蛋形指数对蛋壳强度、孵化失重、羊水及尿囊液量影响的研究

通过孵化试验，研究了蛋形指数对蛋壳强度、孵化失重、羊水及尿囊液量的影响。结果表明，蛋形指数与蛋壳强度呈正相关，相关系数为0.30；蛋形指数在0.800~0.819时，蛋壳强度最大，大于和小于这个范围均呈下降趋势；蛋形指数在0.780~0.799时，蛋的失重最大，羊水和尿囊液的总量最少，大于和小于这个范围蛋的失重逐渐减小，而羊水和尿囊液的总量则逐渐增多。     

防护林散养乌鸡不同产蛋期绿壳蛋品质的比较

选取苏北黑羽乌鸡3个不同生产期的绿壳蛋作为研究对象,从蛋重、蛋黄颜色、蛋白高度以及哈氏单位4个方面对蛋品质进行研究.结果表明,绿壳蛋蛋黄颜色早期颜色指数主要集中在7～9,早期和中期差异显著,而后期与早、中期差异不显著;蛋白高度在早、中、后期差异不显著;蛋重在早期和中、后期差异显著,在中、后期相对稳定;在鸡蛋品质分级上,早期AA、A级蛋品质均较中、后期比例高.防护林下散养的黑羽乌鸡中、后生产期生产的绿壳蛋,其品质的一致性较高.     

闽南火鸡不同蛋形指数的种蛋孵化率

1观察方法选自闽南火鸡场同日龄的闽南火鸡,每群公母比例1∶9,单间饲养,自然交配,种蛋收集期10天(保存温度10℃,湿度70%～75%)。根据蛋形指数分为4组,即蛋形指数1.60以上(A)、1.50～1.59(B)、1.40～1.49(C)和1.39以下(D)。每组种蛋100个。先用游标卡尺对所收集的火鸡蛋逐个测定蛋形指数,然后按分组的标准各随机选择100个蛋做好标记,放入自动电热孵化机中孵化,孵化期间控制的温度和相对湿度为:1～6天,温度38.5～38℃,相对湿度60%;7～16天,38℃,55%;17～25天,37.5℃,55%;26～28天,37℃,60%～65%。设置两个重复,重复试验时,使用同台孵化机,按…     

不同蛋形指数与鹌鹑性别关系的研究

将种蛋按蛋形指数分为三组:A组(圆形组:蛋形指数大于93%)、B组(长形组:蛋形指数小于89%)、C组(正常形组,指数介于89%~93%之间)。分组孵化,结果显示各组种蛋孵出的鹌鹑公母比例都接近1∶1,差异不显著,证明了雏鹌鹑的性别与蛋形指数无关。     

蛋重、蛋形和蛋壳厚度对庄河大骨鸡孵化率的影响

为研究蛋重、蛋形指数、蛋壳厚度对庄河大骨鸡种蛋孵化率的影响,选取36周龄健康种鸡产种蛋1 257枚,按蛋重分为5组,相同条件孵化,分析蛋重、蛋形指数、蛋壳厚度对种蛋失重率、孵化率和初生重的影响.试验期28d.结果显示,36周庄河大骨鸡所产种蛋平均蛋重为64.13 g,各种蛋组间7、12、19胚龄蛋重均差异显著(P＜0....     

无公害草鸡散养生产技术

近年来,随着经济的发展和人民生活水平的提高,广大消费者对肉食品的消费开始从数量的满足逐步转向对肉质、风味的追求,一些优质地方肉鸡品种深受消费者欢迎。为适应市场需求,我市一些地方的农民利用撂荒地、山林地、苗木种植地、果园等开展草鸡的散养生产,获得成功。     

无公害草鸡散养生产技术

近年来,随着经济的发展和人民生活水平的提高,广大消费者对肉食品的消费开始从数量的满足逐步转向对肉质、风味的追求,一些优质地方肉鸡品种深受消费者欢迎.     

散养草鸡黑头病防治

鸡黑头病（又称盲肠肝炎、组织滴虫病）是鸡的一种急性原虫病,它因患鸡鸡冠呈暗紫色或黑色而得名。     

散养草鸡黑头病

鸡黑头病（又叫盲肠肝炎、组织滴虫病）是鸡的一种急性原虫病．由组织滴虫寄生于鸡肝脏和盲肠而引起的鸡血液循环障碍,它因鸡冠呈暗紫色或黑色而得名。组织滴虫随同异刺线虫卵排出体外,异刺线虫卵被蚯蚓吞食后,鸡吃到这样的蚯蚓即会感染发病。     

散养草鸡黑头病

鸡黑头病(又叫盲肠肝炎、组织滴虫病)是鸡的一种急性原虫病,由组织滴虫寄生于鸡肝脏和盲肠而引起的鸡血液循环障碍,它因鸡冠呈暗紫色或黑色而得名.组织滴虫随同异刺线虫卵排出体外,异刺线虫卵被蚯蚓吞食后,鸡吃到这样的蚯蚓即会感染发病.     

