Spring is the period of strawberry vegetative growth and reproductive growth. Strengthening the spring management of strawberries is extremely important for improving strawberry yield and improving quality.
First, pay attention to timely uncovering the film and refining: When the average temperature of the day is stable at around 10 °C, the overwintering cover should be removed. After uncovering the cover, the dead leaves, diseased leaves and old leaves should be removed in time to improve the light transmission conditions and prevent the occurrence of diseases.
Prevention and control of pests and diseases: Shallow shovel in early spring, effectively eliminating eggs and larvae of weeds and soil. Fumigation of sulfur lamps in the shed can prevent gray mold, powdery mildew and small pests such as mites and red spiders.
The second is to pay attention to cultivating weeding and loosening soil: timely weeding and weeding after the Spring Festival, we must be shallow, so as not to hurt the strawberry root system and prevent the soil mass from being crushed; eliminate the drainage ditch, waist ditch, ditch, etc. in time to eliminate the waterlogging .
The third is to pay attention to timely topdressing and watering: it is necessary to combine the watering and topdressing fertilizer once, applying 10-15 kg of urea per acre or 20-30 kg of compound fertilizer; in mid-April, the strawberry is chased before flowering before the flowering, and the acre is used. Compound fertilizer 10-15 kg; In addition, spraying 2-3 times of 0.3% potassium dihydrogen phosphate solution on the foliar surface during flowering results is beneficial to increase yield and quality.
The fourth is to pay attention to the flowering and buds: the flowers on the strawberry inflorescences have good results, and the fruits are large and mature. Therefore, after the strawberry is bud, the thin flower buds should be removed to reduce the nutrient consumption, so that the fruits are large, mature, early, and good quality, and 20%-25% of the late weak flower buds are eliminated.
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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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