosed as frost or other diseases, cucumbers, tomatoes, zucchini, etc. are sensitive to ammonia. The use of nitrous acid at one time for excessive application of ammonium nitrogen fertilizer can reduce the effect of certain bacteria and cause local acidity of the soil. When the PH value is less than 5, it will produce nitrous acid gas, can cause white spots on the leaves of vegetables, and the whole leaf becomes white and dead. It is often misdiagnosed as powdery mildew. Vegetables sensitive to nitrous acid are eggplant, cucumber, zucchini, and celery. , pepper and so on. 3. Ethylene and chlorine If the quality of the agricultural film or plastic film is bad, or there is residual plastic film in the ground, it is exposed to sunlight. Under high temperature conditions in the greenhouse, volatile gases such as ethylene and chlorine are easily generated. When the concentration reaches a certain level, yellowing between the leaf edges or veins of the vegetables can occur, which in turn turns white. In severe cases, the entire plant withers. Often misdiagnosed as bacterial keratoses, the damage to cucumber is particularly severe. In addition, when heating is warmed in winter, if the fuel is not fully burned, toxic gases will be produced. If the ventilation is not timely, excessive carbon dioxide will be accumulated. Affects vegetable production. Second, prevention: 1, a reasonable fertilization. The organic fertilizer applied in the greenhouse must be fermented and rotted, the fertilizer must be of high quality, and the urea should be mixed with phosphorus and calcium. Basal fertilizer should be applied 20 centimeters deep, and the depth of topdressing chemical fertilizer should reach about 12 centimeters. 2, ventilation. In sunny and warm weather, ventilation should be performed in conjunction with adjusting the temperature, and ventilation and air exchange should be performed in rain and snow. 3, the use of safe and non-toxic agricultural film and plastic film, timely removal of waste plastics and their residues in the shed. Regular Pasta & Traditional Noodles
Hebei Abiding Co.Ltd, a professional food supplier, was established in 2005 in Shijiazhuang, China. We specialize ourselves in supplying Organic Tomato Paste and Organic Pasta. Conventional ones are also available to supply. We can make the private labels according to the customers' requirement. Our products have EU, NOP and JAS organic certificates. They are also Kosher certified. We have business relationships with importers and wholesalers from around the world, mainly in Europe and America. Over the years, we have earned highly recognition from clients due to our qualified service and steadily increase our market share year after year.
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