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Selection and Training Methods for Peach Orchard Tree Structure
In northern China, peach cultivation is mainly based on the three-main-branch cup-shaped open-center form, with each main branch usually bearing 1 or 3 large secondary branches, at a height varying from 30-70 cm, scaffold branch angles of 30-80°, and tree height varying from 2-4 m; planting methods are also not uniform. Overall, there is a lack of relatively appropriate standards. In recent years, the author investigated peach orchards in Pinggu and in Mancheng, Laoting, and other places in Hebei, and offers the following views on peach orchard tree structure for reference. 1 Selection of peach orchard tree structure 1.1 Planting method
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How to select brood rice field eels? Detailed selection methods and techniques
To select seedlings with high egg production, high fertilization rate and hatching rate, and good quality, you must choose rice field eels (Monopterus albus) of a certain age and body weight, with a strong constitution and no serious diseases or external injuries, as brood eels. In the non-breeding season, female and male eels are difficult to distinguish by appearance, so they are generally selected and retained by body length. When the body length of the rice field eel is 20 cm-35 cm, the vast majority are female eels, and when the body length is above 45 cm, most are male eels. Under normal circumstances, they can be selected and retained in a 3:1 ratio according to the above two body length groups.
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What are the precautions for selecting wild eel fry
To succeed in farming yellow eels (Monopterus albus), high-quality fry is the prerequisite. Therefore, when selecting high-quality wild eel fry, the following ten points should be noted. 1. The size of the eel fry should be appropriate. Generally, the artificial farming period is 5-6 months, and the weight gain multiple is 2-4 times. At the end of the year when selling, only individuals with a size of over 100 g can fetch a higher price. Therefore, fry stocked in April-May should weigh over 30 g. 2. Try to choose cage-caught fry. Yellow eel fry come from two sources: artificial breeding and natural capture. The number of artificially bred fry
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Introduction to the new cotton variety Runhe Selection Line No. 1
Characteristics: This variety has a growth period of 128 days, emerges well, and grows vigorously with light green leaves; it grows steadily at the bud stage, with strong lateral branch extension ability, medium-sized leaves, and strong boll-setting ability. Boll setting is uniform on the upper, middle, and lower fruiting branches, the boll-setting rate on the Y-shaped fruiting branches is high, and the yield increase potential per plant is great. The pre-frost flower rate is over 90%, the boll weight is 5.6 grams, and the lint percentage is 40.5%. The lint yield per mu reaches more than 110 kg, and in high-yield plots it reaches 150 kg. Disease resistance: This variety is highly resistant to cotton bollworm, resistant to Fusarium wilt, and resistant to Verticillium wilt, and has broad adaptability.
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Detailed Guide to Seed Selection and Seed Treatment Methods for Licorice
Seed selection: Ural licorice (Glycyrrhiza uralensis), which has higher levels of glycyrrhizic acid and glycyrrhetinic acid, was chosen. Seed treatment: licorice seeds have a hard seed coat that is impermeable to water and air, making them difficult to germinate. Untreated seeds have a germination rate of only 30%-40%, while seeds treated by breaking the seed coat can reach a germination rate of over 90%, so the seeds must be pre-treated before sowing. The method used is: soak the seeds in water at 60°C, then remove them, cover them with a damp cloth for 4 hours to 6 hours to let them absorb water and swell, then air-dry and drain them before sowing.
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Key technical points for selecting trees for log cultivation of shiitake mushrooms
In China, there are about one hundred plus tree species suitable for shiitake mushroom production, among which some tree species give relatively high shiitake yields, while others give relatively low yields. Generally speaking, trees suitable for growing shiitake mushrooms must first have bark of moderate thickness that does not shed easily, and second must be moderately solid, with little heartwood, more sapwood, and no toxic substances. From the perspective of economic value and use value, trees of Fagaceae, Hamamelidaceae, Aceraceae and Hamamelidaceae are generally ideal tree species. Those commonly used in production include Castanopsis, Castanopsis carlesii, maple, Acer, oak and Quercus dentata, etc. It should be particularly pointed out here
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How to raise meat dogs? Selecting good breeding dogs is key
To succeed in dog breeding, you must select excellent breeding dogs. In general terms, a meat dog refers to an F1 or F2 crossbred dog produced by crossing a large purebred dog with a local dog, or a dog bred by crossing F1 and F2 generations back together. The selection of the purebred male dog is especially important. Currently, the purebred male dogs selected in China include the Tibetan Mastiff, Great Dane, Saint Bernard, and others. Among them, the F1 generation of the Tibetan Mastiff is active and fierce, not suitable for group raising; the F1 generation of the Great Dane has a low meat yield. The Saint Bernard, however, as a sire line for meat dog breeding, has the following advantages: fast growth rate, adult male dogs 75-100
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What are the correct methods for selecting fishery drugs?
Aquaculture farmers should select fishery drugs or feed medication additives based on the pathogens of the cultured species and the instructions for the fishery drugs. The selected medicated feed additives should comply with the provisions of the "Regulations on the Administration of Feed and Feed Additives" (Annex 2). Drugs or additives prohibited by the state (Annex 3) must not be used, nor should feed with added antibacterial drugs be stored for long periods. Before selecting fishery drugs, the disease should first be diagnosed, and then the fishery drugs should be accurately selected by considering the drug, pathogen, environment, the cultured animal itself, and human health.
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How to choose materials for stump bonsai? Master these selection tips
Generally, plants with graceful forms, peculiar roots and trunks, brilliant flowers and fruits, strong sprouting ability, long lifespans, easy shaping, and strong resistance to adverse conditions are preferred. Plants suitable for stump bonsai are usually divided into three categories: conifers and cypresses, miscellaneous broadleaf trees, and flowering and fruiting trees. 1. Conifers and cypresses: Common excellent choices include five-needle pine, black pine, Buddhist pine, true pine, Japanese red pine, Huangshan pine, Chinese juniper, and creeping juniper. 2. Miscellaneous broadleaf trees: Materials vary from place to place. Common ones include Japanese bush cherry, Xiangfei bamboo, green-white bamboo, Buddha belly bamboo, serissa, boxwood, Chinese elm, trident maple, red maple, and banyan. These trees
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A Detailed Guide to Deer Selection Methods: How to Choose High-Quality Breeding Deer
Deer First, carefully examine the overall standard of the deer farm. When you get to the farm, first look at the number of animals kept; if it is a privately run farm with a low number of animals, inbreeding may be common. Large farms can avoid inbreeding. Second, you must choose a regular breeding farm with breeding qualifications to buy from. Selecting breeding deer is very important. First, look at the antlers. It is best to buy breeding stags during the antler growing season, when you can see at a glance whether the antlers are large or small, good or bad. If the antlers have already been sawed off, then you have to look at the appearance. The head must be large,
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