添加沸石对肉仔鸡的饲养效果

沸石是由火山熔岩形成的,应用于畜禽养殖的天然沸石主要是斜发沸石和丝光沸石.它含有畜禽生长发育所需要的全部常量元素和大部分微量元素,这些元素均以可交换的离子状态存在,能被畜禽吸收利用.     

在肉仔鸡日粮中添加必需氨基酸和维生素的效果

提高DL-蛋氨酸、L-赖氨酸和维生素水平,探讨对肉鸡生产性能的影响,其做了四顶试验,以下分别叙述.     

发酵木薯渣粉在肉用仔鸡日粮中的利用

广西地处亚热带,是我国木薯的主要产区之一。木薯种植面积240多万亩,年产木薯50多万吨。木薯渣是淀粉和葡萄糖生产过程中的下脚料。广西有70多个淀粉和葡萄糖厂家,每年有木薯渣约7万吨,资源量较大。木薯渣因其湿度大(含水分60%左右)无法直接用于饲料生产,而且营养价值较低。堆集起来又会发热腐败,严重污染环境。如能通过微生物途径,将木薯渣发酵制成含有单细胞蛋白等多种营养成分的饲料原料,用于配合饲料的工厂化生产,不仅消除了环境污染,变废为宝,提高企业的经济效     

添加蛋氨酸替代肉用仔鸡日粮中部分蛋白质试验

一、引言肉用仔鸡饲粮属于高能量、高蛋白质、高维生素、低纤维类型饲粮,因而鱼粉、豆饼等高蛋白质饲料的用量必然偏高。但蛋白质饲料不足已成为当今世界畜牧业发展面临的共同问题。目前,氨基酸合成工业已相当发达,畜禽必需的氨基酸基本都可人工合成,因此,开发工业合成氨基酸的利用是解决蛋白质饲料不足的一个重要途径。本试验旨在探讨用工业合成的必需氨基酸—蛋氨酸     

肉用仔鸡日粮添加棕榈油饲养试验

在日粮中添加适量的饲用油脂,除提供油脂本身的高能量外,还具有(1)额外能量效应,即油脂延长了食糜在消化道中的停留时间,提高了营养物质的消化率;(2)提供动物体内一些必需脂肪酸(亚油酸、亚麻酸和花生四烯酸);(3)促进脂溶性维生素和类胡萝卜素(色素)的吸收和利用;(4)在特殊环境,尤其是在高温条件下,有助于减轻热应激对家禽生产性能的危害;(5)提高日粮的适口性,降低饲料粉尘(李巧芬,2000)。虽在日粮中添脂是昂贵的,但选择一种价格能被接受而且能发挥应有效果的饲用油脂有助于提高饲养效益。August(1999)研究认为,棕榈油总能量38.6MJ/kg,表…     

肉用仔鸡无鱼粉日粮试验

本试验用无鱼粉日粮测定了 AA 商品代肉用仔鸡的生产性能。证实用该日粮,仔鸡生长在前期的不足可在后期获得满意的补偿,表现出与含鱼粉日粮基本相同的效果(P>0.05);并可降低饲料成本6～12%(P<0.01)。     

日粮中添加蜂胶对肉仔鸡的增重效果

1蜂胶的营养成分 蜂胶是养蜂业的一种副产品,它是由蜜蜂从植物的芽胞、树皮或基于伤口处采集来的一种粘稠性分泌物(树脂与部分蜂蜡、花粉的混合物).据有关资料报道,从蜂胶中可分离出20余种黄酮化合物和其它具有生物活性的有机化合物,蜂胶中还含有镉、铁、硅、锰、镁、铝、铜、钾、钡、锌、铅等畜禽所需的微量元素.     

含10%双低菜籽饼肉鸡日粮中添加植酸酶的饲喂效果试验

选用1日龄的铁脚麻肉鸡240只,进行为期28天的饲养试验,试验日粮含10%双低菜籽饼,试验组添加600 U/kg植酸酶取代50%的磷酸氢钙,对照组不添加植酸酶。结果表明:试验组鸡群的成活率、日增重和饲料转化率比对照组有所提高,经济效益明显。     

Hatchery Feeding of Starter Diets to Broiler Chicks

This study examined hatchery feeding of starter diets differing in amino acid density and moisture on live performance measurements up to 37 d and processing measurements at 38 d. Eggs from a Cobb × Cobb 500 slow-feathering cross broiler strain were set in a common incubator and hatched. Chicks were feather-sexed, placed in 36 chick trays (25 chicks of each sex), and weighed by tray. One of 4 dietary treatments was administered (454 g/tray) in crumble form: 1) no feed; 2) feed containing 1.24% digestible Lys, 0.84% digestible TSAA, 0.80% digestible Thr, 23.2% CP, and 3,080 kcal/kg of ME; 3) feed containing 1.45% digestible Lys, 0.94% digestible TSAA, 0.84% digestible Thr, 26.0% CP, and 3,080 kcal/kg of ME; and 4) treatment 3 plus 100 mL of potable water added to the crumbles 5 min before administration in the trays. Chicks received feed treatments in trays in the hatchery, during transportation to the research facility, and in the research facility until placement (5 h of total tray feeding). Body weight gain at d 7 was increased in birds fed the high density diet alone or in combination with water as compared with birds that were fasted. Subsequent live performance, processing, and small intestine weights, however, did not differ among treatments. Lack of 37-d improvements (average 4.6-lb birds) to early feed allocation may be a result of diet composition, duration of diet allocation, and the genetic strain of bird used, because much literature has pointed to the importance of posthatch nutrition of broilers.     

