牛冬季实用养殖技术经验谈

总结近代规模化肉牛场冬季养殖肉牛的成功经验,提供了冬季肉牛养殖过程中"环境控制、饲料营养调节、常见病防治、饲喂管理"等几大核心管理技术,取得明显经济效益。     

贵州山区肉牛高效养殖技术探讨

肉牛养殖产业是贵州山区产业发展规划调整后的12个农业特色优势产业之一，发展壮大肉牛养殖产业可解决农村产业发展在扩群增量、降本增效中的瓶颈问题，为全面推进乡村振兴发展提供有力支撑。但就目前养殖情况分析来看，存在一些养殖技术上的劣势，不利于肉牛养殖产业的高效发展，因此，基于贵州山区养殖的优势，分析当前贵州山区肉牛养殖过程中存在的问题，并提出几点肉牛高效养殖的技术措施，旨在为相关从业人员提供实践参考，进一步提高山区特色化肉牛产业核心竞争力，促进贵州山区肉牛养殖业的发展。     

浅析东海县肉牛产业的发展

肉牛养殖是东海县特色畜牧产业,是农民增收致富的重要途径,分析了目前东海肉牛养殖的现状,总结好的做法,指出存在的问题,并对今后产业发展提出建议。     

肉牛健康养殖技术探讨

近年来,肉牛养殖以其稳定的市场需求、养殖风险低、抗病能力强等诸多优势成为养殖项目中的首选,肉牛养殖规模不断扩大。为了寻求更高的养殖效益,在肉牛养殖过程当中必须充分重视先进养殖技术的应用,这对实现肉牛养殖稳定的经济效益具有非常重要的现实意义。对肉牛养殖技术进行分析探讨,希望能为肉牛养殖户提供参考。     

肉牛生态养殖技术探讨

肉牛养殖是传统的优势特色产业。介绍了肉牛适宜的饲养环境,探讨肉牛繁殖及生态养殖技术,重点分析肉牛犊牛期、育成期及成年肉牛生态养殖技术,提出养殖过程中需注意事项,为肉牛养殖提供参考。     

育肥牛饲养管理技术及保健措施

育肥牛具有生长速度快、饲料转化率高、出栏快、肉质好等优点，养殖户养殖意愿高。但是在养殖过程中如果不能做好饲养管理工作，容易导致牛只生长速度慢、肉质口感差，甚至出现疾病问题。介绍了肉牛的育肥原理、养殖技术及保健措施，为肉牛的科学育肥提供参考。     

肉牛常见胃肠道疾病的防治

近年来,随着我国肉牛养殖消费市场的发展,肉牛养殖规模逐步扩大,但在养殖肉牛过程中,由于饲养管理不善、气候条件突变等因素,导致肉牛的各种胃肠道疾病频发。为了有效减少不必要的经济损失,结合多年的肉牛养殖经验,介绍了肉牛的胃肠道常见疾病的防治策略,希望能为肉牛养殖户提供参考。     

肉牛育肥养殖技术要点分析

随着人们生活水平的提高,对肉牛的需求量越来越大,肉牛养殖成为一项高收益的养殖项目。分析肉牛的养殖现状,探究肉牛育肥养殖技术的要点,以期能够提升肉牛的养殖品质,提高肉牛养殖场的经济效益。     

肉牛养殖注意事项浅谈

肉牛养殖由于受到气候变换、饲料营养、饲养管理、疾病防控等方面因素的限制,制约了肉牛养殖效益最大化和肉牛产业的健康发展,文章就冬春季肉牛养殖注意事项浅析如下,以期对养殖户有所帮助。     

肉牛养殖管理中新技术的实践探讨

科学合理的养殖管理新技术在肉牛养殖过程中发挥着重要作用,可以有效促进肉牛的健康生长和发育,提高养殖效益。主要介绍肉牛养殖管理中一些新技术的实践应用情况,为推进养殖管理活动稳步实施,提升肉牛养殖管理工作水平,增加肉牛养殖经济效益,提供一定借鉴和参考。     

赤潮与对虾养殖业自污行为初探

随着经济的高速增长,全球环境受到严重污染,海洋生态环境污染日益严重,赤潮濒濒发生,给海水养殖业、海洋生态环境、人类健康等带来极大危害。人们对赤潮的研究已开展多年,但主要集中于陆源污染物的研究,对养殖业自身污染形成的赤潮认识不足。本文主要以对虾养殖为例,对赤潮的危害、成因及预防、预测和减灾措施进行了初步探讨。     

秦巴山区仿生态培育大鲵亲本水温研究

分别对大鲵(Andrias davidanus)自然产苗点和鱼类和两栖类仿生态培育产苗点进行生境水温研究。自然产苗点水域中的鱼类和两栖类饵料丰富,常随季节、天气、河水流量的变化而波动。各出苗点水体有浊度和微量溶解固体,溶解氧含量高,水质可满足大鲵的生长繁育条件。选择连续多年批量出苗的仿生态培养池为监测对象,经过连续1年不间断的水温测定,查明了适于大鲵繁殖的水温条件。水温变幅为6.023～24.195℃,平均水温13.718℃,全年最高水温出现在秋季,最低水温出现在冬季;白昼温差较大,黑夜温差较小;全年的昼夜温差相当,适合大鲵生长,表明人工仿生态养殖环境也可实现大鲵的繁殖。     

Legal foundation and practical execution of slaughtering and meat examination of game animals

Meat regulations also involve game inspection. On the one hand the previous publications dealt with the regulations and their practice concerning game intended for slaughter, especially the control of fences and the gaining of meat. On the other hand regulations concerning game hunted for food (deer: red deer, sika deer, fallow deer, roe deer; horned ungulates: European mufflon, chamois; wild boar; European hare; European rabbit; game such as badger and raccoon) and regulations to be observed by hunters, mainly for the gaining of meat were discussed. At the beginning the following publication completes the previous ones concerning game hunted for food and later deals with the meat inspection of slaughtered game.     

