肥育肉牛的生产管理

3.6换料方法 为了让牛逐渐适应新的饲料,应采取逐渐更换的办法,要有3～5d的过渡期。肥育后期一般过渡7d左右,更换粗饲料时延长到10d。在饲料更换期间,要求饲养管理人员勤观察,发现异常应及时采取措施。3.7 饲料量调整时间 整个肥育阶段,一般每30d(或20d)称量体重1次,根据体重变化(增长)调整饲料日喂量。3.8 饮水及饮水量3.8.1 水的需要量 育肥牛每采食1kg饲料(干物质为基础)需饮水3～4kg。夏季天气热,应增     

肥育肉牛的生产管理

近年来,随着养牛业的迅速发展,如何进行牛的科学饲养管理,是当前养牛业提高经济效益和社会效益的关键。现将在生产实践中总结的经验介绍如下:1 选购架子牛 架子牛的优劣与肥育速度和牛肉品质关系甚大,是确保高效益的首要环节,应注意如下几个方面。     

肉牛高能日粮肥育技术

所谓高能日粮，是指每千克肉牛日粮中含有代谢能１０．９MJ以上，或日粮中精料的比例７０％以上。全粗料日粮型的架子牛从牧区运送到农区肥育场后，应在较短时间内向精料型的日粮过渡，１２０～１５０d内即可育成出栏。１恢复期１０～１５d，架子牛经过了较长距离、较长时间的运输，由于运输应激反应造成的疲劳等，需要一段时间的恢复；架子牛到农区肥育场，对农区的饲料、饲养方法、饮水条件及环境也须有个适应过程。在恢复期，日粮是干粗粮或５０％干粗粮加５０％青贮饲料为主。２过渡期１５～２０d，经过１０～１５d的恢复期饲养。架子…     

肉牛直线肥育试验报告

试验用２０头健康改良公犊进行直线肥育，从６月龄断奶体重１３５千克开始，到１６月龄出栏，平均体重达５２３．４千克。平均日增重１２５２克，其中对照组为１１７２克，试验Ｉ、Ⅱ、Ⅲ组分别为１３２５克、１２２２克和１２９２克。都显著地或极显著地高于对照组（Ｐ〈０．０１）。表明三个试验组添加瘤胃素、复合缓冲剂和纤维素酶并同时埋植增肉剂，对提高肉牛日增重有明显作用。四组牛在１６月龄时体重都超过５００千克，也说明     

高效持续肥育肉牛技术

(一)环境设施的要求牛生长适宜温度为10～25℃,因采用封闭式舍内拴养,所以要求圈舍采光、排水、通风及保温性能良好,便于实施消毒、通风换气、调节舍内温度及湿度、驱蝇灭鼠等,同时要求周围无噪声、无空气污染。(二)对入栏犊牛的要求挑选5～6月龄断奶体重在200千克左右健康的犊     

肥育期肉牛的饲养管理技术要点

肥育期肉牛饲养管理是肉牛生产的重要阶段。随着我国畜牧业的快速发展及市场对牛肉需求量的日益增加，肉牛养殖业得到了快速发展。然而，目前我国肥育期肉牛生产各地技术差别不一，特别是有些养殖场(户)缺乏技术，致使养殖经济效益偏低。为解决肉牛养殖中的技术，提高肉牛生产水平，提高肉     

肥育肉牛综合配套技术的应用

辽宁省铁岭市位于辽宁的北部,俗称“辽北”,是以产粮为主的农业地,近几年来养牛业发展很快,所辖四个县（市）均被列为“秸秆养牛示范县”,９７年牛饲养量１３０万头,出栏肉牛５７万头。养牛业的发展主要得益于黄牛改良的发展、秸秆饲料的开发和近年来推广的肥育肉牛...     

鹅蛋孵化方法及技术探讨

我国是个养鹅大国。品种资源丰富，自然条件优越，养鹅前景十分广阔。为更好地发展养鹅产业，必须先抓好鹅蛋孵化这一较为特殊的关键性环节。本文仅将鹅蛋孵化的有关问题论述如下：     

种鹅蛋的孵化管理技术要点

种鹅蛋的人工孵化逐步转为电器孵化,电孵比传统的摊床孵化优点更多,如温度均衡、干净卫生、管理方便等,缺点是设备投资稍大.如采用电器变温孵化,可以显著提高鹅蛋的孵化率.现将该技术的要点简介如下.     

温度对皖西白鹅种蛋孵化率的影响

选取存放4d的皖西白鹅种蛋5866枚,随机分为3组,在其他孵化条件相同的情况下,分别设定不同的孵化温度。结果表明:第1组受精蛋孵化率平均为75.30%,第2组平均为74.25%,第3组平均为62.85%,第1组与第2组受精蛋孵化率差异不显著,第3组受精蛋孵化率分别与第1组、第2组受精蛋孵化率均差异显著(P<0.05)。     

不同保存温度和时间对鹅蛋孵化性能的影响

为了研究不同保存温度和时间对鹅蛋孵化性能的影响,3000个四川白鹅合格种蛋随机分为5个试验组,分别在6 ℃﹑9 ℃、12℃、15℃和常温条件下保存5 d、10 d、15 d和20d,每个试验组设置5个重复,每个重复30个.结果显示:保存时间为20 d时,6℃保存的受精蛋孵化率显著高于12℃和常温(P＜0.05),极显著...     

