共查询到17条相似文献，搜索用时 321 毫秒
1.
选取30只3月龄、体重(14±2)kg的波尔×徐淮杂交山羊,随机均分至3组,以研究青贮、稻草和苜蓿不同粗饲料组合对山羊生长性能和屠宰性能的影响。3组试验羊采食的粗饲料组合分别为青贮∶稻草∶苜蓿=3∶1∶0(A组)、青贮∶稻草∶苜蓿=1∶1∶2(B组)、青贮∶稻草∶苜蓿=2∶0∶2(C组)。预试期7 d,正试期112 d。结果表明:C组羊的平均日增重、采食量和净肉重显著高于A组和B组(P<0.05),A、B组间差异不显著(P>0.05)。C组净肉率、和肉骨比显著高于A组(P<0.05),但与B组差异不显著(P>0.05)。A组饲料增重比显著高于B组和C组(P<0.05),B、C间无显著差异(P>0.05)。屠宰率、GR值和眼肌面积以C组最高,3组间无显著差异(P>0.05)。 相似文献
2.
为研究日粮中添加不同青贮饲料饲喂肉羊的效果,试验选取60只12月龄、体重相近（35.3 kg±1.5 kg）的健康荆楚黑头羊（暂定名）羯羊,随机分为4组,每组15只,A组饲粮中不添加青贮饲料（对照组）,B组添加玉米秸秆青贮,C组添加全株玉米青贮,D组添加全株玉米+饲料桑青贮。试验持续70 d,预试期10 d,正试期60 d。饲喂试验结束后,进行生长性能、屠宰性能和肉品质测定。结果表明：(1)B、C、D组羊的末重、平均日增重均显著或极显著高于A组（P<0.05,P<0.01）,而料重比均极显著低于A组（P<0.01）,C组和D组羊的平均采食量显著高于A组（P<0.05）;(2)C组和D组的宰前活重、胴体重和屠宰率均显著或极显著高于A组和B组（P<0.05,P<0.01）,而B组的胴体重和屠宰率均显著高于A组（P<0.05）;(3)各组间羊肉的p H值、剪切力、滴水损失和熟肉率以及水分、粗蛋白、粗脂肪和粗灰分含量均无显著差异（P>0.05）;(4)C组和D组的n-6/n-3值极显著低于A组（P<0.01）,而D组的饱和脂肪酸（SFA）占... 相似文献
3.
为研究不同粗饲料组合效应对育肥公羊采食量、日增重、料肉比及经济效益的影响,试验采用单因素完全随机试验设计,将体重相近的40只小尾寒羊后备种公羊随机分为8组,每组5只。基于等能等氮原则配制日增重350 g试验饲粮,其中A组日粮中粗饲料添加苜蓿,B组添加玉米秸秆,C组添加棉花秸秆,D组添加苜蓿和棉花秸秆,E组添加苜蓿和玉米秸秆,F、G、H组添加不同比例苜蓿、棉花秸秆和玉米秸秆。试验期40 d,其中预试期10 d,正式试验期30 d。结果表明:(1)G组干物质采食量极显著高于C组和D组(P<0.01),显著高于F组(P<0.05);A、B、E、H组干物质采食量极显著高于C组和D组(P<0.01);F组干物质采食量显著高于C组(P<0.05)。(2)A组日增重极显著高于C组(P<0.01),显著高于D组(P<0.05);G组日增重显著高于C组和D组(P<0.05)。(3)A组饲粮单价最高,C组单价最低,饲料单价如下趋势:A组>E组>G组>H组>F组>D组>B组>C组,饲料总成本趋势与饲料单价趋势基本相同。(4)增重收益中A组最高,C组最低,前者比后者高35.76%;经济效益G组最高,D组最低,前者比后者高34.46%。综上,在本试验条件下,以苜蓿:玉米秸秆:棉杆为12:24:13调配日粮时,经济效益最优,为265.43元/只。 相似文献
4.
