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How to defend tea plants against heat damage? A detailed explanation of practical technical measures
Tea plant heat damage refers to the meteorological disaster that, under long-term high-temperature and dry climate conditions, causes tea yield reduction, stunted tea plant growth, or plant death. The tea plant originated in the subtropics and is a perennial evergreen plant, with the habit of preferring warmth and humidity, tolerating shade, and fearing drought. When there is prolonged high temperature and severe drought, scorching sun, low rainfall, and relative air humidity below 50%, leaf transpiration intensifies, and the water absorbed by the root system cannot compensate for the consumption of the aboveground parts, thus causing the tea plant to wither, drop leaves, and even die. To prevent tea plant heat damage, in addition to selecting heat-resistant tea
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Key Points and Practical Methods of Tea Plant Breeding Techniques Explained
In conventional tea plant breeding, single-plant selection and crossbreeding are mainly used. More than 90% of new tea plant varieties at home and abroad have been developed using these two methods. Single-plant selection uses naturally mutated material, that is, selecting superior individual plants from existing tea plant populations, then expanding their numbers through propagation while maintaining their superior traits. Crossbreeding uses gene recombination and interaction, making it possible for hybrid offspring to show combined superior traits of the parents or types superior to the parents. ① Correctly select parents; ② Master crossbreeding techniques; ③ Strengthen management after pollination.
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How to prevent and control leaf blight in Schisandra chinensis? Practical tips shared
Leaf blight in Schisandra chinensis mostly occurs from late May to mid-July, with the lesions appearing scorched yellow. It initially starts at the leaf tip and gradually expands and spreads; in severe cases, the entire leaf turns yellow and dies. The disease is severe under high temperature and high humidity with poor ventilation. Control methods: spray with 400-500 times zineb and 1500 times thiophanate-methyl; it is best to spray once a week before the disease occurs, for 2-3 consecutive sprays, or use Bordeaux mixture sprayed once a day.
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How to prevent and treat rabbit ear mange? A comprehensive introduction to practical methods
Symptoms: Sick rabbits have reduced appetite, gradually lose weight, constantly shake their heads, scratch their ears with their feet, and are restless and agitated. Inside the external ear canal there is dry yellow crust, which fills the entire ear. A few rabbits show head tilt, and finally develop convulsions and die. Diagnosis: Based on the symptoms, a diagnosis of rabbit ear mange can be confirmed. Prevention and treatment measures: 1. Treatment: ① Isolate and treat sick rabbits promptly when found, and strictly disinfect cages and equipment by spraying with 1-2% trichlorfon solution. ② Use Chongkexing liniment to apply inside the ear canal, every
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Special Topic on Sandworm Farming Techniques: A Complete Analysis of Scientific Methods and Practical Tips
Overview of Sandworms The sandworm (Nereid), English name - Clamworm, belongs to the phylum Annelida, class Polychaeta, and is commonly known as sea worm, sea maggot, sea centipede, and sea leech. Those harvested and farmed are mostly large species of the genera Perinereis Kinberg and Neanthes Kinberg. They are worm-shaped, with larger individuals reaching more than 10 cm in body length, and some species reaching more than 20 cm. The cross-section is round or slightly flattened, with many body segments. The body is divided into head
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How to prevent and control peach leaf curl? A detailed explanation of practical technical points
I. Symptoms and damage. This disease occurs from time to time in the south, and when severe it causes branch dieback and affects ornamental value. The disease mainly damages leaves. When leaves unfold in early spring, the leaf margins curl downward, and the diseased leaves become blistered in part or entirely, the leaves thicken, become brittle in texture, and turn yellow or red, with the leaves distorted and deformed. In early summer, a grayish-white powdery layer forms on the diseased parts, and when the disease is severe the leaves fall early. When young shoots are damaged, they appear grayish-green or yellow, with short and thick internodes and slight curvature; the upper leaves cluster and curl. When the disease is severe, the branches die.
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How should garlic be stored to keep it fresh? These methods are very practical
1. High-temperature storage. Keeping garlic in a relatively high temperature environment between 28-32°C can keep it from sprouting, thereby extending its storage time, but this method is only suitable for shorter-term storage, because the garlic bulbs are prone to losing water, becoming spongy, and shrinking. 2. Low-humidity storage. Use mechanical refrigeration (constant-temperature warehouse storage) to lower the temperature, inhibit its life activities, and control the sprouting of the cloves. This method is currently widely used. 3. Controlled-atmosphere storage. By using the inhibitory effect of the gaseous environment on life activities, under suitable low-temperature conditions, adjust
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How to prevent and treat white mold disease in turtles? A detailed guide to practical methods
White mold disease in turtles, also known as water mold disease, mold disease and fungal dermatitis, is caused by fungi infecting the skin of turtles and then multiplying in large numbers. 1. Symptoms. In the early stage of the disease, grayish-white lesions appear successively on the turtle's carapace, plastron, neck and limbs, followed by a large amount of grayish-white cotton-like mycelium. Congestion and ulceration occur at the wound. In severe cases, the mycelium becomes thick and dense, causing the affected turtle to respond slowly, move sluggishly, lose appetite, become emaciated, and finally die of exhaustion, with small turtles being especially severely affected. 2. Prevention. For
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How to increase fish growth speed? Practical aquaculture methods shared
Add mugwort leaves. Mugwort leaves (Artemisia argyi) are a widely distributed plant, containing protein, fat, vitamins, and various essential amino acids, minerals, and more. According to experiments, adding 5% mugwort leaves to feed can increase the weight gain rate of 1-year-old pond-cultured common carp (Cyprinus carpio) by 15.4%-22.4%, and the weight gain rates of silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis) cultured in the same pond are also significantly increased; the weight gain rate of 1-year-old common carp in cage culture can be increased by 14.5%. Add earthworms. Earthworms contain 50.4%-65.8% crude protein, amino acids
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How to Prevent and Treat Vitamin Deficiency in Fish? A Detailed Guide to Practical Methods
Vitamin A group: When fish lack vitamin A, it causes poor eyesight, dry eye disease, night blindness, bleeding of the skin and eyes, keratinization of epithelial tissue, bleeding at the base of the fins, deformed gill lamellae that often fuse together with enlarged tips, abnormal bone development, loss of appetite, and slow growth. To address these symptoms, increase the vitamin A content in fish feed and use vitamin blends in combination. For example, when raising herbivorous and omnivorous fish, green fodder, carrots, and yellow corn can be added to and combined with the feed.
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