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What are the growing environment requirements for primroses?
They prefer a cool summer and warm winter climate and a humid, well-ventilated environment. They require plenty of sunlight, with medium day length being ideal. They are not cold-tolerant, not tolerant of high temperatures, and sensitive to direct strong sunlight; they are not shade-tolerant, slightly drought-tolerant, and tolerant of moisture and fertilizer. They grow best in loose, fertile, well-drained sandy loam rich in humus. Light and temperature: preferring cool conditions and avoiding high temperatures are the basic temperature requirements for primroses. The suitable growing temperature is 20°C during the day and 5-10°C at night. They can grow well at 12-22°C. When the temperature is too high, the plants grow slowly, while at lower
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Stocking fish fingerlings in early spring requires care; mastering the method is key
Fingerling quality For fingerlings of the same species and age, the specifications should be uniform, with little difference in body length and body weight, thick back muscle, bright color, intact scales and fin rays, normal activity, and strong upstream-swimming ability. After being taken out of the water and placed in a basin, the gill cover should not open, the tail should not bend, and the fish should keep jumping, with no wounds or parasites on the body surface. Fingerling disinfection Some farmers do not disinfect fingerlings at all when stocking them, resulting in a high disease rate, and drug treatment is not ideal. In fact, as long as fingerling disinfection is done well, it often achieves twice the result with half the effort in preventing fish diseases. Fingerlings
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Sowing and raising prickly ash seedlings requires careful management
For de-oiling treatment, the amount of prickly ash seed used per mu is 7-10 kg. The seed coat of prickly ash is hard and contains oil, so it does not absorb water easily and emergence is relatively difficult. There are many empty seeds, accounting for more than about 50%, so before treatment, water separation must be carried out first, using a strainer in water to remove empty and shriveled seeds, and then the plump seeds are subjected to de-oiling treatment. The de-oiling method is: (1) Prepare the solution. Dissolve 200 g of washing powder in warm water, then stir it evenly into 50 kg of cold water and pour it into a water vat or basin, with the water temperature at 50°C-60
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Releasing fish fry in early spring requires care; keep these precautions in mind
Fish fry quality For fish fry of the same species and same age, the specifications should be uniform, with little difference in body length and body weight, thick back muscles, bright color, intact scales and fin rays, normal activity, and strong upstream-swimming ability. After being taken out of the water and placed in a basin, the gill covers should not open, the tail should not bend, and the fish should keep jumping, with no wounds or parasites on the body surface. Fish fry disinfection Some farmers do not disinfect fish fry at all when releasing them, resulting in a high disease rate, and drug treatment is not ideal. In fact, as long as fish fry disinfection is done well, disease prevention can often achieve twice the result with half the effort
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Nutritional Requirements and Feeding Guidelines for Gestating Sows
[The period from mating and conception to farrowing is called gestation] The basic tasks of feeding and managing gestating sows are: to ensure the normal development of fertilized eggs and fetuses in the mother's body, to prevent stillbirths and miscarriages, so as to obtain a large number of good-quality piglets; to ensure that sows are in good body condition during gestation, laying the foundation for lactation during the nursing period. In addition, first-time sows need superior feeding, as first-time sows require 23-30% nutrition to maintain their own growth and development. 1. Weight changes in gestating sows: During gestation, sows
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Swine necrotic dermatitis requires focused prevention and control in summer and autumn
I had never seen swine necrotic dermatitis before, and thought it was an old disease that might have already disappeared in our area. Unexpectedly, in July last year, it occurred at a small-scale pig farm in our county. The diagnosis and treatment are summarized below to remind farmers to pay attention to the prevention and control of this disease. 1 Disease situation The normal inventory of this pig farm was 70-80 head. Because the pig market was poor at the time, the farm owner brought in more pigs, reaching 100 head. By July, when the pigs reached about 60 kg, it was found that some pigs on the farm had broken skin, itching, and scabs, mainly
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Detailed Explanation of Fish Nutritional Requirements and Formulation Key Points
1. Nutritional requirements of farmed fish: The optimal requirement levels of major components such as protein, fat, and carbohydrates in fish feed vary depending on technical factors such as fish species, feeding habits, different growth stages, water temperature, water quality, and feeding methods. 2. Formula for compound fish feed: Several major fish feed formulas are introduced below for readers' reference. (1) Compound feed for black carp: fish meal 35%, soybean cake 47.5%, barley 15%, yeast 1%, minerals 1.5%, plus added multivitamins, feed conversion ratio 2.26.
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The layout of a goose farm requires careful consideration; only scientific planning allows for successful goose rearing
1. Site selection. The site should be close to a water source, with the water surface as wide as possible, a water depth of 1-2 m, and good water quality, and a bit far from residential areas; the soil is best if it is sandy loam, with convenient transportation and a south-facing orientation. 2. Scale determination. The production scale is determined by investment capacity, rearing conditions, technical strength, sources of goslings, and product @#@136@#@, etc. Only by achieving batch production can greater rearing benefits be obtained. 3. Overall planning. First, the buildings should be divided into a production area and an administrative area and living area, with the two areas separated by more than 50 m and separated by a wall. Production
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What are the cultivation technique requirements for oleander?
1. Site selection and land preparation: choose a warm, humid climate environment, a sunny spot, well-drained, sandy loam soil. 2. Propagation methods: oleander propagation methods are simple, with a very high survival rate; commonly used are cuttings, layering and division, water rooting, etc. (1) Cutting method: the cutting method can use either hardwood or softwood cuttings. Hardwood cuttings are done in early spring together with pruning of the seedlings; cut branches 15-20cm long, tie every 20 together, immerse in clean water at 20°C, with 1/3 immersed in the water, change the water frequently; after about 8 days the immersed part of the branches turns white and the top becomes
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Nutritional Requirements and Feeding Points for Pregnant Sows
1. Early pregnancy (within 4 weeks after mating): the embryos require almost no extra nutrition. At this time, if the sow has a large feed intake, it will increase embryo mortality, so feed intake should be restricted at this stage, with a general daily feeding amount of 1.5-2.0 kg. For weaned sows in particularly poor body condition, a little more feed can be given. The dietary nutrient levels are: digestible energy 2900-3000 kcal/kg, crude protein 14%-15%; 2. Mid-pregnancy (from 4 weeks after mating to 4 weeks before farrowing): at this stage, restrict the feeding amount according to the sow's body condition, with a daily feeding amount of 1.8
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