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《经济动物学报》2013,(3)
为探讨干粉饲料中添加不同比例的水分对生长期蓝狐采食量、营养物质消化率、氮代谢及生长性能的影响。试验选用平均体重(3.33±0.30)kg的约12周龄的健康蓝狐30只,随机分为3组,饲喂干粉饲料不同料水比1∶2.5(Ⅰ)组、1∶3.5(Ⅱ)组和1∶4.5(Ⅲ)组,每组10只。预试期7 d,正试期67 d。结果表明:蓝狐各周龄平均日采食量及总采食量各组间差异不显著(P>0.05);干物质消化率和脂肪消化率各组间差异不显著(P>0.05);氮表观消化率Ⅰ组显著低于Ⅲ组(P<0.05),Ⅱ组与Ⅰ、Ⅲ组差异不显著(P>0.05);蓝狐Ⅰ组的粪氮显著高于Ⅲ组(P<0.05),Ⅱ组与Ⅰ、Ⅲ组差异不显著(P>0.05);尿液量Ⅲ组极显著高于Ⅱ组(P<0.01),Ⅱ组极显著高于Ⅰ组(P<0.01);各组间尿氮差异不显著(P>0.05),但Ⅰ组的尿氮略低于Ⅱ组,Ⅱ组略低于Ⅲ组。食入氮、氮沉积、氮表观消化率和蛋白质生物学价值各组间均差异不显著(P>0.05);蓝狐1415周龄Ⅰ组和Ⅱ组的平均日增重显著大于Ⅲ组(P<0.05);蓝狐其他周龄平均日增重、各周龄的体重及总增重各组间差异不显著(P>0.05);蓝狐Ⅰ组和Ⅱ组料重比显著低于Ⅲ组(P<0.05)。由此得出,生长期蓝狐干粉饲料料水比以1∶(2.515周龄Ⅰ组和Ⅱ组的平均日增重显著大于Ⅲ组(P<0.05);蓝狐其他周龄平均日增重、各周龄的体重及总增重各组间差异不显著(P>0.05);蓝狐Ⅰ组和Ⅱ组料重比显著低于Ⅲ组(P<0.05)。由此得出,生长期蓝狐干粉饲料料水比以1∶(2.53.5)较为理想。 相似文献
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本试验的目的是为了测定在不同蛋白水平日粮中添加125mg/kg的Poultrygrow 250TM对不同时期宁都三黄鸡对营养物质消化率的影响。在三黄鸡6周龄和12周龄时,从各组中选用体重中等,健康状况良好的试鸡各5羽,进行消化试验,测定各处理组对饲料养分消化率的影响。试验发现,6周龄时,A3、A4组的干物质消化率显著高于A1、A2组(P<0.05),12周龄时,A3,A4组显著高于A2组(P<0.05),其它各组差异不显著(P>0.05)。6周龄和12周龄时,A3、A4组的氮的表观消化率均显著高于A1、A2组(P<0.05)。上述结果表明,无论是在常规蛋白水平的日粮,还是在低蛋白质水平的日粮,添加Poultrygrow 250TM均可提高宁都三黄鸡干物质消化率和日粮氮的表观消化率。 相似文献
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快慢羽基因对坝上长尾鸡早期体重与羽速生长的影响 总被引：1，自引：0，他引：1
为研究坝上长尾鸡快慢羽基因对早期体重与羽速生长的影响,对0~10周龄坝上长尾鸡体重与羽速生长进行了测定分析。结果表明,坝上长尾鸡快羽与慢羽0~10周龄体重差异不显著(P0.05),快羽鸡主翼羽和副翼羽长度在2周龄时显著大于慢羽(P0.05),随着周龄增加差异逐渐减小,育雏期末差异不显著(P0.05),8周龄慢羽鸡主翼羽和副翼羽长度显著大于快羽(P0.05)。快羽鸡1~3周主翼羽与副翼羽差异较小,随着鸡的生长差异增大,慢羽鸡1~4周主翼羽与副翼羽差异较大,随着鸡的生长差异减小,育雏期结束时,主翼羽发育优势体现出来,因此,1~4周翼羽的生长可以作为坝上长尾鸡快慢羽鉴定的辅助方法。快羽鸡在1周龄开始长出尾羽,慢羽鸡在3周龄以后开始长出尾羽,可以根据尾羽的生长情况对坝上长尾鸡进行快慢羽鉴别,鉴定时间最好控制在1~6周。 相似文献
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试验选用10周龄伊莎父母代种公鸡45羽,随机分为3组,每组15羽作为试验动物,通过在基础饲粮中添加0 mg/kg、60mg/kg、180mg/kg的锌,研究日粮锌水平对种公鸡生长性能及精液品质的影响。结果表明,日粮锌水平对种公鸡从31周龄到34周龄体重和料重比无显著影响(P>0.05),且不同周龄各组差异均不显著(P>0.05);31周龄周增重试验Ⅱ组与对照组差异达到了显著水平(P<0.05);32周龄试验Ⅱ组与试验Ⅰ组和对照组差异极显著(P<0.01);33周龄试验Ⅱ组与对照组差异也极显著(P<0.01);精子活率和生存指数差异不显著(P>0.05);试验Ⅰ组精子密度极显著高于对照组与试验Ⅱ组(P<0.01);试验Ⅰ组精液量显著低于试验Ⅱ组(P<0.01)和对照组(P<0.05);试验Ⅰ、Ⅱ组有效精子数接近(P>0.05),但试验Ⅰ组有效精子数显著高于对照组(P<0.05);精液pH值对照组极显著高于试验Ⅰ组与试验Ⅱ组(P<0.01)。 相似文献
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为研究体外加酶预消化饲料对断奶仔猪生长与养分消化率的影响,选用28日龄断奶杜长大仔猪80头,按试验要求随机分为4组,每组2个重复,每个重复10头,分别饲喂基础饲粮颗粒料(Ⅰ组)、基础饲粮预消化颗粒料(Ⅱ组)、普通加酶饲粮颗粒料(Ⅲ组)、加酶预消化饲粮颗粒料(Ⅳ组),预试期7 d,正试期28 d.结果表明,Ⅳ组仔猪日增体质量(P<0.05)和饲料转化率(P<0.05)显著高于Ⅰ和Ⅱ组,腹泻率极显著低于Ⅰ、Ⅱ和Ⅲ组(P<0.01);Ⅳ组仔猪能量和钙表观消化率均高于Ⅰ和Ⅱ组(P<0.05),但与Ⅲ组比较差异不显著(P>0.05);Ⅳ组仔猪磷表观消化率显著高于Ⅲ组(P<0.05)、Ⅰ和Ⅱ组(P<0.01),Ⅳ组粗蛋白表观消化率虽略有提升,但与其它3组相比差异不显著.加酶预消化饲料可提高断奶仔猪对饲料养分的消化,进而促进其生长. 相似文献
