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How to identify high-quality fish fry? Selection tips every farmer must know
"Good seed is half the profit, good seedlings are half the grain." Robust, high-quality fish fry are not only an important factor in improving the survival rate of fry, but also an important foundation and guarantee for increasing fish yield and boosting economic returns. High-quality fish fry should have: appropriate and uniform size, robustness without injury, lively movement, and strong feeding competitiveness. Specifically, identifying high-quality fish fry can be summarized as "three looks and one sampling." First look: the size of the fry. The harvested size of the same fish species from the same pond should be neat and uniform, with little difference in body length and weight. In contrast, inferior fry with large individual differences and unevenness, due to reasons such as food competition, mixed germplasm, and poor feeding, often have a very low overall survival rate. Second look: the body color of the fry. High-quality fry have bright and glossy body color. Different species and different feeding methods produce fry with different body colors. Generally speaking, high-quality silver carp fry should have a silver-gray back and silvery-white sides and belly; high-quality grass carp fry have a light golden-yellow body color, with gray-black net-like scales relatively obvious, and the more robust the fish, the more prominent the light golden-yellow; high-quality bighead carp fry mostly have a light golden-yellow body color, with black markings all over the body not very obvious. If the body color of the fry is darker, or even blackish, it indicates that the fry are weak or diseased. The gloss on the body surface of the fry is caused by the mucus layer covering the body surface, which is rich in proteases, lysozymes, etc., and has the function of protecting the scales and skin of the fry from invasion by diseases and pests; fish or weak fry lack a mucus layer, so the body surface has no gloss. Of course, when fry are attacked by external diseases and pests, they will also secrete a large amount of mucus and lose their gloss. For example, when fish are attacked by Ichthyophthirius multifiliis, the body surface will be covered with a thick layer of mucus, which is a stress response made by the fry to external invasion. Third look: the activity of the fry. High-quality fry are lively in movement, strongly gregarious, quickly gather in groups and dive to the bottom when startled, have strong feeding competitiveness and strong upstream swimming ability. When crowded, the fry heads point downward, and only the tails can be seen constantly fanning; while weak or diseased fry with poor constitution move slowly, do not form groups, swim alone, have weak feeding competitiveness, and poor upstream swimming ability. One sampling: randomly sample fry to check their quality. High-quality fry jump violently when out of water, are plump, with small heads and thick backs, glossy body color, moist muscles, intact scales and fin rays, gill covers not open, tails not bent, no parasites or wounds on the body surface, and normal body shape without deformities. In contrast, weak or diseased fry jump weakly, have incomplete scales and fin rays, congestion, emaciated bodies, large heads and small tails, backs as thin as a knife edge, and even those with "no belly" or that "stick to the net" are considered inferior fry.
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Practical tips for plucking chicken and duck feathers with ease
1) When slaughtering chickens or ducks, first give the bird two tablespoons of white vinegar or baijiu, wait 5-10 minutes until the pores loosen and expand, then slaughter it, and scald it with hot water; the feathers will come out very easily. 2) Boil a pot of water, add one tablespoon of vinegar, put the slaughtered chicken into the pot so the water covers it, keep turning it, and after a few minutes take it out; the feathers will be very easy to pluck. 3) Do not bring the water for scalding duck to a boil, because duck feathers shrink when they meet 100°C boiling water and become very hard to pluck. The correct method is, when the water is just starting to bubble, put the slaughtered duck
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Home Cultivation Methods and Care Tips for Lilies
Scientific name: Lilium brownii var. viridulum. Origin and distribution: The lily is native to the eastern and central regions of our country. Habits: Fairly cold-tolerant, fond of strong light, not tolerant of shade. Insufficient light will affect growth and flowering. It prefers well-drained sandy loam rich in organic matter. Its disease resistance is poor, and it is prone to disease in hot, humid environments. Main species and varieties: According to leaf arrangement and flower shape characteristics, it is divided into 4 groups: 1. Lily Group: This group is characterized by scattered leaves, trumpet-shaped or bell-shaped flowers, and
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Summer rabbit-raising tips: how to raise rabbits well in hot weather
Summer has high temperatures and high humidity, which easily cause many adverse effects on rabbit production. Such as heat stress, decreased feed intake, slowed weight gain, reproductive disorders, etc. To minimize the adverse effects, the following measures are recommended: 1. Vigorously focus on heat prevention and cooling. Plant trees, forage grass, or some vine-type plants in the open space in front of the rabbit house; this can both shade and cool and green the environment. If the planting season has been missed, a shade shed 3-4 m high can be built. When the temperature inside the rabbit cage reaches 30°C, sprinkling water on the ground can also be used to cool it down, but when the house is humid, ventilation must be strengthened
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How to save garlic seed? Mastering these tips is key
Garlic loses vigor because it is propagated vegetatively by replanting cloves year after year, resulting in weak, stunted plants, poor disease resistance, smaller bulbs and lower yields. In concentrated garlic-producing areas, seed selection, seed saving and purification and rejuvenation should be carried out properly. Selecting bulbs and cloves Before harvest, select plants in the field, mark those that match the variety's characteristics, grow vigorously and are free of pests and diseases, and pick them out as seed at harvest. At harvest, also choose bulbs that are large and round, free of deformed cloves, undamaged, uniform in size, and with skin color, flesh color and clove division matching the variety's characteristics; dry, braid and store them separately; select again when planting, remove rotten, damaged, soft and yellowed cloves caused by heat, freeze injury or bruising, and plant large cloves; bulb and clove selection must be done every year, which can improve the seed stock's quality.
