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Occurrence and Prevention Methods of Rice Field Eel Diseases
Rice field eels live year-round in water bodies with complex environmental factors and are frequently attacked by pathogens such as viruses, bacteria and parasites. During the rearing process, sudden changes in water temperature, insufficient dissolved oxygen, excessively high water acidity, and poor feeding management, such as insufficient feed, malnutrition, or feeding rotten and spoiled feed, and deterioration of water quality, disrupt their physiological state, weaken the eel body and lower their resistance, and in severe cases often cause mass death. Even if they do not die, it directly affects the growth and development of the rice field eels. In some cases, it is also due to excessive stocking density, or
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Detailed Explanation of Techniques for Self-Breeding Rice Field Eel Fry
1. Selection and Cultivation of Parent Eels. Eels used for breeding must have a robust physique and swim actively. The body color is best in coarse black mud, yellow-brown, or black speckled, green-brown. The source of parent eels should be those caught in cages the same day with relatively small wounds. Rice field eels (Monopterus albus) have sex reversal characteristics; 1-winter-age and 2-winter-age rice field eels are basically female, and after 2-winter-age rice field eels spawn, the proportion of males gradually increases, until at 6-winter-age they are basically male. During the non-spawning season, it is difficult to distinguish male from female; generally, body length and body weight are used as standards, generally body length 37-50 cm, weight 7
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Detailed introduction to the rice variety II You Xie 8
[Basic information] II You Xie 8 is a new hybrid rice combination developed by the Crop Research Institute of the Sichuan Academy of Agricultural Sciences by crossing the high-quality, high-combining-ability, disease-resistant wide-compatibility restorer line Chenghui 448, selected from the progeny of a cross between 871028 and Iemont, with II-32A. In recent years, through trials and demonstrations in various regions (cities) of Sichuan Province, II You 448 has shown characteristics such as high quality, high yield, disease resistance, early maturity and wide adaptability. [Characteristics] This combination participated in the 1996-1997 Sichuan Province medium-indica medium-maturity group regional trial,
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Detailed introduction to the rice variety II Youming 86
Variety source: A medium indica hybrid combination developed by the Sanming Agricultural Science Institute of Fujian using II-32A x Minghui 86. Approval status: Approved in 2001 by the National Crop Variety Approval Committee. Characteristics: This combination has a plant height of 100-115 cm, a moderate plant type, medium tillering ability, vigorous growth, upright leaves, large panicles with many grains, about 160 total grains per panicle, a seed-setting rate above 80%, a 1000-grain weight of 28 grams, an average yield of about 550 kg per mu, and medium grain quality. The whole growth period is 146 days, longer than Shanyou
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Ⅱ You 92-4 Rice Variety Introduction
(1) Variety source: This variety is a new late-maturing hybrid rice combination developed by the Neijiang Hybrid Rice Development Center, the Sichuan Provincial Seed Station, and the Leshan Municipal Academy of Agricultural Sciences by crossing Ⅱ-32A with restorer line 92-4. (2) Characteristics: The full growth period is 152 days, 4.1 days longer than Shanyou 63. Plant height is 118 cm, panicle length is 25 cm, average grains per panicle is 141, seed setting rate is about 85%, and 1000-grain weight is 28 g. It is cold-tolerant at the seedling stage, with dark green leaves, vigorous growth, strong tillering ability, compact plant type, erect flag leaves, and a high panicle-setting rate. It turns yellow well in the late stage.
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Characteristics and traits of the rice variety II You 92
Breeding institution: Jinhua Institute of Agricultural Sciences, Zhejiang Province. Approval status: approved by the Zhejiang Provincial Crop Variety Approval Committee in 1994, by the Anhui Provincial Crop Variety Approval Committee in 1998, and by the National Crop Variety Approval Committee in 1999. Variety approval number: Guoshendao 990019. Variety source: II-32A//IR209/Ce64-7. Characteristics and traits: a temperature-sensitive hybrid medium indica variety. Plant height about 90 cm, compact plant type
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Detailed introduction to the rice variety II You 898
Origin: A hybrid mid-season rice variety bred by the Hubei Jianghan Plain Agricultural High-Tech Research and Development Center by crossing the male sterile line "II-32A" with the restorer line "Hui 898". It was approved by the Hubei Provincial Crop Variety Approval Committee in 2005, with the variety approval number E Shen Dao 2005002. Quality and yield: From 2003 to 2004, it participated in the Hubei Provincial mid-season rice variety regional trial. The grain quality was tested by the Food Quality Supervision and Inspection Testing Center of the Ministry of Agriculture, with brown rice rate 81.0%, head rice rate 62.2%, chalky grain rate
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Introduction to the Characteristics of the Rice Variety II You 838
Breeding institution: Sichuan Institute of Nuclear Technology Application. Approval status: approved by the Sichuan Provincial Crop Variety Approval Committee in 1995, by the Henan Provincial Crop Variety Approval Committee in 1998, and by the National Crop Variety Approval Committee in 1999. Variety approval number: Guoshen Dao 990016. Variety source: II-32A x Fuhui 838. Characteristics: a late-maturing three-line hybrid combination of medium indica rice. Plant height 115 cm, thick and sturdy stems, 17-18 leaves on the main stem, erect flag leaf, leaf sheath
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Introduction to the Characteristics and Traits of the Rice Variety II You 734
(1) Variety source: It is a new late-maturing hybrid mid-season indica combination developed by the Mianyang Agricultural Science Institute by crossing II32-8A with the disease-resistant restorer line 734 bred by the institute. (2) Characteristics and traits: II You 734 has a whole growth period of 154 days, 4 days longer than Shan 63. It has a compact plant type, good luxuriance, medium-wide leaves, a plant height of 116 cm, a panicle length of about 25 cm, a seed-setting rate of 80%, a 1000-grain weight of 2706 g, a brown rice rate of 70.9%, and a head rice rate of 51.5%. (3) Yield performance: The two-year regional trial average yield was 560 kg per mu, higher than Shan
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Introduction to the Characteristics and Cultivation Points of the Rice Variety II You 448
(1) Variety source: This variety is a new medium-maturing medium indica hybrid rice combination developed by the Crop Research Institute of the Sichuan Academy of Agricultural Sciences by crossing II-32A with Chenghui 448. (2) Characteristics: The full growth period is 145 days, 7 days longer than the control Shanyou 195. The plant height is 100.5 cm, the panicle length is 25 cm, each panicle has 142 grains, 122 filled grains, and the 1000-grain weight is 26.88 g. The glume tip is purple. The plant stems are thick and strong, with good lodging resistance. The seedling stage has vigorous growth, strong tillering ability, and many effective panicles. The leaf color is light green, the plant and leaf type is moderate, and the flag leaf
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