种蛋孵化前的管理技术

1及时收集种蛋种鸡无论是笼养还是平养,一般认为每天收集种蛋4次为宜,在气温过高或过低季节每天收集5～6次。勤集蛋既能减少种蛋的破损和污染,又避免了因环境温度过高、过低而对鸡胚的不利影响。每天产出的种蛋应及时收集,产出再晚也不应留在产蛋箱中过夜。这是提高种蛋合格率和孵化率的重要措施之一。2选择合格的种蛋2.1种蛋的来源种蛋品质的优劣主要由遗传和饲养管理决定,故种蛋应来自生产性能高而稳定、受精率在90%以上、无经蛋传播的疾病、饲喂全价配合饲料和管理完善的鸡群。2.2蛋形蛋重蛋形要求正常,以卵圆形为好。过长、过圆、两头尖…     

鸭种蛋电机孵化技术

电机孵化是在现代养鸭生产中的关键环节,良好的电机孵化技术可以提供有质量保证的雏鸭,为生产奠定稳固的基础.本文就鸭种蛋电机孵化法作以下介绍:     

桑蚕卵电晕人工孵化技术研究：V.电晕处理蚕种的农村饲育

通过１９９４～１９９６年电晕处理蚕种的农村饲养，得到以下几点认识，在保证卵面消毒和排除孵化不齐因素情况下，电晕蚕种与浸酸蚕种的产量质量无显著差异，专供农用的大板电晕仪存在放电不匀，孵经不齐和孵化率欠高的问题，有待改进，电晕处理蚕种还须进行卵消毒。     

入孵种蛋的正确选择

<正>入孵种蛋的质量直接影响孵化成绩,如孵化率、健雏率和雏鸡质量,并会影响到以后雏鸡的成活率、健康状况及成鸡的生产性能,进而影响种鸡场的经济效益。因此,种蛋入孵前的严格挑选非常关键。     

骡鸡生产中不同孵化方法对种蛋孵化率的影响试验

为了探究不同孵化方法对骡鸡种蛋孵化率的影响,通过在孵化中后期采用不同凉蛋时间、恒温与变温孵化、不同湿度条件下孵化3种方法对种蛋进行孵化率比较试验.结果:在孵化中后期每天凉蛋30 min比15 min孵化率高5.8个百分点(P>0.05);变温比恒温孵化率高0.6个百分点(P>0.05);相对湿度60％～70％比55％～...     

Impact of Hatching Egg Weight and Egg Shape Index on Hatching Results in Zi Goose

This paper was aimed to study the impact of hatching egg weights and egg shape indexs on hatching of Zi goose,and then sum up the best scheme for hatching eggs screening,so as to provide scientific reference for the selection and retention of Zi goose individuals and family hatching eggs,as well as the breeding and incubation production.2469 hatching eggs of Zi geese of the second year were chosen with the weight range of 94.8 to 154.4 g and an average weight of (123.3±9.5) g;the egg shape index range was 1.24~1.63 and the average index was 1.45±0.05.Using 2 factors 4 levels test design,the weight and the shape index of eggs were divided into four levels and all the eggs were separated into 16 hatching groups.The weight and the shape index were measured and labeled on eggshells.Two hatching experiments were conducted in the same instrument and the hatching conditions were same.The results showed that:① Egg fertility rate was the highest in egg weight <118.0 g group,followed by >131.9 g group;Hatchability of fertilized eggs was the highest in >131.9 g group,followed by 125.0~131.9 g group,and the hatchability of fertilized eggs increased along with the increase of egg weight;The highest healthy chick rate of breeding egg hatching lay in 125.0~131.9 g group,followed by >131.9 g group;The highest breeding egg hatching gosling birth weight lay in >131.9 group.② When egg shape index was between 1.47 to 1.51,the egg fertility rate and healthy chick rate were the highest,followed by >1.51 group;In the group 1.47 to 1.51,hatchability of fertilized eggs was the highest,followed by 1.42 to 1.46 group.In conclusion,hatching egg weight of Zi goose had significant impact on egg fertility rate,hatchability of fertilized eggs,healthy chick rate and gosling birth weight (P<0.05),and the egg weight of Zi goose between 125.0~154.4 g was advisable;on the other hand,egg shape index also had significant impact on egg fertility rate,hatchability of fertilized eggs and healthy chick rate (P<0.05),but had no impact on gosling birth weight (P>0.05),and the egg shape index between 1.47 to 1.51 was appropriate.Egg fertility rate,hatchability of fertilized eggs,healthy chick rate and gosling birth weight were affected by interaction of egg weight and shape index.Compared with the weight of eggs,the egg shape index had greater influence on healthy geese rate.The egg shape index had no direct impact on birth weight of young geese,but it could be influenced by the interaction between the egg shape index and the weight.Thus it was not very scientific to take either the weight or the index as the only basis for choosing qualified hatching eggs.