试验将青蒿提取物作为饲料添加剂饲喂断奶仔猪。结果发现:试验组D平均日增重分别比对照组A、试验组B和试验组C提高了23.81%、18.18%、26.83%,差异极显著(P<0.01);对照组A、试验组B、试验组C之间差异不显著(P>0.05)。试验组D平均日采食量分别比对照组A、试验组B、试验组C提高了19.48%、15.00%2、4.32%,差异极显著(P<0.01),试验组A、B、C平均日采食量差异不显著。试验组D料重比比对照组A、试验组B、试验组C下降了3.28%2、.74%、1.67%,差异显著(P<0.05),试验组A、B、C三组之间差异不显著(P>0.05)。 相似文献
5.
试验旨在研究不同添加比例青贮杂交构树对育肥肉羊生长性能、屠宰性能及器官指数的影响,探讨青贮杂交构树替代豆粕作为蛋白质原料饲喂肉羊的可行性。试验选取体重(26.25±1.92)kg的杜泊×湖羊F1代公羊48只,随机分为4组,每组12只羊,对照组(CG组)、试验组(LG组、MG组、HG组)分别饲喂添加0%、6%、12%和18%青贮杂交构树而营养水平相同的试验饲粮,试验期90 d。结果表明:(1)CG、LG、MG、HG组间平均日采食量、料肉比、器官指数均无显著差异(P>0.05);(2)HG组屠宰率较CG组降低10.9%(P<0.05);(3)MG组增重最大,料肉比最低,增重盈利比CG组高54.37元。综上,育肥肉羊日粮中用适量青贮杂交构树替代豆粕作为蛋白质饲料是可行的,且可降低饲料成本,适宜的日粮配方可提高动物增重和饲养收益,对发展节粮型肉羊养殖业具有推广价值,本试验条件下,以添加12%青贮杂交构树经济效益最高。 相似文献
6.
为研究全株玉米青贮、全株玉米和饲料桑混合青贮对东宝黑头羊增重、屠宰性能以及育肥效益的影响,选取45只10月龄,体重(30.3±1.3)kg的东宝黑头羊,按照饲喂日粮的种类随机分为3组:对照组(玉米秸秆青贮+精料),试验Ⅰ组(全株玉米青贮+精料),试验Ⅱ组(全株玉米和饲料桑混合青贮+精料),预试验7 d,正式试验期90 d。结果显示:试验Ⅰ、Ⅱ组末重、平均日干物质采食量显著高于对照组(P<0.05);试验Ⅰ、Ⅱ组平均日增重极显著高于对照组(P<0.01);试验Ⅰ、Ⅱ组料重比显著低于对照组(P<0.05),而试验Ⅱ组显著低于Ⅰ组(P<0.05);试验Ⅰ、Ⅱ组胴体重、屠宰率显著高于对照组(P<0.05),而试验Ⅰ、Ⅱ组间无显著差异(P>0.05);试验Ⅱ组眼肌面积显著高于Ⅰ组和对照组(P<0.05),而Ⅰ组和对照组无显著差异(P>0.05);除试验Ⅰ、Ⅱ组瘤胃重量显著高于对照组(P<0.05),各组间器官重量差异均不显著(P>0.05);试验Ⅰ、Ⅱ组和对照组均盈利,按活羊出售分析,试验Ⅱ组净收益最高,按屠宰出售分析,试验Ⅰ组净收益最高。提示:日粮中添加全株玉米青贮、全株玉米和饲料桑青贮,可提高肉羊的增重性能和屠宰性能。 相似文献
7.
