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Tea plant sexual-line breeding methods and key technical points
A breeding method in which sexual progeny of tea plants are produced through the union of male and female gametes and, after selection, new cultivars are developed. The cultivars developed are called sexual-line cultivars. The methods are: 1. Selection of superior individual plants or types: according to the breeding objectives, carry out individual plant selection or group selection from the original material nursery or production tea gardens; 2. Seed collection and seedling raising: for the initially selected individual plants or groups, separately reserve and collect seeds, and raise seedlings separately by line, carrying out identification of seedling-stage traits and cultivar purity; 3. Family or group comparative trials: arrange comparative trials of the selected families or groups together with control
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What technical points should be noted when introducing tea plants?
Tea plant introduction is simple and easy to achieve results. Since the 1950s, the area planted with improved varieties has been expanded. For example, the Yunnan large-leaf variety was introduced to Guangdong, Guangxi, Sichuan, Guizhou and other provinces and autonomous regions, and the area has reached more than 1 million mu. Fujian, Zhejiang and other provinces used introduced and acclimatized Yunnan large-leaf varieties as original material to breed a group of excellent high-yield new varieties. New progress has been made in introducing tea from the south to the north. The northernmost boundary of tea plant distribution in China has shifted from about 34°40'N to near 37°49'N, advancing northward by more than 350 km. Tea varieties have also been introduced successively from the former Soviet Union, Ja
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Detailed Explanation of Tea Plant Pruning Methods and Technical Key Points
Tea plant pruning is a measure carried out on the basis of comprehensive management of soil, fertilizer and water in the tea garden, in which, according to the natural conditions of each area, tree age and growth habits of the variety, the distribution and transport of nutrients in the tea plant body are appropriately controlled and regulated, so that nutrients are rationally utilized and distributed. However, it must be closely coordinated with fertilizer and water management, combined with plucking and leaf retention, and attention must be paid to pest and disease control, so that the tea plants recover quickly and grow well after pruning. Formative pruning: For the first formative pruning of young tea plants, the height and branch thickness have a close bearing on the strength and number of future branches.
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Tea Plant Cutting Propagation Methods and Technical Key Points
One of the asexual propagation methods for tea plants. A portion of the vegetative organs of a tea plant is inserted into a moist, loose red-yellow soil nursery to form a new, complete plant. Tea seedlings propagated by cuttings exhibit heredity similar to the mother plant and, under the same environmental conditions, can maintain the traits and characteristics of the mother plant. Types of cuttings: these can be summarized as: stem cuttings, leaf cuttings and root cuttings. ① Stem cutting methods include long-shoot, medium-shoot, short-shoot, hoop-strip and old-stem cuttings, etc. Using a complete tea branch as a cutting for propagation
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Control Methods and Technical Key Points for Scaly Leg Mite Disease in Chickens
Scaly leg mite disease in chickens is a condition caused by sarcoptic mites, often presenting as two forms: depluming itch and scaly leg. 1 Pathogen and Symptoms The pathogen of depluming itch in chickens is the scaly leg mite (Knemidocoptes mutans), which is round or oval in shape and about 0.3 mm long. This mite mostly invades the skin along the feathers and parasitizes the base of the feathers, causing inflammation. Lesions are mostly seen on the back, wings, rump, and thighs of chickens, with severe localized itching and feather loss, hence the name depluming itch. Affected chickens peck and pull at their feathers, causing feathers to fall out, the skin to become red, and
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Detailed Explanation of Key Technical Points for Pollution-Free Fish Storage and Transportation
The entire process of farmed aquatic products from pond to table is subject to safety and quality monitoring, of which storage and transportation is one of the important links. If errors occur in storage and transportation, the so-called pollution-free status will be lost at the final step. 1. The water quality used for storage and transportation shall comply with the relevant national regulations. During storage and transportation, fish should be handled gently and transported gently, avoiding squeezing and collision, and care should be taken not to let them dehydrate or lose ice. 2. Packaging containers should be non-toxic, odorless, clean, sturdy and have good drainage conditions. Live fish can be held in canvas buckets, live fish boxes or nylon bags with oxygen, while fresh fish use bamboo
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Management Methods and Technical Key Points for Introduced Snakehead Fry and Fingerlings
There are 3 sources of snakehead fry and fingerlings: first, artificial breeding; second, purchasing from other places or other units; third, catching wild fry and fingerlings in places with lush aquatic plants in reservoirs, lakes, and ditches. How to manage the latter two types of fry and fingerlings is described below: 1. Fry and fingerlings purchased from other places or other units. When purchasing fry and fingerlings, carefully select fish that are robust and of good quality. The specific standards are: from the external appearance of the fish, the scales and fin rays are required to be intact, the color bright and glossy, the body shape normal, and there is no external injury or disease. From the physique, a high degree of plumpness is required,
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Disease Prevention and Treatment Methods and Technical Key Points for Turtles
Parotitis Cause: The pathogen is Aeromonas punctata subsp. punctata. The main cause is water pollution. Symptoms: Affected turtles move slowly, often raise their heads and necks high in water or on land, with abnormally swollen necks and bulging hind limb fossae. There is gas under the skin, and the limbs are swollen; in severe cases, blood flows from the mouth and nose. Prevention and treatment: Inject streptomycin sulfate at 100,000-120,000 units per kg of turtle body weight. Inject once a year. Routinely use 30 mg/L furazolidone every 2-3 months
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Detailed Explanation of Turtle Egg Incubation Methods and Technical Points
Using the "Automatic Heating and Temperature Control Device for Turtle-Rearing Greenhouses" (China Patent 95239104.X) for turtle egg incubation, the sand temperature is controlled at 32°C, the relative air humidity is adjusted to 80%, the interstitial sand humidity is around 10%, and ventilation is provided at appropriate times. Hatchlings emerge in about 50 days, with a hatching rate of 88%-98%. From 1997-1998, a research institute in Suzhou used this "automatic heating and temperature control device" to conduct temperature-controlled breeding experiments on the yellow-margined box turtle (Cuora flavomarginata). The device uses a single-phase power supply, 1-4KW, adjustable, controlling the sand temperature at 28-32°C, with humidity
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Detailed Explanation of the Production Method and Key Technical Points for Odorless Allicin
Garlic is a rather unique vegetable and seasoning, and in particular the allicin it contains can break down the proteins in fish, meat and eggs, making those proteins that are difficult for the human body to absorb become easy for the human body to absorb and utilize, helping digestion and promoting nutrient absorption. However, the odor of allicin is unpleasant. A method for producing odorless allicin stock solution is described below: I. Room-temperature method 1. Process flow: fresh garlic → sorting → crushing → drying → grinding into powder → soaking for deodorization → separation → finished product. 2. Operating method: (1) Material selection. Select mature
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