Rainy days, vegetable yellow leaves should pay attention
First, there are more cloudy days. More cloudy days, lower temperatures lead to vegetable root injury, affecting the absorption of nutrients, showing symptoms of deficiency. In addition, even the lack of light in the cloudy day, resulting in crop malnutrition, carbohydrates can not be converted, the leaves are thicker and smaller, the roots (especially the root tip) are injured, brown, no new roots. If the management of large fertilizers is carried out at this time, there are many roots in vegetables, and it is impossible to absorb nutrients normally. Vegetables are bound to suffer from deficiency. At this time, spraying foliar fertilizer is the most effective solution.
Second, the application of trace elements should not be used. In order to pursue high yields, some vegetable farmers have applied a large amount of fertilizer to the greenhouse, and neglected the application of trace elements, resulting in a general increase in nitrogen, phosphorus and potassium in the soil, and insufficient trace elements. Some vegetable farmers use excessive amounts of micronutrient fertilizers. Because of antagonism, roots absorb other elements and are inhibited, thus showing symptoms of deficiency.
Third, the concentration of soil solution in the shed is too high. Due to the large-scale use of chemical fertilizers by vegetable farmers, the soil solution concentration is too high, the root system of the plants is poorly developed, and sufficient nutrient supply plants cannot be absorbed to grow, and the plants exhibit deficiency syndrome.
Fourth, prevention is inappropriate. Some vegetable farmers see that the leaves of vegetables are yellow, and they think that they are lack of fertilizer, so they apply a lot of chemical fertilizers, and the results are counterproductive, leading to more and more serious diseases of vegetables. Therefore, the farmers should be given more guidance to distinguish the symptoms of various deficiency.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Adipic acid is mainly used in producing nylon fiber and engineering plastics, and polyurethane in quantity. Most of parts are used to produce PU, liquid for sole, polyurethane foam, etc. A small number of them are used for high quality lubricating oil.
High quality ester of adipic acid can be used as PVC and its copolymer, plasticizer of natural synthetic rubber. A large number of adipic acid ester is used to produce food packaging, thin film and PVC for insulation.
Adipic acid is also used for sour agent of food and drink. It is not easy to deliquesce, so it is used in dry food, and can be kept in a long time.
Adipic Acid 124-04-9,Adipic Acid,Adipic Acid Raw Material,99.7%Min Adipic Acid,Fine Adipic Acid
Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com