日粮中添加艾叶粉饲养肉仔鸡的试验研究

7日龄肉仔鸡240只,分为3组,每组80只.1～3组鸡日粮中分别添加艾叶粉0.1%、2%,饲养至56日龄.结果,3个组平均每只增重分别为2059.79g、2156.72g和2115.57g,饲料效率分别为0.407、0.472和0.450.干物质和有机物质代谢率分别为:1组,77.93%和58.07%;2组,87.03%和69.70%;3组,81.36%和60.17%.     

大米草粉饲养蛋禽试验

通过利用大米草粉代替饲料中部分麸皮（育成阶段占饲料总量的１０％，产蛋阶段占２％）。试验表明：蛋禽在两个阶段的生产性能、健康状况及所取得的经济效益均优于对照组。     

日粮中添加整粒小麦对肉鸡生产性能、胴体指标和消化器官的影响

试验选用1日龄科宝500商品肉仔鸡2 480只,以研究在肉鸡日粮中使用整粒小麦对肉鸡生产性能、胴体指标和消化器官的影响.将试验鸡随机分为2个处理,每个处理4个重复,每栏饲养310只.肉鸡1～21日龄,对照组和试验组均饲喂相同的破碎料.22～42日龄,对照组饲喂颗粒饲料;试验组在22～35日龄和36～42日龄分别将颗粒饲料中10%和15%的粉碎小麦用整粒小麦代替,营养水平与对照组相同.试验结果表明:在肉鸡后期日粮中使用整粒小麦对生产性能影响不显著(P＞0.05);除母鸡腿肉率显著降低外(P＜0.05),饲喂整粒小麦对公鸡腿肉率、公母鸡全净膛率、胸肉率和腹脂率均影响不显著(P＞0.05);饲喂整粒小麦可以促进肌胃的发育,显著提高肌胃的相对重量(P＜0.05),对腺胃的相对重量影响不显著(P＞0.05).     

颗粒饲料和粉状饲料饲养肉鸡比较试验

采用颗粒饲料和粉状饲料对400只AA肉鸡进行饲养试验,试验分为两组,每组各200只,设一个重复.试验结果表明饲喂颗粒饲料的平均日增重为54.65 g,比粉料组的平均日增重47.67 g高出14.6%.对各周龄雏鸡活重的比较表明,颗粒饲料组极显著优于粉料组(P《0.01).但两组的死亡率无显著差异.随着日龄的增加,料重比呈现增大的趋势.粉料组的总料重比为1.87较颗粒饲料组的1.76高出6.25%,颗粒料较粉料饲喂经济效益为好.     

颗粒饲料和粉状饲料饲养肉鸡比较试验

采用颗粒饲料和粉状饲料对400羽AA肉鸡进行饲养试验。试验分为两组，每组各200羽，设一个重复。结果表明，饲喂颗粒饲料的平均日增重为54．65g，比粉料组的平均日增重47．67g高出14.6%。对各周龄雏鸡活重的比较表明，颗粒饲料组极显著优于粉料组，但两组的死亡率无显著差异。随着日龄的增加，料重比呈现增大趋势。粉料组总料重比为1.87，较颗粒饲料组的1.76高出6.25%。     

籽粒苋草粉对生长肥育猪饲养效果试验

为了寻找配合料中籽粒苋草粉的最佳用量，通过不同含量籽粒苋草粉配合料对生长肥猪的饲养对比试验，初步筛选出含有１０％籽粒苋草粉配合料的最佳配方。     

Inclusion of Buckwheat in Organic Broiler Diets

Many smaller farms in the United States are switching to organic crop production to remain competitive in an era of industrial agriculture. In doing so, they are cultivating crops not traditionally grown in the area. In the US Midwest, a popular organic crop is buckwheat. As organic corn continues to increase in price, many organic poultry farms are using alternative grains in their poultry diets, including buckwheat. Although buckwheat has been used as a livestock and poultry feed for many years, there are very few published data available on its use. The purpose of this study was to evaluate the use of buckwheat as the main ingredient in organic broiler diets. Four experimental diets were used, with varying levels of buckwheat: 0, 20, 40, and 60%. The results indicated that up to 60% buckwheat can be included in broiler diets with no significant effect on BW gain. With the 60% inclusion level, however, there was a significant decline in feed efficiency. As the price of organic corn continues to increase, the lower price for buckwheat may make it an economical substitute in organic broiler diets.     

肉鸭日粮中添加甜菜碱效果试验

试验选用1日龄樱桃谷肉仔鸭300只,随机分为A、B、C3个组,每组2个重复,每个重复50只。A组饲喂基础日粮,B、C组在基础日粮的基础上分别添加0.08%的甜菜碱、0.2%蛋氨酸。结果表明B组日增重比A组提高了11.10%(P<0.01),比C组提高了1.58%(P>0.05);B组料重比A组降低了15.10%(P<0.01),较C组降低了3.85%(P<0.01);B组的成活率与A、C组无显著差异(P>0.05);B组分别比A、C组多盈利1.56元?只、0.61元?只。