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Control Methods and Technical Key Points for Licorice Brown Spot Disease
Brown spot disease is an infection caused by a type of imperfect fungus (Deuteromycete), mainly damaging the leaves. Its symptoms are: circular or irregular lesions appear on the leaves, the center of the lesion is grayish-brown, the edge is brown, and black mold-like growth occurs on both sides of the lesion. Control methods: spray 1:1:100-1:1:160 Bordeaux mixture or spray 70% thiophanate-methyl wettable powder at 1500x-2000x dilution.
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Key Technical Points for Seed Treatment in Artificial Cultivation of Licorice
Licorice seeds have a hard seed coat and poor water absorption, with a germination rate of only 4-6%. Grinding or sulfuric acid treatment is needed to break the hard-seeded state and improve the germination rate and seedling emergence rate. I. Sulfuric acid treatment method. For each kilogram of clean seeds, mix evenly with 20-30 mL of 80% sulfuric acid. Once uniform sulfuric acid etching marks are visible on the seed coat, rinse with clean water and dry in the sun for later use. The treatment time depends on temperature and the amount of acid added. With the same amount of acid, higher temperatures require shorter treatment time, while lower temperatures require
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Key Technical Points for Field Management in Licorice Cultivation
Thinning and Final Thinning: In the year of direct sowing, thin the seedlings when they are about 6 cm tall, with a plant spacing of 10-15 cm; in the second year, maintain a plant spacing of 30 cm for final thinning. Cultivation and Weeding: After licorice is planted, weeds must be removed frequently in the first year, and the soil should be loosened in a timely manner. Soil loosening should go from shallow to deep, and herbicides can also be used for weed control. By the second year, once the plants have grown larger, weeds can hardly grow, so cultivation and weeding may no longer be necessary. Topdressing: In addition to applying base fertilizer at sowing or planting, during each year's growing period, phosphorus and potassium fertilizer can be applied as topdressing in early spring, with plant ash or compost applied per mu.
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Key technical points and precautions for transplanting licorice
Generally, it is done in late autumn or early spring. In late autumn, before the land freezes; in early spring, around Qingming Festival, and no later than mid-April. The transplanting field should be prepared on the basis of autumn plowing from the previous year by making beds (bed width depends on a row spacing of 50 cm and how many rows are planted in the bed), then applying fertilizer. Dig up the seedlings grown the previous year after the ground at the field corners thaws, remove the aboveground parts and the lower growing points, and set them aside for use. In the prepared field, open furrows at a row spacing of 50 cm, 12 cm deep, then place the seedlings flat at the bottom of the furrow, with the heads placed obliquely toward the inner slope, at a slope of 10 degrees. When placing the seedlings, 2 rows
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How to grow licorice for high yield? A full breakdown of the technical key points
1. Soil selection. Choose deep soil layers, good drainage, high-lying terrain, and sandy soil and sandy loam soil with relatively high calcium content. Waste flats and waste slopes with slightly alkaline soil and a pH between 7 and 8.5 can all be cultivated. Plots with low-lying terrain and heavy clay soil must not be planted. 2. Variety selection. Choose the new "Wosheng licorice" variety suitable for artificial cultivation. This variety has the following characteristics: First, strong adaptability, drought resistance, cold resistance, salt-alkali resistance, heat tolerance, and tolerance to poor soil. Its temperature adaptation range is 43 to 45°C. In areas with severe water shortage or relatively dry conditions, no wilting or death has been found, and it can adapt to weakly alkaline calcareous soil. At the same time, it is suitable for intercropping with young forest and fruit trees; second, a short growth cycle. With seedling raising and transplanting, the seedlings grow for 3 to 4 months, and after planting they can be harvested after 8 to 10 months of growth; third, fast growth. Because of its prostrate growth habit, combined with artificial cultivation techniques, it grows horizontally at 30 cm on the soil surface, and its absorption rate of natural conditions such as light, water, and fertilizer is high, so its growth speed is fast. Thirty days after sowing, 3 to 4 true leaves appear. At 60 days, the plant height is 30 cm, the root length can reach 20 cm, and the diameter is 0.5 cm; fourth, harvesting and processing are simple. All operations can be mechanized, less labor is used, and it can be sold after being naturally dried to 80 percent; fifth, high yield and good quality. The yield of medium rough grass per mu is more than 500 kg, and high-yielding fields can reach 800 kg. The skin is red, there are few branches, and the strips are uniform. It meets the standards of the national pharmacopoeia and complies with the germplasm requirements for building a GAP production base.