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旨在探讨溶菌酶(lysozyme,LYZ)基因与生长和产蛋性能的关系。本研究以京海黄鸡育种场培育的慢速J+和常速J-两个品系F2代育种群为试验材料,对鸡LYZ基因外显子进行了SNP检测,分析了LYZ基因与生长和产蛋性能的关系。结果,在京海黄鸡LYZ基因外显子1和2上发现了3个突变位点(G111A、T1426C、C1492T);统计分析表明,AA基因型个体12、16周龄体质量显著高于GG和GA基因型个体,开产日龄小于GG和GA基因型个体(P0.05);TT基因型个体4、8周龄体质量和开产体质量显著低于其他基因型个体,而TN基因型个体4、8周龄体质量和开产体质量显著高于其他基因型个体(P0.05);不同单倍型在4～16周龄体质量和开产体质量差异显著(P0.05);群体遗传学分析表明,3个突变位点的基因型在两品系间差异显著(P≤0.05)。初步推断鸡LYZ基因可能是控制京海黄鸡生长发育的主基因或与主基因紧密连锁。 相似文献
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去盲肠鸡与正常鸡对大米粉氨基酸消化率的比较研究 总被引：2，自引：0，他引：2
选择18周龄黄羽肉鸡,去盲肠成年公鸡和正常成年公鸡各9只,探讨去盲肠与正常黄羽肉鸡对大米粉氨基酸消化率的影响。结果表明,大米粉中氨基酸表观消化率去盲肠鸡普遍高于正常鸡,丙氨酸、亮氨酸和赖氨酸差异显著(P<0.05);大米粉中氨基酸的真消化率亦普遍表现为去盲肠鸡高于正常鸡,丙氨酸差异显著(P<0.05),酪氨酸差异极显著(P<0.01)。大米粉的总氨基酸表观消化率和真消化率在两种试鸡间差异不显著(P>0.05)。去盲肠鸡的内源氨基酸排泄量大多数测值高于正常鸡,但差异不显著(P>0.05)。本试验建议用正常鸡的测定值表示黄羽肉鸡对大米粉的氨基酸消化率。 相似文献
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《饲料研究》2017,(19)
试验选择120羽生长健康和同一批次的南丹瑶鸡鸡苗,随机分成4组,每组3个重复,每重复10羽。各试验组除饲养的时间不同外,其基础日粮和营养水平均一致,预饲期为7 d,预饲期结束时记录每组初始体质量。4组的饲养周期分别为16、22、26和28周,每组饲养结束时测定记录南丹瑶鸡的体质量、平均日增质量、平均日采食量、料重比及肌肉pH、肉色、系水率和剪切力。研究表明,不同生长周期对南丹瑶鸡的胸肌肉品质有显著影响(P0.05),在肉色方面,16周龄的南丹瑶鸡颜色显著深于28周龄(P0.05);在系水率方面,16周龄的南丹瑶鸡的系水率最佳,显著高于22周龄(P0.05),26与28周龄间没有显著差异(P0.05);在pH方面,16周龄的南丹瑶鸡显著高于28周龄(P0.05),与其他2组未形成显著差异(P0.05);在剪切力方面,26与28周龄的南丹瑶鸡极显著高于16周龄(P0.01),显著高于22周龄(P0.05)。不同生长周期对南丹瑶鸡的腿肌肉品质有显著影响(P0.05),在系水率方面,16周龄的南丹瑶鸡极显著高于其他组,系水效果较好,嫩度强(P0.01);在pH方面,16周龄的南丹瑶鸡显著高于28周龄(P0.05),与其他2组差异不显著(P0.05);在剪切力方面,22、26与28周龄的南丹瑶鸡间差异不显著(P0.05),但显著高于16周龄(P0.05)。结果表明,16周龄的南丹瑶鸡胸肌和腿肌的肉色、pH、系水率和剪切力是最佳的,但是26周龄的南丹瑶鸡的生长性能较好,产生的经济效益最高。 相似文献
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The experiment aimed to study the difference on the dietary nutrient digestibility of different genetic basis beef cattle during two nutrient levels.Forty-eight heads of different genetic basis beef cattle （Charolais×Simmental-crossbred cattle,Gelbvieh×Simmental-crossbred cattle,Angus×Simmental-crossbred cattle and Limousin×Simmental-crossbred cattle) were introduced，feeding two different nutritional level of diets，adopting 4×2 two factor design，and carrying on the seven days of digestion experiment using endogeny indicator method.The results showed as follows：①From genetic basis，crude