为研究全株玉米青贮、全株玉米和饲料桑混合青贮对东宝黑头羊增重、屠宰性能以及育肥效益的影响,选取45只10月龄,体重(30.3±1.3)kg的东宝黑头羊,按照饲喂日粮的种类随机分为3组:对照组(玉米秸秆青贮+精料),试验Ⅰ组(全株玉米青贮+精料),试验Ⅱ组(全株玉米和饲料桑混合青贮+精料),预试验7 d,正式试验期90 d。结果显示:试验Ⅰ、Ⅱ组末重、平均日干物质采食量显著高于对照组(P<0.05);试验Ⅰ、Ⅱ组平均日增重极显著高于对照组(P<0.01);试验Ⅰ、Ⅱ组料重比显著低于对照组(P<0.05),而试验Ⅱ组显著低于Ⅰ组(P<0.05);试验Ⅰ、Ⅱ组胴体重、屠宰率显著高于对照组(P<0.05),而试验Ⅰ、Ⅱ组间无显著差异(P>0.05);试验Ⅱ组眼肌面积显著高于Ⅰ组和对照组(P<0.05),而Ⅰ组和对照组无显著差异(P>0.05);除试验Ⅰ、Ⅱ组瘤胃重量显著高于对照组(P<0.05),各组间器官重量差异均不显著(P>0.05);试验Ⅰ、Ⅱ组和对照组均盈利,按活羊出售分析,试验Ⅱ组净收益最高,按屠宰出售分析,试验Ⅰ组净收益最高。提示:日粮中添加全株玉米青贮、全株玉米和饲料桑青贮,可提高肉羊的增重性能和屠宰性能。 相似文献
8.
《当代畜牧》2020,(2)
笔者通过试验研究不同能量蛋白质水平对蜀宣花牛育肥性能和屠宰性能的影响。笔者选择体重352.6±28.0 kg的健康蜀宣花牛公牛15头,随机将其分为A、B、C 3组,A组为高能量低蛋白组(HELP),B组为低能量高蛋白组(LEHP),C组为低能量低蛋白组(LELP),每组5个重复,试验期360 d。育肥结束后,按照国标《牛胴体及鲜肉分割》(GB/T 27643-2011)进行胴体分割,测定屠宰性状并评定胴体等级。结果表明,育肥开展至90 d,B组体高增加值极显著高于A组和C组(P<0.01);育肥270 d～360 d,A组的胸围显著高于B组和C组(P<0.05);A组的平均日增重分别较B组和C组高28.92%(P<0.05);A组和B组眼肌大理石花纹等级均达到了3级,而C组眼肌大理石花纹等级为2级;3组的料重比顺序为C组>B组>A组;A组的平均收益最高。研究表明,提高日粮蛋白质水平可显著增加蜀宣花牛架子牛体高,同时在育肥过程中消耗饲料较少;提高日粮能量水平可显著增加平均日增重,增加养殖收益。 相似文献
9.
选择合川本地黄牛25头,随机分为A、B、C、D、E组,每组5头,A组采用传统舍饲肥育方式,B、C、D、E组分别采用在传统舍饲基础上以不同方式补充精料的肥育方式;试验结束时,每组选2头牛进行屠宰测定。结果发现:B、C、D、E组日增重分别比A组(对照组)提高218.8%(P<0.01)、250.3%(P<0.01)、243.8%(P<0.01)、225%(P<0.01),肥育毛利润分别比A组多出8.4元/头、11.9元/头、14.4元/头、6.0元/头,屠宰性能与A组无显著差异(P>0.05)。以上结果表明:与A组相比,B、C、D、E组(特别是D组)能显著提高日增重,缩短肥育时间,增加收入,且对屠宰性能无显著影响,是合川本地黄牛低精料肥育的较好方式。 相似文献
10.
为了研究饲料中添加益生菌发酵的复方中草药制剂对肉鸭生长性能及屠宰性能的影响。采用单因素设计试验,选择体重相近的21日龄天府肉鸭360只随机分成4组,每个组3个重复,每个重复30只,A组为对照组饲喂基础日粮,试验B、C、D组在基础日粮上分别添加0.5%、1.0%、1.5%的益生菌发酵的复方中药制剂,试验期为21 d。在试验期间测定天府肉鸭生长性能指标和屠宰性能指标。结果表明:(1)C组和D组的试验末重、平均日增重分别较对照组提高5.07%、4.70%、9.85%、9. 03%(P <0.05),C组和D组的料重比分别较对照组降低9.06%、3.40%(P <0.05),B、C组和D组的平均日采食量均高于A组(P> 0.05)。(2)B组、C组和D组的屠宰率、全净膛率、半净膛率、胸肌率均高于A组(P> 0.05);C组和D组的腿肌率、瘦肉率分别较对照组提高28.00%、24.60%、12.09%、10.12%(P <0.05); C组和D组的腹脂率分别较对照组降低12. 68%、9.86%(P <0.05)。综上,1.0%添加益生菌发酵复方中草药制剂可以提高肉鸭生长性能和屠宰性能。 相似文献
11.