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Detailed Explanation of Shiitake Mushroom Storage Methods and Key Technical Points
After shiitake mushrooms are dried, they easily absorb moisture again if not stored properly. This is especially true during the rainy season when temperatures are high and humidity is great, making mold and insect damage more likely. Therefore, after drying, the shiitake mushrooms should be quickly graded and packed into plastic bags, and a small packet of anhydrous sodium chloride should be added to prevent the sugars in the mushroom body from seeping out and causing discoloration. At the same time, to prevent insect damage, the storage room can be fumigated with sulfur disulfide for 24 hours before storage, and storage should begin only after the residual gas has been expelled.
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Key Technical Points for Shiitake Mushroom Mycelial Growth and Soaking Management
After inoculation, the mycelium begins to germinate and colonize from days 1-6. At this time, the bag temperature is 1-3°C lower than the room temperature. The room temperature can be controlled at 28°C, and the indoor relative humidity should be kept below 70%. From days 7-15 of mycelial growth, the mycelium germinates and grows 4-5 cm. It is necessary to check whether the mycelial growth is normal. If contaminating microorganisms are found, promptly remove them from the cultivation room for handling, and maintain the room temperature at 24-27°C. Pay attention to ventilation. From days 16-25 of mycelial growth, the mycelium becomes interconnected. Remove the mycelial strips to allow oxygen to enter directly into the depths of the bag. After oxygen is introduced, the mycelial temperature rises rapidly within 12 hours.
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Detailed Explanation of Key Technical Points for Dehydrated Shiitake Mushroom Processing
1. Process flow: raw material selection → sun-drying → oven-drying → grading and packaging → finished product. 2. Operational key points. Material selection: shiitake mushrooms used for drying should be selected at moderate maturity, intact, free from disease, insects and damage; they are generally harvested when the caps are 80% mature. Sun-drying: after harvest, place the shiitake mushrooms on drying trays with the stems facing down and sun-dry them in sunlight; the time depends on the moisture content of the raw material, generally 5-8h. Oven-drying: oven-drying can be carried out in a drying room or a dehydrator. Temperature control during the oven-drying stage. Grading: after oven-drying, the shiitake mushrooms should be graded promptly. The grading standard
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Propagation Methods and Technical Key Points for Taxus wallichiana var. mairei (Chinese yew)
Select a suitable nursery site: choose a fertile, loose, neutral or slightly acidic soil plot with good drainage, preferably a fertile plot within woodland or in semi-shade. Apply ample base fertilizer, rake level, and prepare the seedbed ready for planting. Seed propagation: seeds mature in October; after timely harvesting, place them in a mixture of water and fine sand (water-to-sand ratio 2:1). Rub the seeds on a washboard to remove the outer seed coat and wear down the hard fleshy seed coat. Choose a shady, dry plot with no water accumulation, dig a pit, and store the seeds mixed with wet river sand at a ratio of 1:2 in the pit. In March of the following year, take out the cleaned seeds and soak them in 50-degree baijiu and 40
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Preliminary Study on Propagation Methods and Technical Key Points of Taxus wallichiana var. mairei
Taxus wallichiana var. mairei, also known as beautiful yew, shan gongzi, and hailuo pine, is a rare evergreen tree under first-class national protection. It has a graceful form, with a purplish-red, straight trunk, and when the seeds mature they turn red, with a vividly colorful aril. It has strong regional adaptability and can be planted anywhere south of Shaanxi. This tree species prefers a humid and cool climate environment, and is suitable for growing in moist, loose, well-drained acidic to slightly acidic soil. It is a semi-shade-tolerant species; seedlings tolerate shade and grow slowly, with growth increasing after 3 years. Because it also tolerates poor soil and has strong resistance to pests and diseases, it is the preferred species for reforestation on mountain land in East China after pine species
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