protein digestibility in Gelbvieh×Simmental-crossbred cattle was significantly higher than that in Angus×Simmental-crossbred cattle (P＜0.05)，and extremely significantly higher than that in Limousin×Simmental-crossbred cattle（P<0.01）, crude fat digestibility in Gelbvieh×Simmental-crossbred cattle was extremely significantly higher than that in Charolais×Simmental-crossbred cattle and Angus×Simmental-crossbred cattle (P＜0.01).②From nutritional level，the nutrient digestibility of beef cattle in feeding a high nutrition diet were extremely significantly higher than that in feeding a low nutrition diet (P＜0.01).③From the interaction of genetic basis and nutritional level，nutrient digestibility decreased with the increase of nutritional level of diet in Charolais×Simmental-crossbred cattle,Angus×Simmental-crossbred cattle and Limousin×Simmental-crossbred cattle，while Gelbvieh×Simmental-crossbred cattle were on the contrary.The results indicated that genetic basis had significant influences on crude protein digestibility and crude fat digestibility （P＜0.05），nutritional level of diet had significant influences on the digestibility of dry matter，organic matter，crude protein，crude fiber，crude ash and crude fat （P＜0.05），crude protein digestibility were influenced significantly by genetic basis and nutritional level of diet at the same time （P＜0.05）. 相似文献
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Feces from 15 adult llamas were collected in 4 herds and the exact diet was determined, either of the group or of individual animals, to examine apparent digestibility. A questionnaire was submitted to the animal owners. The questionnaire included questions about the animals in the herd (number, age, gender, origin), management methods, pastures, watering and feeding facilities for the animals, hay supplementation, composition of the ration and fodder additives used. Analysis of the feed revealed an average apparent digestibility for dry matter of 81+/-4%, for the organic matter 77+/-7%, for crude protein 69+/-10%, for nitrogen-free extract 83+/-5%, for calcium 60+/-17%, for phosphorus 54+/-11% and 81+/-9% for crude fiber. All feed components seem to be digested similarly to domestic ruminants whereas the apparent digestibility of crude fiber was high, which indicates that the digesting system seems to be more effective. 相似文献
