It is rich in nutrients, shared by medicines and foods, and has a large market demand, so as to become one of the main medicinal materials in Gansu. The long-term growth of a long-term, a healthy garden can be produced for 30 to 50 years, so long growth period, need to strengthen management, in order to ensure the continued high yield of 枸杞. At present, the province enters the winter, and the eucalyptus body will go to sleep. The management of this period is the key to the high yield in the next year. Some winter management measures are introduced.

1. Clean the countryside. In the winter, the garden will be thoroughly cleaned, and the litter will be cleaned up to reduce the degree of damage to the next year. The litter can be buried or used as a beverage.

2. Winter pruning. The pruning requirement is simple, and the winter pruning is relatively safe for the eucalyptus tree than for spring and summer pruning. The order of pruning is: cutting the long branches of the roots, trunks, main branches, inner stalks, and crowns on the top of the crown along the canopy from the bottom of the canopy. The cuts should be flat, because the dormancy is trimmed, and the nutrient storage is In the branches and stems, the wounds of the cuts are naturally dried and do not damage the trees. The germinated long branches of the eucalyptus are cut off to prevent lyophilization or draining during the cold winter. The trimmed waste branches are collected, processed into feed, finely pulverized and then fed to the animals.

3. Strengthen winter field management. The lychee has a sweet taste and no odor. Sheep, rabbits or other animals can easily enter the garden to eat lychee. The garden must be supervised, and don't let the animals enter the garden to injure the trunk and ensure safe wintering.

4. Fertilization and irrigation. After the cockroach enters sleep, fertilize first. Apply 5 to 10 kg of fully decomposed organic fertilizer per plant, dig a ditch at 50 to 100 cm in the center of the stem, or dig a circular fertilization tank at the projection of the outer ring of the canopy, 15 to 25 cm deep and 20 to 30 cm wide. Can not smash the roots to prevent root rot. In the soil when the night is frozen, the irrigation is carried out. It is necessary to shallow irrigation, not to accumulate water. Generally, about 80 square meters of acre is used to protect the cockroach and survive the winter.

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Enzyme

The production and quality of enzyme preparations produced by plants are unstable due to the influence of growth area, season, climate, etc. The enzymes produced by animals are mainly extracted from the glands of slaughtered livestock, and the source is limited; only enzymes produced by microorganisms can meet the needs of any scale, with high yield and stable quality. Microbial enzyme preparations can not only replace the main types of animal and plant enzyme preparations with the same performance, but also produce high-temperature-amylases that act as catalysts at 100°C and detergent proteases that act at pH 10-12. In the 1940s, the microbial enzyme preparation industry developed rapidly. At present, the production of enzyme preparations is mainly based on deep fermentation, supplemented by semi-solid fermentation, and the ability of the strains to produce enzymes has also been greatly improved. The immobilized enzyme and immobilized cell technology developed in the 1960s and 1970s enabled the enzyme to be used repeatedly and continuously reacted, and its scope of application was also expanded. At present, in addition to the food and textile industries, microbial enzyme preparations are also used in daily chemistry, chemicals, pharmaceuticals, feed, papermaking, building materials, biochemistry, clinical analysis and other aspects, becoming an important sector of the fermentation industry.

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