奶牛冬季饲养管理要点

由于北方地区冬季寒冷、气温低,较容易出现奶牛产奶量大幅度下降,致使奶牛饲养户养殖效益下滑。因此,在寒冷的季节．奶牛养殖户饲养奶牛时应注意以下几点：     

冬季饲养奶牛的饲养要点

冬季的寒冷常常造成奶牛体能消耗增大.严重影响奶牛正常的新陈代谢.因此,如何调节好奶牛饲养各环节的温度至关重要.1.冬季饲养奶牛的温度要求     

加强奶牛冬季饲养管理

冬季的来临，气温不断降低，奶牛基础代谢能消耗增加，对日粮中的净能明显感觉不足，加上奶牛冬季青绿饲料匮乏，粗饲料干枯，营养低下，奶牛体热散失增多，使产奶量下降，饲养奶牛难度就随之增大。据研究，气温在-5℃时，给奶牛以维持饲养，其净能将出现负值，在-10℃时，产奶量下降6％，这时如果饲养管理不当，就极易造成奶牛产奶量下滑，影响奶牛的正常生长发育，     

冬季奶牛的饲养管理

冬季由于天气寒冷,外界气温低,致使奶牛的热消耗增加,若此季节饲养管理措施跟不上,就会使奶牛的产奶量和饲养奶牛的经济效益受到一定程度的影响。笔者针对这一问题,并结合近年来各地在饲养奶牛生产实践中的一些好的做法与经验,将冬季奶牛饲养管理中的几个问题介绍如下。     

农户冬季喂养奶牛应当注意啥？

近年来,有些专业户饲养的奶牛,一进入冬季后,其饲养的奶牛产奶量则出现产奶量下降的非正常现象,致使饲养奶牛的经济效益受到一定程度的影响。笔者针对这一问题,并结合生产实践中的一些较好的做法与经验,现将冬季奶牛的饲养管理注意介绍如下,供参考。     

冬季奶牛饲养管理需要注意的问题

进入冬季后,由于天气寒冷,外界气温低,致使奶牛的体热消耗增加,若此季节饲养管理措施跟不上,必将使奶牛的产奶量和饲养奶牛的经济效益会受到一定程度的影响。笔者针对这一突出问题,并结合近年来各地养牛户在饲养奶牛生产实践中的一些较好的做法与经验。现将冬季奶牛饲养管理中的几个问题介绍如下。供参考。     

冬季奶牛饲养管理

气温不断下降，对于饲养户来说这直接影响奶牛的产奶量。那么冬季如何养好奶牛呢？笔者总结为10个字经验：建、勤、温、湿、精、汁、水、补、防、净。     

奶牛冬季饲养管理要点

由于北方地区冬季寒冷、气温低,较容易出现奶牛产奶量大幅度下降,致使奶牛饲养户养殖效益下滑。因此,在寒冷的季节,奶牛养殖户饲养奶牛时应注意以下几点:1提高饲粮的营养标准冬季奶牛维持需要增加,在饲料供给上要做到精粗搭     

奶牛冬季饲养管理技术要点

随着冬季来临,气温不断降低,奶牛基础代谢消耗增加,加上奶牛冬季青绿草饲料缺乏,粗饲料干枯,营养低下,这时如果饲养管理不当极易造成奶产量下滑,影响奶牛的正常发育,甚至诱发各种疾病。因此,对奶牛来说,最适宜的温度为10～16℃,加强奶牛冬季饲养管理,显得尤为重要,现将如何加强奶牛饲养管理介绍如下。     

冬季奶牛饲养管理

北方11月份中下旬气温开始下降,对于饲养户来说直接影响奶牛产奶量和奶牛生长发育。如何保持奶牛高产稳产,笔者认为应从以下几方面来加强奶牛饲养管理,提高养殖业经济效益。     

Controlled breeding of dairy cows with cloprostenol

The percentage of dairy cows that were mated and became pregnant during a 42 day breeding period was not significantly different when animals were routinely observed for estrus and mated when detected (71%, n = 56), inseminated at estrus following a single injection of cloprostenol (72%, n = 29), or inseminated at a fixed time after two cloprostenol treatments 11 days apart (69%, n = 28). However, 11 cows in the control group were not detected and mated during the breeding period and inclusion of these animals reduced the actual pregnancy rate to 60%. Results indicated that a controlled breeding program could have practical application in dairy herds but should be used with caution. Practitioners must evaluate management programs and decide, in consultation with the herdsman, if the introduction of controlled breeding technology might be advantageous.     