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本试验旨在研究不同组合益生菌对育成期水貂生长性能和营养物质消化率及氮平衡的影响。选择96只60日龄、健康状况良好的水貂,随机分为4组,每组24只,公、母各半。对照组饲喂基础日粮,试验1、2、3组分别在基础日粮中添加0.06 g地衣芽孢杆菌+0.06 g枯草芽孢杆菌、6 g安琪酵母+12 mL乳酸菌、0.06 g地衣芽孢杆菌+0.06 g枯草芽孢杆菌+6 g安琪酵母+12 mL乳酸菌。在水貂育成期内进行饲养与消化代谢试验,分析不同组合益生菌对水貂平均日采食量、平均日增重、料重比、粗蛋白质和粗脂肪的消化率及沉积氮、蛋白质生物学价值和净蛋白质利用率的影响。结果表明,与对照组相比,试验1组公貂的干物质消化率和试验2组公貂的脂肪消化率显著下降(P<0.05),但不同组水貂的生长性能和氮平衡及母貂的营养物质消化率未受到益生菌的影响(P>0.05)。提示,日粮中添加益生菌不会显著改善育成期水貂的生长性能、营养物质消化率及氮平衡,故在水貂健康的前提下,无需在育成貂日粮中添加益生菌。 相似文献
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Kongmanila D Bertilsson J Ledin I Wredle E 《Tropical animal health and production》2012,44(7):1659-1665
The effect of feeding different levels of foliage from Erythrina variegata on the performance of growing goats was studied using a local breed (Ma T'ou) with an average initial body weight of 11.2?kg (SD?=?0.9). Twenty-four animals were allocated to a randomized design, with six animals (three males and three females) per treatment. The treatments were four different levels of replacement of the diet crude protein (CP) with CP from Erythrina foliage (EF) at 0?% (E-0), 20?% (E-20), 40?% (E-40), and 60?% (E-60). There were no significant differences in the dry matter (DM) intake between treatments, but total CP intake was significantly higher in the goats fed the diet E-60 compared to E-20 (61.1 and 51.4?g/day, respectively). The average daily liveweight gain of the goats did not differ between treatments and ranged from 51 to 63?g/day. Sixteen animals were kept in metabolism cages for a digestibility study and given with the same four diets as in the main experiment. The digestibility of DM, organic matter, neutral detergent fiber, and acid detergent fiber was significantly higher for diet E-60 than for E-0. Neither the apparent digestibility of CP and N retention nor carcass characteristics (16 animals) differed with an increase in the level of CP from EF in the diets. In conclusion, CP from EF can replace up to 60?% of CP from a mixed diet with soybean meal without any negative effect on the growth in goats. 相似文献
