This year is in the warm winter, the low temperature suddenly falls, it is not suitable for people, not to mention the same for plants. Therefore, spring wheat field management is very important. Nowadays, under the premise of continuous food growth for 12 consecutive years, the government has emphasized that it is necessary to adjust the structure and transfer mode. The area will not increase for wheat, so it is only working hard on yield. How to change the agricultural production mode can not rely solely on the government to increase investment, only to reduce the use of pesticides and fertilizers to make a fuss, to improve the technical content of wheat cultivation.
The four-level linkage created by the Chinese Academy of Agricultural Sciences and Xinxiang City of Henan Province has promoted the agricultural green production and efficiency model. Xinxiang City, as an old model on the agricultural front, actively promoted this work smoothly and provided some valuable experience to the whole country. They are currently proposing large-scale grain producers, professional cooperatives, food enterprises, and high-yielding governments to create farmers. These practices are being rolled out one by one. They need technology to be obtained from experts and reserve for wheat production. The foundation of the wheat planting here is well grasped, the spring tube is early, the measures are grasped, and the grain is well stocked. The next step is to insist on promoting the water and fertilizer management during the jointing period, pay attention to the prevention and control of pests and diseases, improve the management level in spring, and contribute to the harvest of summer grain.
At present, red spiders have occurred in some places and must be prevented in time. It is necessary to eliminate the disease center in time for wheat stripe rust. Focus on the prevention and control of pests such as sheath blight, powdery mildew, red spiders, aphids and the like that often occur in spring. For wheat sheath blight, spray control should be carried out before mid-March to treat powdery mildew. For the wheat sucking insects, the two key periods of the flood season (the middle of April) and the adult period (the end of April and the beginning of May) should be strictly controlled in a timely manner. In the last year, the plots with serious occurrence of the sucking insects should be combined with watering before the jointing. , apply poisonous soil control to ensure control. For plots where weeds occur severely, before reaching the jointing period, the daily average temperature is stable after passing 6 °C, choose fine weather, 10 am to 4 pm, according to different weed species, choose Hummer, Thiasulfuron The herbicides such as thiophensulfuron are sprayed and controlled, and the concentration and technical operation rules should be strictly followed to avoid phytotoxicity. Strictly prevent livestock and poultry from indulging in early spring, and protect the wheat seedlings from safe and healthy growth. Even in large wheat fields, it is impossible to control the germination of the young crops. Otherwise, the wheat seedlings will be injured, the resistance will be reduced, and even the dead seedlings will cause serious crop losses.
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Chinese herbal medicine chemistry refers to the science of using modern chemical theories and methods to study the chemical composition of Chinese herbal medicine. The object of Chinese herbal medicine chemistry research is the chemical composition of Chinese herbal medicine. The chemical composition of Chinese herbal medicine is very complex, usually sugar, Amino Acid, protein, oil, wax , enzymes, pigments, vitamins, organic acids, tannins, inorganic salts, volatile oils, alkaloids, glycosides, etc. Every Chinese herbal medicine may contain multiple ingredients. Among these ingredients, some of them have obvious biological activity and play a medical role, and are often called active ingredients, such as alkaloids, glycosides, volatile oils, amino acids, etc. The reason why Chinese herbal medicine has medical effects is mainly due to the active ingredients it contains. In addition to many active ingredients of Chinese herbal medicines that have been studied in the past and have been widely used, such as berberine (berberine), which is Antibacterial and anti-inflammatory in Coptis chinensis, ephedrine, which is antiasthmatic in Ephedra, and reserpentine, an antihypertensive ingredient in Rauwolfia, In recent years, more active ingredients of Chinese herbal medicines have been discovered one after another at home and abroad, especially in terms of biological active ingredients for anti-tumor, treatment of cardiovascular diseases and chronic bronchitis. Other ingredients are commonly found in Chinese herbal medicine, but usually have no biological activity and no medical effect, and are called "ineffective ingredients", such as sugars, proteins, pigments, resins, inorganic salts, etc.
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