奶牛夏季高温的营养调控

炎热的夏季已经到来，高温的天气给奶牛生产带来很大损失。为减轻夏季高温对奶牛造成的不利影响，减少奶牛热应激现象的发生，维持产奶量的相对平衡，应从奶牛场的建设、饲养管理、疾病防治及饲料营养上采取相应的措施加以预防，尤其是奶牛的营养调控方面，会对奶牛的产奶量产生较大影响，应当引起足够的重视。     

农户饲养奶牛技术要点

随着我国经济的不断发展和人们生活水平的提高,以前主要用来滋补老人和小孩的牛奶已成为普通家庭的日常消费品,一些企业和农户纷纷投资养奶牛,奶牛养殖业逐渐得到发展。但因奶牛品种不良,养殖技术不过关,往往造成个别奶牛养殖户经济效益不好,甚至亏损。现就适合农户小规模养殖奶牛的技术要点加以说明。     

农村奶牛养殖存在的问题与对策

本文针对农村奶牛养殖生产中存在的问题,提出了自己的观点和看法,并对奶牛品种、饲料、管理等有关问题提出了一些卓有成效的建议和解决的办法,对于农村养殖奶牛具有一定的指导意义.     

现代高产奶牛饲养管理要点

强化奶牛饲养管理,根据奶牛不同阶段地生理特点,采用不同的饲养管理手段,推行先进地科学饲养管理水平,不断提高奶牛的饲养管理水平,减少疾病发病率,同时降低成本、提高产量、增加效益,对提高奶牛养殖效益至关重要。     

Disease frequencies of tied zero-grazing dairy cows and of dairy cows on pasture during summer and tied during winter

Disease frequencies of Swedish Red and White Breed (SRB) and Swedish Friesian Breed (SLB) in tied herds with zero-grazing management system and in tied herds with pasture periods are presented. Incidences are compared both with respect to season and between the two systems. Figures are given for accidents and nine different diseases.In zero-grazing cows no seasonal difference could be demonstrated except for a higher risk of ketosis and tramped teat during wintertime for SRB.Cows of both breeds kept on pasture had lower risks of dystocia, ketosis, mastitis and tramped test during this period, but an increased risk of accidents and inflammation of the hoof(s). SRB cows also had higher risks of retained placenta, parturient paresis and non-inflammatory diseases of the hoof(s) during pasture period.Comparison of year-round incidence in the two management systems revealed a higher risk of retained placenta in zero-grazing cows of both breeds and higher risk or parturient paresis in zero-grazing SRB cows. The risk of accidents was decreased in zero-grazing cows of both breeds.The relative risks of tramped teat, mastitis and diseases of the hoof(s) varied depending on the herd size distribution of the control group. Increased risk of mastitis in zero-grazing cows of both breeds and of tramped teat in zero-grazing SLB cows was found when comparing with cows from a group of mainly smaller herds with pasture feeding during summer. However, comparison with cows from a group of herds with the same herd size distribution as zero-grazing cows revealed decreased risk of tramped teat, mastitis and inflammation of the hoof(s) in zero-grazing SRB cows and decreased risk of diseases of the hoof(s) in zero-grazing SLB cows.     

成乳牛各阶段的饲养要点

我国地域疗阔,地理复杂,饲养条件和饲料资源不同,造成我国目前饲养模式不一;目前做适合我国奶牛饲养标准等基础研究工作的也比较薄弱,理论与生产实践有些脱节,大多数据是出自实验室和借鉴国外标准,而不是从规模化试验场和生产实践中得出;另外我国对现有一些比较成熟的饲养管理技术的推广也不太理想;所以我国目前的饲养模式总体比较落后,饲养管理水平低下。去年笔者对我国数百个规模不一牛场的日粮进行了分析,普遍存在对饲料的营养成分分析不到位(应每批次粗精料检测);奶牛日采食量不清;重精料,轻粗料;重蛋白,轻能量;重大宗,轻微量;重概念,轻…     

Relationship of fertility to ovarian follicular waves before breeding in dairy cows

Cows with two waves of follicular growth during the estrous cycle yield follicles that are older and larger at ovulation compared with cows having three waves. The objectives of the current research were 1) to compare fertility in cows with two or three follicular waves and 2) to examine associations between luteal function, follicular development, and fertility after breeding. Follicular waves were monitored by ultrasonography during the estrous cycle before insemination in 106 dairy cows. Fewer cows had three follicular waves before next estrus and ovulation than two waves (P < 0.01; 30% vs 68%, respectively), but pregnancy rate was higher (P = 0.058; 81 vs 63%, respectively). Cows with two waves had shorter estrous cycles (P < 0.01), with the ovulatory follicle being both larger (P < 0.05) and older (P < 0.01). In cows with three waves, luteal function was extended (P < 0.05) and the peak in plasma progesterone occurred later (P < 0.05) in the estrous cycle compared to two wave cows. Considering cows that became pregnant, luteal phase length was shorter (P < 0.05) during the estrous cycle preceding insemination than for nonpregnant cows. In conclusion, fertility was greater in lactating cows inseminated after ovulation of the third-wave follicle that had developed for fewer days of the estrous cycle as compared with two-wave cows.     

The effects of periparturient events on breeding performance of dairy cows

Many periparturient events affect breeding performance in dairy cows. These events include disorders, high early lactation milk yield, other cow factors, and calf factors. The effects range in severity from "annoying" to "devastating."     

移地朱鹮越冬期的饲养管理要点

通过对移地朱鹗越冬期实施耐受性锻炼和保温救护相结合的措施,使其更好在秦岭北麓生存和繁衍。