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Introduction to Common Fish Medications, Part 3
II. Nitrofurans Nitrofurans are a class of synthetic broad-spectrum antibacterial drugs with many varieties, but only 3 to 4 are used for aquatic disease prevention and treatment. The basic structure of nitrofuran drugs is a furan ring with a nitro group attached at the fifth carbon atom. They have strong antibacterial effects; at low concentrations, they can inhibit the reproduction of many Gram-positive and Gram-negative bacteria; at high concentrations, they have bactericidal effects. Generally, bacteria do not easily develop resistance to nitrofuran drugs. Even bacteria resistant to sulfonamides and antibiotics remain relatively sensitive to nitrofuran drugs. However, nitrofuran drugs are poorly absorbed in the body and are easily and rapidly destroyed after absorption, often failing to reach effective blood antibacterial concentrations in the blood. Only in the intestinal tract can they maintain effective action, so they have a good effect in preventing and treating bacterial intestinal infections in fish. In addition, according to recent reports, nitrofuran drugs have carcinogenic effects, so their use has been restricted. At the same time, long-term use of these drugs can cause liver and kidney damage in fish.
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Introduction to the Chunyan Peach Variety and Key Cultivation Techniques
An early-ripening white-fleshed juicy peach. The fruit is round and well-formed, relatively large, with an average single fruit weight of 110 g and a maximum fruit weight of 210 g. The color is bright red, the background color is creamy white and delicate, the flesh is white, the texture is fine, and the aroma is strong. The soluble solids content is 12%-14%. It is a clingstone peach, and the fruit development period is about 62 days. Cultivation characteristics. The tree is vigorous, the tree body is robust, and the tree posture is relatively spreading. It flowers easily, with many compound flower buds, rose-type flowers, and a large amount of pollen. It has strong self-fruiting ability, bears fruit early, and is high-yielding and stable-yielding. It is suitable for open-field or protected cultivation. During protected cultivation, pay attention to increasing
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Detailed Introduction to Three High-Quality Garlic Varieties
Farmers in Zhongmu County, Henan Province, discovered a mutant plant during many years of cultivating "Soviet garlic." After years of purification and rejuvenation, they developed an improved garlic variety, later named Songcheng garlic. Songcheng garlic overcame the original variety's shortcomings of mild spiciness, many small cloves, thin and weak garlic scapes, and purple-red stripes on the outer skin, while preserving the original variety's advantage of large bulbs. This variety has now been extended to the autumn-sowing garlic regions of northern China. According to incomplete statistics, in the autumn-sowing garlic regions of China, the planting area of Songcheng garlic is over 7
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Introduction to the Huaidao 9 (Su Shen Dao 200607) rice variety
Huaidao 9, originally named "Huai 68", is a late-maturing medium japonica rice variety systematically bred by the Huaiyin Institute of Agricultural Sciences of the Xuhuai Region of Jiangsu from Huai 9712 (Yangdao 3 / 02428 // IR26 /// Zhongguo 45 / Lianjing 1), and was developed in 2000. It is suitable for planting under medium-to-high fertility conditions in central Jiangsu and the hilly areas of Nanjing, Zhenjiang and Yangzhou. Yield level and characteristics. It participated in the Jiangsu provincial regional trial from 2003 to 2004, with a two-year average yield of 586.0 kg per mu, compared with the control Wuyujing 3
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Introduction to the Wanmai 19 wheat variety, originally named Wansu 8802
Breeding institution: Suixian Prefecture Agricultural Science Research Institute, Anhui Province. Approval status: approved by the Anhui Provincial Crop Variety Approval Committee in 1994, and by the National Crop Variety Approval Committee in 1999. Variety approval number: Guoshenmai 990005. Variety source: Bo'ai 7422 / Yumai No. 2. Characteristics: semi-winter type. Seedlings semi-prostrate, strong tillering ability, plant height 85 cm. Spike square-shaped, long awns, white glumes. Grain oval, white, hard texture, 1000-grain weight 40 g
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Introduction to the Characteristics and Traits of the Zhenmai 168 Wheat Variety
Characteristics and traits: spring wheat, total growth period about 208 days, comparable to the control Yangmai 158. Seedlings semi-erect, leaf color light green, medium tillering ability, rapid polarization, relatively high spike-forming rate. Plant height about 85 cm, plant type semi-compact, spike layer relatively neat. Spike spindle-shaped, long awns, white glumes, red kernels, kernels vitreous, relatively plump. Average spike number per mu 336,000 spikes, grains per spike 35.1, 1000-grain weight 40.4 g. Cold resistance comparable to the control, relatively strong lodging resistance, good maturity appearance. Disease resistance identification: moderately resistant to fusarium head blight and sheath blight, slow leaf rust, moderately
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Detailed Introduction to the Daoguang No.1 Rice Variety
I. Breeding Institution: Tonghua Academy of Agricultural Sciences. II. Variety Origin: Bred in 1988 by crossing "Qiuguang" as the female parent with "Jingyin 127" as the male parent. Original code name Tongjing 793. III. Characteristics: 1. Plant traits: plant height 110 cm, about 16 tillers per plant, medium tillering ability, light green leaf color, flag leaves held upright, thick and sturdy stems, rice ears in the field half drooping in a ring; 2. Ear traits: ear length about 21 cm, main tiller ears uniform
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Introduction to the Huishu 003 Variety and Key Cultivation Techniques
"Huishu 003" is a new line bred by the Huize County Agricultural Technology Center over 6 years from 12,500 true seeds of 50 cross combinations, using high-generation materials with horizontal resistance to potato late blight provided by the International Potato Center. This variety is high-yielding, stable-yielding, of good quality, good eating quality, relatively strong stress resistance and wide adaptability, with a starch content of 23.0% and an average yield of 2,500 kg per mu.
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Introduction to the Characteristics and Traits of the Lidao No.1 Rice Variety
Characteristics and traits: The whole growth period is 170 days, belonging to a mid-to-late maturing variety, plant height 115 cm, panicle length 22 cm, average number of grains per panicle 120, seed setting rate around 90%, 1000-grain weight 28 g, large panicles and large grains, relatively strong tillering ability. Heading in early August, uniform heading, fast grain filling, can fully utilize the effective accumulated temperature and sunlight of September, flag leaves erect, mature with green stems and leaves. Tested by the Rice and Rice Products Quality Supervision and Inspection Testing Center of the Ministry of Agriculture, moisture 12.0%, crude protein 9.11%, amylose 17
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What varieties and types of Pinellia ternata are there? Detailed introduction
Pinellia ternata commercial products are subglobose, some slightly flattened and oblique, 1-1.5 cm in diameter. The surface is white or pale yellow, the top has a sunken stem scar, surrounded by densely distributed pitted root scars commonly called "brown eyes," and the lower part is bluntly rounded and relatively smooth. The texture is solid, the cross-section is pure white and kidney-shaped, rich in farinaceous character, odorless, pungent in taste, numbing to the tongue and irritating to the throat, and sticky when chewed. In the past, commercial Pinellia ternata was divided into many commodity types according to production area; Xufuzi: the adjacent areas of Sichuan and Yunnan, especially that produced in Zhaotong, Yunnan, is the most famous and has the reputation of "Pearl Pinellia." Nearby Leibo,
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