M H Fahmy J M Boucher L M Poste R Grégoire G Butler J E Comeau 《Journal of animal science》1992,70(5):1365-1374
Data were collected on 130 intact male lambs fed diets based on roughages supplemented with fish meal, soybean meal, or corn gluten-blood meal and slaughtered at 43 kg live weight. A nonsupplemented group served as a control. The lambs represented Romanov (R), Finnsheep (F), a new breed developed in Canada (DLS), Coopworth (C), and Suffolk (S), three first crosses of DLS with R, F, and Booroola Merino (B), and their backcrosses to DLS. Supplemented lambs consumed 16 to 22% less (P less than .05) silage than control lambs. Average daily gains of lambs fed fish meal (226 g) and corn gluten-blood meal (217 g) were higher and feed conversion ratio (4.99 and 5.11) lower than that of lambs fed soybean meal (189 g and 5.48) or control (186 g and 5.76) diets (P less than .05). The cost of feed per kilogram of gain or per kilogram of lean produced was similar in the four treatments but was between C $.23 and .65 cheaper in the protein-supplemented groups when the number of days to reach slaughter weight was considered. The effect of diet on carcass traits and meat quality were minimal. Meat of lambs fed the three protein supplements was less juicy than that of control lambs. With a few exceptions, most of the significant differences among genetic groups in growth, carcass, and sensory traits were mainly between prolific (R and F) and meat-type breeds (C, S, and DLS). Gain in weight was highest in S lambs (199 g/d), but F and R first crosses were the youngest at slaughter (196 and 198 d). The F lambs had higher dressing and kidney fat percentages than meat-type breeds. The DLS lambs had the largest longissimus muscle area (14.0 cm2), whereas C had the smallest (10.7 cm2). The B crosses had larger longissimus muscle area than R and F crosses. The R lambs had more lean and less fat in the 12th rib, whereas C lambs had the lowest lean and a high bone percentage. The toughest and the most tender roasts were those of R and B crossbred lambs, respectively. Roasts from F lambs had the most intense lamb flavor. 相似文献
12.
本试验选取4月龄洼地绵羊公羊27只,平均体重(20±0.50) kg,按随机区组原则分为3组,每组9只,以研究天然草原青干草对农区洼地绵羊生长性能、屠宰性能和经济效益的影响。试验Ⅰ组饲喂天然草原青干草,试验Ⅱ组饲喂青贮玉米秸和花生秧,试验Ⅲ组饲喂青贮玉米秸和苜蓿,饲养试验期105 d,其中预试期15 d,正试期90 d。结果表明,3个试验组间的总增重和平均日增重差异不显著;料重比试验Ⅰ组与试验Ⅱ组相比差异不显著,但试验Ⅰ组比试验Ⅱ组降低4.55%,与试验Ⅲ组相比差异显著(P<0.05),显著降低11.29%;3个试验组间体高、体长和胸围增加值差异不显著;屠宰率试验Ⅰ组比试验Ⅱ组提高1.22%,比试验Ⅲ组降低2.33%,3个试验组间差异不显著;胴体净肉率试验Ⅰ组最高,为37.83%,分别比试验Ⅱ组和试验Ⅲ组提高2.97%、1.26%,3个试验组间差异不显著;肉骨比试验Ⅰ组比试验Ⅱ组提高1.56%,比试验Ⅲ组低3.35%,3个试验组间差异不显著;3个试验组的眼肌面积大小比较接近,但试验Ⅰ组最大,分别比试验Ⅱ组和试验Ⅲ组大0.57%、7.30%;试验Ⅰ组盈利额最大,为492.15元,分别比试验Ⅱ组和试验Ⅲ多41.31和150.74元。综合研究表明,天然草原青干草对农区洼地绵羊的生长性能和屠宰性能都有促进作用,且能够提高肉羊养殖的经济效益。 相似文献
13.
