日粮粗纤维水平对35～70 d定安鹅生产性能及器官指数的影响

为研究日粮粗纤维水平对定安鹅生产性能及器官指标的影响,试验选取遗传背景一致、体重相近[(1384.33±0.76)g]的28d定安鹅120只,随机分为3个处理组,每个处理组设4个重复,每个重复10只。分别饲喂粗纤维水平为4.29%、5.29%和6.29%的日粮。试验期为35d。结果表明:(1)5.29%粗纤维组末重和日增重较6.29%粗纤维组分别提高13.57%和27.95%(P<0.05);5.29%粗纤维组采食量比4.29%和6.29%粗纤维组提高5.72%和7.95%(P<0.05);5.29%粗纤维组料重比较6.29%粗纤维组降低16.05%(P<0.05)。(2)5.29%粗纤维组屠宰率、半净膛率、腿肌率和胸肌率分别比4.29%和6.29%粗纤维组分别提高1.64%和2.28%、0.38%和1.03%、0.51%和9.45%、4.31%和6.84%(P>0.05)。腹脂率随着粗纤维水平的提高有下降的趋势(P>0.05)。(3)与4.29%和6.29%粗纤维组相比,5.29%粗纤维组心、肝、胃、肌胃及脾脏指数分别提高5.31%和2.43%、6.15%和5.03%、10.45%和7.29%、11.45%和7.94%、1.65%和2.50%(P>0.05)。综合认为,5.29%粗纤维可使35~70d定安鹅获得较优的生产性能。

日粮代谢能对1～4周龄定安鹅生长性能及血清生化指标的影响

为研究日粮代谢能对1~4周龄定安鹅生长性能及血清生化指标的影响,选取遗传背景相同、体重相近(90.57±0.70)g的1日龄定安鹅240只,随机分为4个处理组,每个处理组设4个重复,每个重复15只。分别饲喂代谢能水平为10.49 MJ/kg、11.02 MJ/kg、11.54 MJ/kg和12.05 MJ/kg的日粮。试验为期28 d。结果表明:(1)11.54 MJ/kg代谢能组末重和日增重均显著高于10.49 MJ/kg代谢能组(P<0.05),而料重比显著低于10.49 MJ/kg和11.02 MJ/kg代谢能组(P<0.05)。(2)11.54 MJ/kg代谢能组总蛋白和球蛋白含量都显著高于10.49 MJ/kg和12.05 MJ/kg代谢能组(P<0.05),白蛋白含量也显著高于11.02 MJ/kg和12.05 MJ/kg代谢能组(P<0.05)。但11.54 MJ/kg代谢能组尿酸含量显著低于10.49 MJ/kg代谢能组(P<0.05)。综合认为,11.54 MJ/kg代谢能日粮可使1~4周龄定安鹅获得较好生长性能,血清生化指标也得以改善。

Effects of Dietary Crude Fiber Levels on Growth Performance and Serum Biochemical Index of Dingan Geese Aged from 35 to 70 Days

[Objective] The study was carried out to investigate the effects of dietary crude fiber on growth performance and serum biochemical in-dex of Dingan geese aged from 35 to 70 days.[Method] A total of 120 Dingan geese on day 28 with the same genetic background and similar initial weight(1 384.83.73±0.76 g) were randomly assigned into 3 groups, with 4 replicates per group and 10 geese per replicate. Geese were fed the diets containing 4.29%, 5.29% and 6.29 % crude fiber, respectively. The experiment lasted 35 d.[Result] Final weight and daily gain of 5.29 %CF group were significantly higher than those of 6.29 % CF group(P<0.05);Feed intake was markedly higher than those of 4.29% and 6.29 % CF groups(P<0.05);Feed gain ratio was significantly lower than that of 6.29 % CF group(P<0.05). Compared with 4.29% and 6.29 % CF groups, serum albumin concentrations of 5.29 % CF group increased significantly(P<0.05), while serum total protein and globin contents were higher(P>0.05), but serum uric acid level was lower(P>0.05).[Conclusion] 5.29 % crude fiber could lead to higher growth performance of Dingan geese.

Effects of Crude Fiber Levels on Production Performance, Organ Index and Serum Biochemical Parameters of Dingan Geese Aged from 1 to 28 Days

[Objective]The paper was to investigate the effects of dietary crude fiber level on production performance,organ index and serum biochemical parameters of Dingan geese aged from 1 to 28 days.[Method]A total of 144 1-day-old Dingan geese with the same genetic background and similar initial weight(88.75±0.21g)were randomly assigned into 3 groups with 4 replicates per group and 12 geese per replicate,and fed with the diets containing 2.56%,3.52% and 4.48% crude fiber,respectively.The trial lasted 28 d.[Result]1)The final weight and daily gain of 3.52% CF group were significantly higher than those of 2.56% CF group(P<0.05);the feed/gain ratio was markedly lower than that of 2.56% CF group(P<0.05).2)The slaughter rate,semi-eviscerated rate and leg muscle rate of 3.52% CF group were higher than those of 2.56% and 4.48% CF groups(P>0.05).3)As the dietary crude fiber levels rose,the abdominal fat rate showed a downward trend(P>0.05).4)The liver index of 3.52% CF group was significantly higher than that of 2.56% CF group(P<0.05).4)Compared with 2.5%and 4.48% CF groups,the serum albumin concentrations of 3.52% CF group markedly increased(P<0.05),the serum total protein and globin contents were higher(P>0.05),but the serum uric acid level was lower(P>0.05).[Conclusion]When the crude fiber level was 3.52%,the production performances of Dingan geese aged from 1 to 28 days were better,and the liver index and serum albumin level could be obviously improved.