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1. Two experiments were conducted to determine the effects of level of inclusion of poultry by-product and enzyme-prebiotic supplementation on grower diet digestibility and the performance of broilers. 2. Six grower diets were formulated to provide a similar nutrient profile with the exception of using three graded levels of poultry by-product, namely 0, 25, 40 g/kg of the diet with and without supplementation of enzyme preparation at the rate of 1 kg per tonne of feed and prebiotic preparation at the rate of 2 kg per tonne of feed. The experimental diets were used from 3 to 6 weeks of age. 3. Body weights, feed intake and feed conversion efficiency were not affected by poultry by-product; however, enzyme-prebiotic had a significant positive effect on feed conversion efficiency at 0 to 6 weeks in experiment 1. 4. Crude protein digestibility was decreased by feeding the diet containing poultry by-product while ether extract digestibility was increased by poultry by-product at the rate of 25 g per kg of feed only. Dry matter retention, crude fibre digestibility and organic matter retention were not affected by poultry by-product. Dry matter and organic matter retentions, crude protein, ether extract and crude fibre digestibilities were not affected by enzyme-prebiotic. 5. Protein efficiency ratio (PER) values were increased by poultry by-product at the rate of 40 g per kg of feed and addition of enzyme-prebiotic. 相似文献
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肉牛不同生长阶段日粮营养物质表观消化率的比较 《畜牧与饲料科学》2021,42(6):9-12
[目的] 比较不同生长阶段肉牛日粮营养物质表观消化率和日增重,为肉牛养殖日粮配合提供参考。[方法] 按月龄和体重随机选择两组西门塔尔杂交牛,12~15月龄、体重250~300 kg为小体重组,15~18月龄、体重350~500 kg为大体重组,每组10头。日粮根据肉牛体重变化调整,正式试验期分为试验前期和试验后期。以不溶盐酸灰分（AIA）作为内源指示剂,利用点收粪法测定日粮营养物质表观消化率。[结果] 小体重组肉牛在整个试验期的总增重和平均日增重与大体重组肉牛差异显著（P<0.05）;试验前期,小体重组肉牛日粮有机物（OM）、粗蛋白质（CP）、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）、淀粉和能量的表观可消化量与大体重组肉牛差异显著（P<0.05）,而OM、CP、NDF、ADF、淀粉和能量的表观消化率与大体重组肉牛无显著（P>0.05）差异。[结论] 在试验日粮组成条件下,选取的2个饲养阶段肉牛日粮的营养物质表观消化率没有明显差异,可消化营养物质进食量的增加可提高日增重。 相似文献
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本文旨在研究日粮不同代谢能和粗蛋白质水平对合浦鹅日粮干物质、粗蛋白质、粗脂肪、粗纤维、钙和磷等养分的消化率及生长性能的影响.将120只28日龄的合浦鹅随机分成6个组,进行2个饲养和消化试验:试验1组饲喂粗蛋白质水平为15.10%,代谢能水平分别为10.03、11.00和11.85 MJ/kg的3种日粮;试验2组饲喂代谢能水平为11.50 MJ/kg,粗蛋白质水平分别为12.50%、14.85%和17.83%的3种日粮.用4 mol/L HCI ALA方法测定日粮的养分消化率.结果表明:粗蛋白质水平为15.10%和代谢能水平为10.03 MJ/kg的日粮,具有较高的养分消化率,但不同代谢能水平对试鹅的生长性能影响差异不显著(P>0.05);代谢能水平为11.50 MJ/kg和粗蛋白质水平为12.50%的日粮也具有较高的养分消化率,但不同粗蛋白质水平对试鹅的生长性能影响差异也不显著(P>0.05).因此,28日龄以后的合浦鹅的日粮粗蛋白质和代谢能水平分别为15.10%和10.03 MJ/kg,或分别为12.50%和11.50 MJ/kg时,均具有较高的养分消化率,但对合浦鹅的生长性能无显著影响. 相似文献