《The Professional Animal Scientist》2000,16(3):182-187
Two-hundred sixty-four English-type crossbred cattle (mean initial BW 282 ± 6 kg) were used in a completely randomized design to evaluate the effects of restricted feeding and roughage source in finishing beef cattle diets. Treatments consisted of diets with 7.5% corn silage (DM basis), fed either ad libitum or restricted, and 7.5% (DM basis) corn stalks or millet hay fed ad libitum. Total DM intake was reduced by 4, 11, and 9% by restricting corn silage, corn stalks, and millet hay treatments, respectively. Average daily gain was not affected (P>0.05) by treatment, whereas feed efficiency was improved (P<0.05) for all treatments compared with corn silage diets fed ad libitum. Total feed cost of gain was highest (P<0.05) for the corn silage treatment fed ad libitum. Hot carcass weight, quality grade, and yield grade were not affected by treatment, and cattle fed restricted corn silage had a lower (P<0.05) dressing percentage. Fecal analysis of Cr concentrations indicated no difference (P>0.05) in OM, DM, or N digestibilities. However, restricted corn silage-fed cattle and cattle fed millet hay ad libitum tended to exhibit increased (P>0.05) OM, DM, and N digestibilities compared with the cattle fed corn silage ad libitum. The cattle fed corn stalks ad libitum tended to have decreased (P>0.05) OM, DM, and N digestibilities compared with the steers fed corn silage ad libitum. Fecal output was not different (P>0.05) between treatments. Restricted corn silage rations, corn stalk rations fed ad libitum, and millet hay rations fed ad libitum tended to decrease (P>0.05) fecal output by cattle compared with cattle fed the corn silage ration ad libitum. 相似文献
14.
微生物菌剂处理全株玉米青贮及花生秧添加对小尾寒羊生长性能及养分消化率的影响 总被引：1，自引：0，他引：1
本试验旨在研究微生物菌剂处理制作全株玉米青贮和花生秧添加对小尾寒羊生长性能及养分消化率的影响。试验采用2×2析因试验设计,两因素是青贮处理(NFK和ZKY菌剂青贮)、花生秧添加水平(0和17.5%)。选用3月龄、初始体重(21.38±1.26)kg的小尾寒羊公羊80只,随机分成4组,每组5个圈栏,每圈栏4只羊。结果表明:与ZKY青贮组相比,NFK青贮组干物质采食量(DMI)有升高趋势(P=0.062),羊只净收益提高了2.1%~13.3%;随着花生秧的添加,DMI显著提高(P0.05),耗料增重比(F/G)有升高趋势(P=0.064),粗蛋白(CP)、粗脂肪(EE)消化率显著降低(P0.05),中性洗涤纤维(NDF)消化率有提高趋势(P=0.094)。综上所述,NFK青贮对小尾寒羊饲喂效果(尤其是增重及经济效益)优于ZKY青贮;添加花生秧在一定范围内可增加羊只增重收益,考虑到饲料成本、饲料转化效率及经济效益,建议当日粮添加花生秧时选择NFK菌剂处理青贮,反之选择ZKY菌剂。 相似文献
15.
Feeding forage mixtures of alfalfa hay and maize stover optimizes growth performance and carcass characteristics of lambs 
下载免费PDF全文
下载免费PDF全文 A feeding experiment was carried out to determine the effects of different proportions of alfalfa hay and maize stover on the growth performance and carcass characteristics of fattening lambs. Forty‐two healthy 3.5‐month‐old male Small‐tail Han lambs of 23.89 ± 0.38 kg body mass were assigned to seven groups, which were fed mixed diets composed of maize stover and alfalfa hay containing 0%, 30%, 40%, 50%, 60%, 70% or 100% maize stover on a dry matter (DM) basis. Each lamb received 1.5 kg DM of forage mixture three times daily and supplementary concentrate (0.5 kg corn per lamb per day) for 60 days. Compared with the control forage diet of maize stover only, forage intake rate and forage conversion rate on the 40% maize stover/60% alfalfa hay mixture were 30% and 5% higher, respectively. Body weight, dressing percentage and net income were 6.7 kg, 8% and 94.37 Yuan higher per lamb, respectively. Thus, feeding lambs with a forage mixture of maize stover and alfalfa hay in a ratio of 40:60 optimized the production performance, slaughter performance, and the income derived from lambs. 相似文献
16.
