不同日粮对肉牛育肥效果研究

育肥牛试验选用 1 5～ 2 0周岁秦杂阉牛 2 0头 ,随机分为试验组和对照组 (P >0 0 5 ) ,试验期 60d。结果表明 ,试验组日增重 1 2 1kg/头 ,对照组 0 67kg/头 ,试验组比对照组多增加 0 5 4kg ,提高 80 % ,差异极显著 (P <0 0 1)。试验期试验组每头牛利润 185 4 4元 ,对照组每头牛利润 96 2 5元 ,试验组每头牛比对照组多收益 89 19元 ,每头牛日增利润 1 4 9元。     

不同日粮对大别山黄牛育肥效果观察

选择大别山黄牛２４头，按公母各半分４组，每组６头。分别饲喂４种不同能量饲料配制的日粮，经７７ｄ饲喂，头平日增重基本接近。玉米组、尾粉组、糠麸组和稻麦组分别为０．５９ｋｇ、０．５８ｋｇ、０．５３ｋｇ和０．５７ｋｇ。每增加１ｋｇ体重需成本分别为５．３６元、４．９７元、４．７７元和、５．４４元。说明稻麦产区的粮食及副产品可以替代玉米配制肉牛饲料。     

不同添加剂对大别山黄牛育肥效果研究

选择大别山黄牛２０头,随机分为４组,每组５头,饲喂相同日粮,其中一组作对照,试验组分别添加类氨酸（甲基脲）,磷酸脲及复合饲料添加剂。９０ｄ育肥试验头均日增重分别为０．５５ｋｇ,０．６５ｋｇ,０．５７ｋｇ及０．７２ｋｇ。类氨酸、磷酸脲及复合添加剂组分别比对照组提高１８．２％,３．６％和３０．９％,类氨酸和复合添加剂组每分斤增重成本,分别比对照组降低２２．２％和２２％,磷酸脲组比对照组增加８．９％,从     

盘江黄牛育肥效果试验

贵州盘江黄牛属地方优良品种 ,以耐粗饲料 ,适应性强 ,皮薄骨细 ,产肉性能好 ,肉质柔嫩多汁、风味独特而著称 ,每年都批量销往省内外和国际市场。但贵州黄牛长期以来是以役为主 ,其肉用价值没有充分得到开发 ,出肉率低 ,经济价值低。本次试验在盘江黄牛的育肥过程中制定不同的精料日给量 ,探索不同年龄盘江黄牛在育肥过程中的增重能力及效益 ,为提高盘江黄牛育肥效果提供科学依据。1　材料和方法1.1　试验牛的选择及处理本试验是 1998年 1月 3日～ 2月 30日在贵州省关岭县天桥牧工商公司肉牛育肥场进行。选择健康无病、个体大小相近、不同年…     

日粮中添加芒硝对生长育肥猪的增重效果

在育肥猪日粮中，添加０．２％、０．４％和０．６％芒硝的试验１、２、３组，试验全期日增重分别为６３１克、６５８克和６４４克，对照组６０３克，试验２、３组与对照组差异显著，试验１组与对照线差异不显著。饲料报酬试验１、２、３组比对照组分别提高２．９％、５．８％和４．６％，经济效益分别提高５．８％、１０．７和３％。     

育肥日粮营养水平对杂交羔羊育肥效果的影响

断奶羔羊育肥是现代养羊业中一项实用的生产技术,通过强度育肥有利于发挥杂交羔羊早期增重速度快、饲料报酬高的特点,缩短饲养期和提高经济效益.为了探讨在不同的日粮营养水平下,三元杂交羔羊的育肥效果,我们进行了试验,以期为断奶杂交羔羊的舍饲育肥技术的推广提供科学的依据.     

