Specific application method of compound fertilizer
Compound fertilizer is suitable as base fertilizer. Application method of base fertilizer: The granule compound fertilizer containing various nutrients of nitrogen, phosphorus and potassium is applied to a certain depth of soil when cultivating land before sowing. The depth of fertilization varies from crop to crop, the depth of fertilization of food and vegetables is generally 20 cm, and the depth of fertilization of fruit trees is 30-40 cm. Only when the compound fertilizer is applied to a certain depth can the demand for nutrients in the middle and late crops be supplied. The compound fertilizer used as the base fertilizer applies all the phosphorus and most of the potassium required for the growth period of the crop. Nitrogen is too active, and only part of it can be applied to the base fertilizer through compound fertilizer. At least half of the nitrogen should be applied as top dressing in the form of elemental nitrogen fertilizer during the vigorous growth period of the crop. Therefore, the compound fertilizer is suitable for the base fertilizer, and the nitrogen ratio cannot be too high. The nutrient ratio of nitrogen, phosphorus and potassium in any compound fertilizer is fixed. The calculation of the amount of base fertilizer is based on the content of phosphorus or potassium, and half of the nitrogen fertilizer needs to be applied in the middle and late stages. Compound fertilizers are generally not suitable for top dressing or water flushing. Among them, the phosphate fertilizer, even if it is fully water-soluble, rarely moves downward on the soil surface, and the crop root system is difficult to use. Although the vegetable farmers in Guangdong are accustomed to importing the general-purpose 45% (15%-15%-15%) compound fertilizer into water, the leafy vegetables have obvious fertilizer efficiency, but their nutrient utilization rate is low, not only waste of fertilizer. The cost is not cost effective and needs improvement. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Plant extracts refers to substances extracted or processed from plants (all or part of plants) with appropriate solvents or methods. They can be used in pharmaceutical industry, food industry, daily chemical industry and other industries.
Development History
Classification
Ashwaganda Root Extract, ,Sophora Japonica Extract, Hypericum Perforatum Extract, Salvia Miltiorrhiza Extract Xi'an Tian Guangyuan Biotech Co., Ltd. , https://www.tgybiotech.com
There is a conceptual intersection between plant extracts and Chinese herbal extracts. The raw materials of plant extracts in China mainly come from Chinese herbal medicine. Therefore, domestic plant extracts can also be called traditional Chinese medicine extracts to some extent. They are generally included in the category of traditional Chinese medicine products in China's export trade statistics.
China's plant extracts come from the traditional Chinese medicine industry, and the overall development time is relatively late. In the 1970s, some Chinese herbal medicine factories began to use mechanical equipment to extract active ingredients, but only as part of production, plant extracts have not been produced on a large scale. Until the 1990s, the international trend of returning to nature rose, and people began to tend to use natural plant products. During this period, China's foreign trade rose, and China's Plant Extract industry was getting better and better. In the 21st century, with the application of more advanced extraction methods such as enzymatic extraction, ultrasound, supercritical extraction, membrane separation technology and microwave extraction technology, the yield of extract has been greatly improved, and China's plant extract industry has entered a golden period of development. From 2010 to 2015, the production capacity and export volume of plant extracts increased steadily and rapidly every year, and the proportion of plant extracts in the export of traditional Chinese medicine also increased a lot. Since 2016, the market situation of plant extracts has changed.
1. According to the content of active ingredients, it can be divided into three categories: effective monomer extract, standard extract and ratio extract;
2. It is divided into glycosides, acids, polyphenols, polysaccharides, terpenes, flavonoids, alkaloids, etc;
3. According to the product form, it can be divided into vegetable oil, extract, powder, lens, etc.
4. According to the purpose, plant extracts can be divided into natural pigment products, traditional Chinese medicine extract products, extract products and concentrated products.
Application
The application scope of plant extracts has been very wide nowadays. In addition to traditional Chinese medicine products, with the gradual increase of people's trust and dependence on natural products, a large part of plant extracts have been used in health products and food ingredients. In addition, plant extracts have been used in cosmetics and feed in recent years.
Some of the best-selling plant extracts in the world have several classifications. For example, Rhodiola, ginkgo, ginseng extract, etc. are used in the fields of brain strengthening, intelligence, prevention and treatment of Alzheimer's disease; Green tea, Fructus aurantii Immaturus, apple and bitter melon polypeptide extract are applied to reduce weight, reduce blood sugar and prevent diabetes. Paclitaxel, tea polyphenols, theanine, bioflavonoids such as lycopene and Anthocyanin are used in the field of natural anti-cancer; Licorice, garlic, Astragalus membranaceus and soybean extracts are used in the field of human immune system.