天津沿海青蛤人工育苗技术研究

利用自然海水和天然饵料,采用无泥砂采苗方法,在天津沿海成功开展了青蛤工厂化育苗。幼虫初始壳长(120±1.28)μm,壳长平均日增长5.05μm,成活率23.0%;第19~31d为变态期,壳长平均日增长14.1μm,变态率32.9%;变态后至第53d,壳长平均日增长32.5μm,成活率82.3%。本次育苗试验充分利用天津沿海水质条件与环境特点,改进育苗方法,建立了适于天津海区的青蛤人工育苗工艺,共得到双水管稚贝约1.25亿枚。     

Erysipelas in the roe deer--a case report

An infection of a young male roe deer caused by Erysipelothrix rhusiopathiae with a pronounced thrombotic endocarditis in the left valves and focal necrosis in the septum of the heart leading to bacterial sepsis is described. Findings of this kind are extremely rare in roe deer. However, they document the wide host range, which is also illustrated by the numerous publications on such infections in other species.     

Legal fundamentals and practical accomplishments of abattoir and meat research in mammalian game animals

Meat regulations also involve game inspection. The previous publication mainly dealt with the regulations and their practice concerning game intended for slaughter. The following publication deals with game hunted for food (deer: red deer, sika deer, fallow deer, roe deer; horned ungulates: european mufflon, chamois; wild boar; european hare; european rabbit) and also game such as the badger and the raccoon.     

Legal regulations and practical application of studies of slaughtered game animals and their meat

Meat regulations also involve game inspection. The previous publications on the one hand dealt with the regulations and their practice concerning game intended for slaughter, especially the control of fences and the gaining of meat. On the other hand regulations concerning game hunted for food (Deer: Red deer, Sika deer, Fallow deer, Roe deer; Horned ungulates: European mouflon, Chamois; Wild boar; European hare; European rabbit; game such as Badger and Raccoon) and regulations to be observed by hunters, mainly for the gaining of meat were discussed. The recent publication regarded meat inspection (routine inspection) of slaughter game. The following publication deals with meat inspection (routine inspection) of game hunted for food and with meat inspection (additional inspection) of slaughtered game as well as game hunted for food.     

The effects of illumination and daily number of collections on fry yields in guppy breeding tanks

Substantial loss of fry to cannibalism by brood-fish occurs in live-bearing ornamental fish farms. Previous results demonstrated that fry yields in breeding tanks of the guppy fish (Poecilia reticulata) can be increased by attracting the newborns by a light stimulus into net baskets from which they are collected. In the present study the effects of the number of daily collections and timing of lighting on fry yield in breeding tanks in the laboratory were tested. No difference in fry yield was found between one and two daily collections, and no effect of the timing of lighting (lighting during the day versus during the night). Contrasting of the morning and afternoon collections within the two-collection treatment under day lighting versus night lighting revealed that more fry were collected when the collection followed the lighting period than the no-lighting period. Experiments conducted in commercial farms revealed no difference in fry yields between one and two daily collections when the baskets were illuminated, concurring with the laboratory results. The farm experiments demonstrated that without illumination there is an advantage for two collections over one collection. Taken together, the results showed that the novel method of using light to attract newborn guppies into mesh baskets have a double benefit; it increases fry yields and concurrently lessens the labor required to harvest maximal fry yields in guppy breeding tanks.     

试述皱纹盘鲍的受精作用及其精卵结合机制

皱纹盘鲍是重要的海产珍贵贝类 ,也是北方沿海鲍类人工养殖的主要品种 ,因其具有肉质细嫩、味道鲜美、营养丰富、可作为中药材等特点倍受人们重视。鲍在世界范围内的养殖面积也在不断增大 ,这就迫切需要对鲍进行人工育苗 ,以满足鲍类大批养殖的需求。因此 ,掌握鲍的受精作用及精卵结合机制将为其进行人工繁殖提供重要的理论依据 ,提高育种效率。介绍了皱纹盘鲍的精子结构、卵子结构、受精过程、精卵结合机制 ,以求为皱纹盘鲍的人工育苗技术提供理论参考。     

中国水产种业技术创新现状与展望

种业是农业发展的基础,振兴种业是保障国家粮食安全的核心要素,也是保障国家安全的重要举措。种业发展涉及政策、技术和市场等多种因素。我国水产遗传育种技术发展日新月异,但与《种业振兴行动方案》提出的要求尚有差距。本文从育种技术研究、发展与应用等角度阐述了我国水产遗传育种技术发展现状,对照《种业振兴行动方案》提出的目标与任务,从种质资源保护与利用、育种技术创新、种业生产体系建设和种苗监管等方面分析了我国水产育种技术发展存在的短板,认为我国水产养殖用种总体有保障、风险可管控,也存在国内种质资源丰富但遗传改良率不高、科研育种成果多但转化效率不高、种业企业多但核心竞争力不强等3个主要问题。针对短板,本文提出加强种质资源挖掘保存与创新利用技术研究、加强现代育种技术特别是新种质创制的研究及应用、加强生产体系技术标准化应用、加强育种技术商业化应用研究、加强种业市场监管技术支撑等建议,以期为我国水产育种技术创新攻关及种业发展政策制定提供参考。