不同日粮组成下育成母羊饲喂效果及效益比较

为探讨饲喂苜蓿（Medicago sativa）干草、羊草（Leymus chinensis）和玉米（Zea mays）青贮与单纯饲喂玉米秸秆相比,对育成母羊增重、饲料转化效率和经济效益的影响。选取体重、年龄相近,健康的育成母羊20只,随机分成4组,每组5只,分别饲喂不同种类粗饲料日粮,精粗比为40：60。结果表明：与粗饲料单纯为玉米秸秆（100%）相比,苜蓿干草（50%）+羊草（50%）组日增重提高11.11%,饲料转化效率不明显,增收也不明显;苜蓿干草（33.3%）+玉米青贮（33.3%）+羊草（33.3%）组日增重可提高30.72%,饲料转化效率提高 18.16%,每天每只增收0.54 元;苜蓿干草（50%）+玉米青贮（50%）组日增重可提高83.01%,饲料转化效率提高 40.74%,每天每只增收可达1.91 元。表明,饲喂苜蓿干草（50%）+玉米青贮（50%）时,育成母羊增重、饲料转化效率、以及经济效益都能达到最好的状态。     

不同前后期划分对育肥蛋公雏饲养效果的影响

００只蛋公雏被分为Ａ、Ｂ、Ｃ、Ｄ４个组,每组５０只。Ａ处理生长前期为０周～３周,生长后期为４周～９周;Ｂ处理前期为０周～５周,后期为６周～９周;Ｃ处理前期为０周～７周,后期为８周～９周;Ｄ处理０周～９周均喂生长前期日粮。结果表明：以Ｂ处理日增重最快,体重最大,饲料报酬最高,经济效益最好;Ｃ处理和Ａ处理次之,Ｄ处理最差。因此育肥蛋公雏的生长前期应为０周～５周,后期为６周～９周。     

不同日粮配合对肉牛育肥效果的对比试验

为使西门达尔杂种肉牛在育肥中得到良好的效果。在相同的饲养管理条件,精饲料搭配一致的情况下,采用2种不同粗饲料进行饲喂,实施育肥。试验结果表明,饲喂青贮玉米秸秆优于饲喂氨化麦草秸秆。同时,采用3种不同日粮配方进行试验,日粮配方2日增重和综合经济效益最佳。     

不同日粮组合对羔羊育肥的增重效果

在保持同一营养水平和相同类型饲粮的前提下 ,变化部分能量饲料 (A因子 )和蛋白质饲料 (B因子 ) ,配成 4种日粮组合饲喂公羔与羯羔 (C因子 )。结果表明 ,4种日粮组合对供试羔羊均有较高的生产性能 ,日增重分别为 :0 .2 38,0 .2 5 6 ,0 .2 6 6和 0 .2 4 5kg ;A ,B因子及其交互作用对羔羊的采食量、日增重和饲料转化率的影响均不显著 (P >0 .0 5 ) ,但第 2 ,3组效果较好     

育肥牛的饲养管理方法

目前,育肥牛养殖已经成为农民致富的重要手段之一,随着人们生活水平的提高,对牛肉产品的质量要求也越来越高,因此,无论是育肥牛的良种化、饲料的优化组合、营养标准,还是饲养的规范化等方面都有待提高。笔者根据多年的自身实践,对育肥牛的饲养管理方面进行阐述,供广大养殖户参考。     

氨化麦秸饲喂育肥牛的效果试验

农作物秸秆经过氨化处理后饲喂育肥牛,增重效果十分显著,养牛的经济效益也随之提高.本试验的目的在于结合氨化麦秸饲喂育肥牛的确切效果,将麦秸更加合理的利用,以促进养殖业的发展.     

秸秆酶化育肥肉牛试验

考察玉米秸秆经酶化处理对提高肉牛增重效果和养牛业经济效益的影响。结果表明,试验期内试验组头均增重38.31 kg,对照组头均增重33.10 kg;试验组头均日增重638.50 g,比对照组头均日增重551.67 g提高15.87%,差异极显著（P〈0.01）;育肥肉牛效益提高55.60%。     

Effect of feeding Sarsaponin in cattle and swine diets

In four trials, steer calves were received in the feedlot, processed and fed diets supplemented with soybean meal (SBM), 1% urea (UR) or 1% urea plus sarsaponin (S) over a 28-d period. In trials 1 and 2, the feeding period was extended to approximately 62 d, in which steers were fed a common (SBM) diet the last 34 d. In trials 3 and 4, a SBM plus S diet treatment was included. During the first 28 d (four trial summary) daily gains of steers fed urea plus S (.74 kg) were intermediate to and significantly different from gains of steers fed SBM (.84 kg) or UR (.66 kg) diets. However, at the end of the 62-d feeding period (two trial summary) daily gains, feed intakes and feed efficiency did not differ (P greater than .05) among treatments. No significant improvements in performance were found in steers fed SBM diets supplemented with S. In swine trials, pigs were fed diets containing no additive, 63 mg S X kg-1, 55 mg chlortetracycline (C) X kg-1 or S plus C in a grower-finisher (GF) and grower (G) trial. In the GF trial, overall efficiency of feed conversion was improved (P less than .05) by feeding S or S plus C. In the G trial, daily gains and intakes were greatest for pigs fed S plus C and differed (P less than .1) from those of pigs fed S or C in the diet. Compared with feeding S or C alone, gain and intake of growing pigs were stimulated to a greater extent when S was fed in combination with C. Feeding S with or without C improved efficiency of feed conversion in finishing pigs.     