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How to Break Garlic Dormancy? A Complete Guide to Methods and Tips
After the garlic bulbs are harvested, there is a physiological dormancy period of about two months. To sow early so that green garlic, garlic sprouts (blanched garlic shoots) and garlic scapes reach the market sooner, the dormancy of the seed garlic can be broken by the following three methods. 1. Low-temperature treatment method: From late July to early August, put the seed garlic into plastic woven bags, soak in cold water, and sow after 15-20 days under low-temperature conditions of 3-5°C; seedlings will emerge 3-7 days after sowing. 2. Moist garlic awakening method: 15-20 days before sowing, soak the seed garlic in cold water for 5-10 minutes, take it out and drain, then spread it flat on
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Home-style Recipe and Cooking Tips for Braised Snakehead with Garlic
Main ingredient: one snakehead. Ingredients: a dozen or so garlic cloves, dry starch, yellow rice wine, soy sauce, monosodium glutamate (MSG), vegetable oil. Method: Slaughter the snakehead, remove the innards, and wash clean. Coat the fish with dry starch, fry briefly in oil at 40% heat, and remove. Briefly stir-fry the garlic cloves in oil without burning, and remove. Put water, yellow rice wine, soy sauce and MSG in the pot, add the fried fish and garlic cloves, braise over low heat until cooked, then add a little starch to thicken the sauce.
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How to care for lilies in summer? Master these care tips
Lilies come in a wide variety of colors and varieties, with large, trumpet-shaped flowers, and are widely loved because their name carries the meaning of "a harmonious union lasting a hundred years" and "a heart in harmony with all things." Summer is the main flowering and dormancy period for lilies, and care and management during this time is very important. Cooling and sun protection. The suitable growing temperature for lilies is 15°C to 25°C, within which they can maintain good growth and flowering. When flowering, the potted plants can be moved to a shaded spot, or a screen can be placed over the plants for shade, along with enhanced ventilation and cooling, which helps extend the flowering period. Lily bulbs cannot tolerate
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How to prevent jujube fruit drop? These practical tips you need to know
Recently, many areas have had excessive rain, and many jujube trees drop a large amount of leaves and fruit during the young fruit stage, causing serious yield reduction. The jujube trees of a certain Fan in Sanfen Village, Nanhuangqin Village, Duancun Township, Xian County, Cangzhou City, are still green with lush branches and leaves, and the developing jujube fruits bend the branches. Even the seedless jujube, which normally has serious pre-harvest fruit drop, has not turned red or dropped this year and is growing well. Fan's specific methods are: take measures suited to local conditions according to this year's climate characteristics. Since June this year, there has been a lot of rain and high field humidity, which is suitable for small jujube fruit set. One jujube bearing shoot can grow dozens, even
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How to Choose Among 8 Major Turtle Species? A Detailed Guide to Practical Selection Tips
Turtle (Chinese pond turtle): The male should have a blackish carapace, a thick, solid tail base, and a long, deep concave plastron; the female should have a short, thick body and a short, thick tail. It is best to choose turtles aged 8 years or older; the female should weigh 350 grams, while the male only needs to have reached the age of gonadal maturity. The female-to-male ratio is 2:1 to 3:1. Golden coin turtle: When selecting, hold it in your hand and turn it over; its head will extend very long, with even thickness, and its eyes will move flexibly and look lively. The skin should be glossy, the temperament gentle, the gap between the upper and lower shells at the tail large, and the cloacal opening wide. Turtles aged 6 years or older are required.
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