This study was conducted to investigate relationships between mitochondrial respiratory chain complex activities, feed efficiency, and carcass traits in sheep. A group of Ghezel male lambs sired by a single ram were randomly allotted to individual pens. The lambs were fed ad libitum with a fattening diet containing 30% roughage (corn silage and alfalfa hay) and 70% concentrate for 70 d to individually phenotype each lamb for feed conversion ratio (FCR), adjusted FCR (aFCR), and residual feed intake (RFI). The lambs were then humanely killed and the liver, abdominal fat, pelvic fat, cardiac fat, warm carcass weight, and cold carcass weight, as well as the cross-sectional area of the LM and the fat depth over the 12th rib, were determined. A portion of LM was obtained to determine mitochondrial protein and respiratory chain complex activities (complexes I to V). Statistical analysis was carried out based on lambs exhibiting high and low RFI (n = 8), FCR (n = 8), or aFCR (n = 8) phenotypes. The lambs exhibiting the high-RFI phenotype consumed 110 g more feed daily (P < 0.05) than did the phenotype exhibiting low RFI, with no difference in ADG. Conversely, there was no difference in feed intake between the low- or high-FCR groups, but sheep exhibiting the low-FCR phenotype gained 70 g more (P < 0.05) per day compared with those exhibiting the high-FCR phenotype. It was determined that all 5 respiratory chain complex activities were greater (P < 0.05) in sheep exhibiting the low-RFI phenotype compared with those exhibiting the high-RFI phenotype, with significant (P < 0.001) negative correlation coefficients between RFI and respiratory chain complex activity. When efficiency was assessed using FCR, only activities of respiratory chain complexes III, IV, and V were less (P < 0.05) in the low-FCR phenotype compared with the high-FCR phenotype, and there were no differences (P > 0.1) in respiratory chain complex activities between groups when FCR was adjusted for metabolic BW (aFCR). There were no differences (P > 0.1) in carcass traits among any of the feed efficiency phenotypes. The results suggest that the inclusion of respiratory chain complex activities in breeding programs may be helpful in selecting for sheep exhibiting the low-RFI phenotype. 相似文献
17.
为探讨小麦全株青贮饲料的饲喂方法,以汶鑫黑猪和三元（杜×长×大）杂交猪为研究对象,通过饲养对比试验,证明小麦全株青贮饲料在中国地方猪和进口三元猪上应用的可行性。选择体重相近的汶鑫黑猪120头,分别饲喂基础日粮和用14%的小麦全株青贮饲料替代基础日粮,测定平均日采食量和平均日增重;同时,选取体重相近（60±0.16 kg）的三元（杜×长×大）猪24头,随机分为2个处理,每个处理3个重复,每个重复4头猪。试验分2个阶段,育肥前期（60~90 kg）和育肥后期（90 kg至出栏）。对照组,连续2个阶段均饲喂基础日粮,参考NRC（1998）育肥猪营养需要供给;试验组,2个阶段分别用20%和40%小麦全株青贮饲料等量替换基础组日粮。测定生猪的生产性能、屠宰性能、器官重量和肉的品质。研究结果表明汶鑫黑猪对小麦全株青贮饲料的接受度较高,不影响采食量,试验组生猪的结束重比对照组增加5.8%;添加20%小麦全株青贮饲料饲喂育肥猪阶段,对照组平均日增重和平均日采食量极显著高于试验组（P<0.01）,而试验组料重比极显著高于对照组（P<0.01）;添加40%小麦全株青贮饲料饲喂育肥猪阶段,对照组平均日增重、平均日采食量和料重比极显著高于试验组（P<0.01）,屠宰性能、肉品质低于试验组。由此证明,利用小麦全株青贮饲料饲喂汶鑫黑猪,既可以保持其优良品质,又可以节约养殖成本;饲喂添加40%小麦全株青贮饲料组生猪的生产性能高于添加20%小麦全株青贮饲料试验组,日粮中添加小麦全株青贮饲料增加了育肥猪胃和小肠的容积,提高了胴体性能和猪肉品质。 相似文献