不同补饲水平对各生长阶段肉牛育肥效果的影响

选择1月龄、3月龄、1岁、2岁不同年龄段短本杂交牛各25头，放牧情况下，犊牛试验1组每头每天补饲配合饲料200g，试验2组每头每天补饲玉米200g；生长牛、育肥牛试验1组每头每天补饲配合饲料500g，拌麦麸2kg，试验2组每头每天补饲玉米500g，拌麦麸2kg。90天的补饲结果表明：不论各年龄段，均以补饲配合饲料组的增重效果和经济效益最好，补饲玉米组次之，并明显优于不补饲组。     

Long-term effects of meloxicam in the treatment of respiratory disease in fattening cattle

The long-term effects of a single dose of meloxicam (Metacam 20 mg/ml; Boehringer Ingelheim Vetmedica) in conjunction with antibiotic therapy in cattle with clinical signs of bovine respiratory disease (BRD) was evaluated in a blind, controlled, randomised study. Two hundred animals with clinical signs of brd received a single subcutaneous injection of 20 mg/kg oxytetracycline; 100 of them also received a subcutaneous injection of 0.5 mg/kg meloxicam, and the other 100 received an injection of isotonic saline. The animals were weighed before they were treated and seven, 35, 70 and 105 days later, and finally before they were slaughtered. The mean bodyweight of the meloxicam-treated animals was significantly higher from day 70 until slaughter, and the mean average daily weight gain until slaughter and the mean carcase weight of the animals treated with meloxicam were significantly higher. In the animals with lung lesions, significantly less lung tissue was affected in those that had been treated with meloxicam.     

商品育肥猪饲喂发酵玉米秸秆粉效果观察

为探讨既不影响育肥猪长长速度,又能降低饲料成本、提高经济效益的代用饲料,本试验在30头50 kg体重的商品育肥猪饲粮中添加20%的发酵玉米秸秆粉,进行60 d饲喂.结果表明:试验组比对照组每头猪饲料成本降低46.03元,纯收入增加47.73元,效益显著.     

The effects of feed additives in cattle fed forage-based diets

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Ionophores fed to cattle alter the rumen microbiome causing a metabolic shift that underlies improved animal performance. While a majority of the research into mechanisms of action were performed in cattle fed a high-concentrate diet (Thompson et al., 2016), limited information exists detailing their impact in cattle maintained on a high-forage diet. Improved animal performance is especially important in tropical and subtropical regions that are more reliant on forage-based production systems (Cooke et al., 2020). A recent study compared the effects of 3 different feed additives fed to bos indicus bulls receiving a haylage diet (Limede et al., 2021). Results provide new insight into the interplay between ionophore, breed and diet on animal performance.     

饲养模式对科尔沁肉牛育肥性能的影响

[目的]为研究饲养模式对科尔沁肉牛育肥性能的影响,特开展本试验研究,以期为农牧民提供饲养育肥牛的技术指导。[方法]选取体重体型均等的科尔沁肉牛架子牛120头,随机分为试验组1、试验组2与对照组,每组各40头。试验组1根据资料与经验制定为期185 d的饲养方案1,试验组2对养殖户自有饲养模式的饲料量与精粗配比优化后制定为期245 d的饲养方案2,对照组按照养殖户以往模式进行饲养,育肥期结束后称量体重,计算各组日增重数据。[结果]结果显示,试验组2的增重比试验组1与对照组分别提高37.2%与6.4%;试验组2与对照组的饲料利用率显著低于试验组1;经济效益方面试验组2的效益高于试验组1与对照组。结果表明试验组2为较合适的育肥牛饲养模式。[结论]试验证明,制定科学、系统的饲养模式,以合理的育肥时长、饲料摄入及精心的饲养管理,能够提高科尔沁肉牛育肥牛的育肥性能并获得更高的经济效益。