Isolation and PCR Identification of Duck Tembusu Virus

Duck tembusu virus disease is one of the most serious infectious diseases endangering duck industry. A strain of virus was isolated from a dead duck,and performed PCR identification and sequence analysis. The results showed that the sequence of the isolate shared above 99% homology with duck tembusu virus( DTMUV) sequence on Gen Bank. The result indicated that the isolated virus was DTMUV.

Comparison of Immune Effect of Four Commercial Marek's Disease Vaccines in Wenchang Chicken

Marek＇s disease（MD） is a lymphoproliferative disease of domestic chickens caused by a highly infectious,oncogenic alpha-herpesvirus known as Marek＇s disease virus（MDV）.The aim of this study was to compare the efficacy of four commercial MDV vaccines in Wenchang chicken.The 1-day old Wenchang chickens tested were injected with one of four different vaccines or not unvaccinated as control;five days later,they were then challenged by virulent MDV strain MD5.The results showed that,in comparison with HVT vaccines,the CVI988 vaccine gave the immunized chickens more potent immunities against challenges of MDV strain MD5.

嘉积鸭地面平养、网床平养与网床加发酵床平养对比试验

为研究不同饲养方式对嘉积鸭饲养效果的影响,试验选择健康嘉积鸭900只（公母各半）,随机分为3组,分别进行地面平养、网床平养和网床加发酵床平养,试验期91 d,测定其生产性能、体尺指标、屠宰性能、肌肉品质和经济效益。结果表明：在海南地区无论公鸭还是母鸭,91日龄时网床平养较地面平养平均日增重显著提高（P〈0. 05）,料重比显著降低（P〈0. 05）,成活率显著提高（P〈0. 05）;全净膛率、胸肌率、腿肌率、腹肌率及肌肉品质各组间均差异不显著（P〉0. 05）;经济效益网床平养最高,每只鸭毛利润分别较地面平养和网床加发酵床平养增加6. 2元和5. 5元。说明海南地区嘉积鸭最优的饲养模式为网床平养。

嘉积鸭生长性能的测定及相关分析

为了掌握嘉积鸭的生长特点和肉用特性,更好地对嘉积鸭进行开发和利用,试验选择90日龄嘉积鸭30只（公、母鸭各半）,测定了体重、体尺和屠宰性能指标,并进行了相关性分析。结果表明：嘉积鸭公鸭活体重极显著高于母鸭（P〈0.01）,公鸭体尺性状明显高于母鸭。嘉积鸭母鸭主要屠宰性能指标（如屠体重、全净膛重、半净膛重）与体尺指标中的龙骨长、骨盆宽和胫长相关性较强;公鸭主要屠宰性能指标（如屠体重、全净膛重、半净膛重）与体尺指标中的胸深、骨盆宽和胫围相关性较强。

不同鹅品种(系)生长曲线分析

为了研究定安鹅及其杂交后代的生长规律,为其提供更科学的饲养方案,以满足其各阶段不同生长发育需要,发挥最大生产性能,试验选取定安鹅、浙定F1代(浙东白鹅♂×定安鹅♀)、阳定F1代(阳春鹅♂×定安鹅♀)公母鹅各50只,相同饲养管理条件下分别测定其每周体重,并采用Gompertz非线性生长模型对其生长发育曲线进行拟合。结果表明:定安鹅及其杂交后代生长发育曲线与Gompertz模型拟合良好,拟合度在0.99以上;定安鹅与浙东白鹅及阳春鹅的杂交后代生长性能较定安鹅均有较大提升,生长周期也明显缩短。说明用Gompertz模型进行定安鹅及其杂交后代生长发育曲线拟合可作为研究其生长发育规律的参考。

中草药在琼中山鸡健康养殖中的应用效果研究

为了探讨中草药在琼中山鸡健康养殖中的应用效果,试验选取1日龄琼中山鸡800只,随机分为试验组和对照组,对照组山鸡全程饲喂普通基础日粮,试验组山鸡于第5周开始在基础日粮中添加1%的中草药保健剂(含穿心莲、鱼腥草、麻杏石甘等成分)进行饲养试验,每周最后一天试验鸡空腹称重,计算日增重,17周龄时抽取活鸡送检,测定鸡肉中有毒有害物质含量,分析养殖经济效益。结果表明:5~6周龄时试验组山鸡体重显著低于对照组(P<0.05),7~17周龄时试验组山鸡体重超过对照组,但无显著差异(P>0.05);试验组山鸡日增重1~6周龄时低于对照组,7~17周龄时高于对照组;除铅含量外,对照组和试验组山鸡肉中主要有毒有害物质均未检出,且试验组山鸡肉中铅含量低于对照组;试验组山鸡的死淘率显著低于对照组(P<0.05),具有更好的经济效益。说明中草药对琼中山鸡的生长性能、药物残留和经济效益均有良好的影响,可以在琼中山鸡健康养殖中应用。