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Experimental Study on Factory-Scale Rapid Propagation Technology of Potato Test-Tube Plantlets
For many years, farmers' own propagation, self-breeding and seed retention have caused potato yields to decline year by year during production, quality to deteriorate, and commercial appearance to worsen. Scientists have proven through research that virus infection and its accumulation in tubers are the main causes of potato "degeneration." To solve the problem of severe degeneration and reduced yield of the main potato cultivars in our city, our institute made virus-free potato production a key experimental project and conducted experimental research on the problems existing in virus-free production, thereby utilizing resources and reducing production costs.
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A Case Study on the Treatment of Eimeria Infection in Adult Carp
In early April 2005, a farmer came to my clinic for a consultation. The adult carp he was raising had recently stopped feeding and begun to die. The mortality was not high; in the early stage of the disease, one fish died every three to four days, and in recent days two to three fish died per day. The disease had been present for over a month. It had been treated as enteritis, with disinfectants applied by splash for 3 to 4 days and thiamphenicol given orally for 5 days, yet the dead fish did not decrease and the condition did not improve. The dead fish appeared dark in body color with a distended abdomen; when the abdomen was pressed by hand, a white purulent substance flowed out. To confirm the diagnosis without error, the farmer was instructed to go back and bring in samples of the diseased fish for laboratory
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Detailed Experimental Study on Canned Oyster Mushroom Processing Technology
Oyster mushroom is one of the main varieties of edible fungi, belonging taxonomically to the order Agaricales, family Pleurotaceae, genus Pleurotus. Oyster mushroom cultivation involves a simple process with relatively low technical difficulty, and coupled with widely available cultivation substrates, it has become the artificially cultivated variety with the highest output and largest sales volume in China's edible fungi market. It is widely cultivated in China, especially in the north, and has become a pillar industry of local agriculture in some provinces and cities. Many farmers in impoverished areas have found a path to prosperity through oyster mushroom cultivation. It is not difficult to predict that with the
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A Preliminary Study on the Small-Water-Body Aquaculture Technique for the Liaodong sculpin
The sculpin, known by local folk names such as "xiagaizi," "xiageda," "xiapangzi," and "datouyu." It is distributed in the Dandong Yalu River and its tributaries, the upper reaches of the Biliu River, the upper reaches of the Hun River, and other waters. In the first half of 2002, Liu Yuanzhi, a farmer from Shalizhai in Fengcheng, boldly contracted the village's "drought-resistant large-mouth well," which had been built during the period of "vigorously carrying out farmland capital construction." It had been abandoned and overgrown for many years, with a shallow pit and little water, covering an area of 6 mu. Based on his family's financial capacity, he invested 4,000 yuan that year, excavated and cleared a small fish pond with a water surface of 2 mu
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A Preliminary Study on the Prevention Methods of Two Abnormal Garlic Conditions in Cangshan Garlic
Cangshan garlic is renowned worldwide for its large bulbs, thin skins, pure white and neatly arranged cloves, and its pungent, rich flavor, with excellent qualities such as aroma, pungency, and stickiness. In recent years, due to improper planting and management methods, two abnormal garlic conditions have appeared in Cangshan garlic production. One is that the garlic simultaneously produces small garlic leaves (commonly known as "little braids") when bolting, causing difficulties during the harvest of garlic scapes and affecting the yield and quality of garlic scapes. This condition accounts for 5%-10% of the total garlic. The causes are mainly two: one is excessive nitrogen fertilizer, and the other is the effect of low temperature.
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Preliminary Study on Propagation Methods and Technical Key Points of Taxus wallichiana var. mairei
Taxus wallichiana var. mairei, also known as beautiful yew, shan gongzi, and hailuo pine, is a rare evergreen tree under first-class national protection. It has a graceful form, with a purplish-red, straight trunk, and when the seeds mature they turn red, with a vividly colorful aril. It has strong regional adaptability and can be planted anywhere south of Shaanxi. This tree species prefers a humid and cool climate environment, and is suitable for growing in moist, loose, well-drained acidic to slightly acidic soil. It is a semi-shade-tolerant species; seedlings tolerate shade and grow slowly, with growth increasing after 3 years. Because it also tolerates poor soil and has strong resistance to pests and diseases, it is the preferred species for reforestation on mountain land in East China after pine species
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A Case Study on the Diagnosis and Treatment of Joint Pain Caused by Rheumatism in Dogs
At present, dog keepers generally use pen-raising and tethered-raising methods, so dogs get relatively less exercise. If they encounter adverse factors such as sudden weather changes and damp environments, dogs are prone to rheumatism. A case study on the diagnosis and treatment of rheumatoid joint pain in a dog is recorded as follows: (1) Onset and symptoms. A 6-month-old dog, weighing 7.8 kg, kept in a pen, suddenly became ill during consecutive rainy days and a damp environment. The sick dog was lame in the left forelimb and could not put it to the ground, had difficulty moving, often lay down and could not get up, and when forcibly driven, moved forward by hopping on three legs. Palpation of the sick dog's left forelimb showed pain
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Study on the Absorption Rate of Cotton to Different Doses of Mepiquat Chloride
The indeterminate growth habit of cotton and its strong plant-type plasticity determine that multiple mepiquat chloride growth-regulation treatments must be carried out during its growth period. This is especially true under the "early, dense, dwarf, film" cultivation model, where directional induction is used to shape a reasonable field structure and obtain the optimal temporal and spatial distribution of cotton bolls. This article uses large-scale spraying machinery and takes Xinluzao 23 as the subject to study the absorption rate of mepiquat chloride by cotton at different stages of growth and development as follows. 1. Selection of spraying machinery: traction power between 30 and 65 horsepower, tank volume between 1.7 and 2.2 cubic meters,
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Study and Discussion on the Extraction Process of Schisandra Extract
Hugan Tablets have the effects of soothing the liver and regulating qi, strengthening the spleen and promoting digestion, and lowering serum alanine aminotransferase. They have significant therapeutic effects on chronic hepatitis, viral hepatitis, persistent hepatitis, and early-stage cirrhosis. This product was originally a variety listed in the ministerial and provincial standards, and was later included in the 1995 edition of the Chinese Pharmacopoeia. Its testing items added "determination of schisandrin B content," but no provisions were made for the extraction process of Schisandra extract. If the Schisandra extract is still extracted according to the original material process, the extraction of schisandrin B would be unreliable. For this reason, based on the properties of schisandrin B, we designed tests using the same method with different concentrations
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Case study of silver carp and bighead carp cage culture
How many fish to stock in a cage is reasonable and correct should be determined according to the location and specific conditions. Generally speaking, in flowing water and in cages with high dissolved oxygen in the water, more can be stocked. In places with stable water, little wind and waves, and low oxygen in the water body, fewer can be stocked. In other words, the limit of stocking is when the oxygen in the cage can fully satisfy every fish. If the oxygen cannot meet the needs of the fish, it means the stocking is excessive. In fertile water (transparency of 25-30 cm), raising silver carp and bighead carp requires no feeding. Overall, the stocking amount can be based on the following
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