正阳三黄鸡产蛋初期蛋重、蛋形指数变化规律研究

 对正阳三黄鸡开产后70 d内的蛋重、蛋纵径、蛋横径进行了测量,研究正阳三黄鸡的蛋重、蛋纵径、蛋横径在开产初期的变化规律,并对产蛋初期蛋重、蛋纵径、蛋横径、蛋形指数进行相关分析,以及连产周期对蛋形指数的影响进行分析。结果表明：蛋重、蛋纵径、蛋横径在产蛋初期随着日龄的增加而增加,蛋形指数却随着日龄的增加而减小,且四者之间均存在着极显著的相关,而连产周期对蛋形指数的影响不显著.     

蛋形指数对孵化率及性比例的影响

用单因子试验设计，探讨了罗曼父母代种蛋蛋形指数与孵化率，性比例的关系，结果表明，蛋形指数为72％－77％时孵化率最高，蛋形指数与性比例无直接关系，符合遗传规律1：1的性比例关系。     

籽鹅种蛋蛋重与蛋形指数对孵化效果影响的研究

本试验旨在研究不同水平蛋重与蛋形指数对籽鹅种蛋孵化效果的影响,进而总结出种蛋筛选的最佳方案,为籽鹅个体、家系种蛋的选留及籽鹅的繁衍、孵化、生产提供科学参考。选取二年籽鹅种蛋2 469枚,蛋重为94.8~154.4 g,平均蛋重（123.3±9.5）g;蛋形指数为1.24~1.63,平均蛋形指数1.45±0.05。采用2因素4水平试验设计,将所有种蛋按蛋重与蛋形指数分成16个孵化组（蛋重与蛋形指数分别分为4个水平）,测量每枚种蛋蛋重与蛋形指数,并在蛋壳上做好编号,在相同孵化条件、同一孵化设备中进行两次孵化试验。结果表明,①蛋重<118.0 g组种蛋受精率最高,>131.9 g组次之;>131.9 g组种蛋受精蛋孵化率最高,125.0~131.9 g组次之,且受精蛋孵化率随着蛋重增大升高;125.0~131.9 g组种蛋孵化健雏率最高,>131.9 g组次之;>131.9 g组种蛋孵出鹅雏出生重最大。②蛋形指数在1.47~1.51组种蛋受精率及种蛋孵化健雏率最高,>1.51组次之;1.47~1.51组种蛋受精蛋孵化率最高,1.42~1.46组次之。分析以上结果可得出：籽鹅种蛋蛋重对种蛋受精率、受精蛋孵化率、健雏率、鹅雏出生重有显著影响（P<0.05）,以籽鹅蛋重在125.0~154.4 g为宜;蛋形指数对种蛋受精率、受精蛋孵化率、健雏率亦有显著影响（P<0.05）,对种蛋孵出鹅雏出生重无影响（P>0.05）,以蛋形指数在1.47~1.51为宜。籽鹅种蛋蛋重与蛋形指数对受精率、受精蛋孵化率、健雏率、鹅雏出生重的影响均存在交互作用。其中,蛋形指数对种蛋孵化健雏率的影响较蛋重强,其作为单一因素对鹅雏出生重无影响。以上结果表明,以蛋重或蛋形指数任一因素作为种蛋筛选的依据都不科学,应综合考虑以达到种蛋优选的目的。     

Impact of Hatching Egg Weight and Egg Shape Index on Hatching Results in Zi Goose

This paper was aimed to study the impact of hatching egg weights and egg shape indexs on hatching of Zi goose,and then sum up the best scheme for hatching eggs screening,so as to provide scientific reference for the selection and retention of Zi goose individuals and family hatching eggs,as well as the breeding and incubation production.2469 hatching eggs of Zi geese of the second year were chosen with the weight range of 94.8 to 154.4 g and an average weight of (123.3±9.5) g;the egg shape index range was 1.24~1.63 and the average index was 1.45±0.05.Using 2 factors 4 levels test design,the weight and the shape index of eggs were divided into four levels and all the eggs were separated into 16 hatching groups.The weight and the shape index were measured and labeled on eggshells.Two hatching experiments were conducted in the same instrument and the hatching conditions were same.The results showed that:① Egg fertility rate was the highest in egg weight <118.0 g group,followed by >131.9 g group;Hatchability of fertilized eggs was the highest in >131.9 g group,followed by 125.0~131.9 g group,and the hatchability of fertilized eggs increased along with the increase of egg weight;The highest healthy chick rate of breeding egg hatching lay in 125.0~131.9 g group,followed by >131.9 g group;The highest breeding egg hatching gosling birth weight lay in >131.9 group.② When egg shape index was between 1.47 to 1.51,the egg fertility rate and healthy chick rate were the highest,followed by >1.51 group;In the group 1.47 to 1.51,hatchability of fertilized eggs was the highest,followed by 1.42 to 1.46 group.In conclusion,hatching egg weight of Zi goose had significant impact on egg fertility rate,hatchability of fertilized eggs,healthy chick rate and gosling birth weight (P<0.05),and the egg weight of Zi goose between 125.0~154.4 g was advisable;on the other hand,egg shape index also had significant impact on egg fertility rate,hatchability of fertilized eggs and healthy chick rate (P<0.05),but had no impact on gosling birth weight (P>0.05),and the egg shape index between 1.47 to 1.51 was appropriate.Egg fertility rate,hatchability of fertilized eggs,healthy chick rate and gosling birth weight were affected by interaction of egg weight and shape index.Compared with the weight of eggs,the egg shape index had greater influence on healthy geese rate.The egg shape index had no direct impact on birth weight of young geese,but it could be influenced by the interaction between the egg shape index and the weight.Thus it was not very scientific to take either the weight or the index as the only basis for choosing qualified hatching eggs.     

单色光对产蛋鸡蛋重和蛋形的影响

试验采用红(660nm)、绿(560nm)、蓝(480nm)三种发光二极管(处理组)和白炽灯(400～700nm)(对照组),对180只海兰褐蛋鸡进行人工光照,研究单色光对蛋重、蛋长径、短径和蛋形指数的影响。结果提示:蓝光使蛋长径变短而红光使蛋短径变短,蓝光和红光组蛋重随产蛋周龄而增长的趋势小于白光和绿光组。     

单色光对产蛋鸡蛋品质的影响

试验采用红(660nm)、绿(560nm)、蓝(480nm)3种发光二极管(处理组)和白炽灯(400～700nm)(对照组),对180羽海兰褐蛋鸡进行人工光照,研究了单色光对蛋重、蛋形指数、蛋长径、短径和蛋壳质量的影响。试验期为19～52周,光强度均为15lx,光照时间为16h。结果表明:在整个试验期,白光组蛋重最高(61.1g),红光组最低(59.2g),二者之间差异显著(P<0.05);38～52周龄,蓝光组蛋长径显著小于其他组,而其短径显著(P<0.05)小于白光组,另外,红光组蛋短径极显著(P<0.01)小于其他组;19～37周龄,绿光组蛋形指数(1.303)显著大于其他组,而38～52周龄,红光组蛋形指数(1.343)极显著(P<0.01)大于其他组;21～45周龄,绿光组蛋壳强度(3.54kg/cm2)极显著(P<0.01)高于白光和蓝光组而绿光组蛋壳厚度(0.368mm)显著(P<0.05)大于其他组;蓝光组蛋壳颜色值(31.6)显著(P<0.05)小于白光组(33.1)。结果提示:蓝光使蛋长、径变短而红光使蛋短径变短,从而使蓝光和红光组蛋重随产蛋周龄而增长的趋势小于白光和绿光组。单色光可影响蛋壳质量,其中绿光组的蛋壳质量最好。     

Effect of Monochromatic Light on the Egg Quality of Laying Hens

The chicken eye can discriminate light color, and different light wavelengths affect egg quality. In this study, we used blue (B), green (G), and red (R) light produced by light-emitting diode lamps, as well as incandescent light (W) to illuminate Hy-Line Brown hens from 19 to 52 wk. All light sources were equalized to a light intensity of 15 lx and applied for 16 h daily. The results showed that egg weight in W light (61.1 g) was significantly (P < 0.05) greater than those in R light (59.2 g) throughout the experimental stage. Beginning at the age of 30 wk, egg weight in R light was consistently smaller than those in other lights. The egg length in B light was significantly (P < 0.05) shorter than those in other lights, and its width was significantly (P < 0.05) shorter than those in W light from 38 to 52 wk. The egg width in R light was significantly (P < 0.01) shorter than those in W light and to a lesser extent (P < 0.05) shorter than those in B and G lights from 19 to 52 wk. Similarly, eggshell strength in G light was significantly (P < 0.01) better than those in W and B lights, and eggshell thickness in G light was significantly (P < 0.05) better than those in other lights from 21 to 45 wk. Our results indicate that egg weight in R light was less than those in other lights, the egg length and egg width in B light became shorter, and the egg width in R light became shorter with age; the egg quality in G light was found to be the best.     

乌骨鸡蛋形指数对孵化率的影响

将乌骨鸡种蛋按蛋形指数分为A(≤ 72 0 % )、B(72 1 %～ 74 0 % )、C(74 1 %～76 0 % )、D(76 1 %～ 78 0 % )、E(≥ 78 1 % ) 5组进行孵化 ,结果表明 :5组乌骨鸡的受精蛋孵化率分别为 82 6%、86 1 %、90 2 %、87 2 %、82 5% ,C组显著高于A、B、D、E各组 (P <0 0 5) ,并极显著地高于A组和E组 (P <0 0 1 ) ,蛋形指数为 74 1 %～ 76 0 %的乌骨鸡种蛋孵化效果最佳     

改善产蛋后期鸡蛋蛋壳质量研究进展

蛋壳质量是评价蛋品质的重要指标,和鸡蛋的运输和保存过程中的破损率相关,且直接与种蛋的合格率、孵化率和鸡苗的健康密切相关,是影响蛋鸡生产效益的要素之一.蛋鸡老龄化是导致产蛋后期蛋壳质量下降的主要因素.特别是近年来,商品蛋鸡的产蛋周期大大延长,蛋鸡老龄化程度更高,这导致产蛋后期面临的蛋壳质量下降的问题更为严峻.本文对蛋壳的...