共查询到19条相似文献，搜索用时 218 毫秒
1.
试验比较了矮小型鸡30周龄笼养、30周龄放养和60周龄笼养3种饲养方式下的蛋重、哈氏单位、蛋形指数、蛋壳厚度和蛋壳强度等蛋品质指标。试验结果表明:3组鸡蛋的蛋形指数无显著差异;笼养组随着产蛋周龄增加,蛋重显著增加,其他指标下降;放养组的蛋重、蛋壳厚度和蛋壳强度显著低于同周龄笼养组,哈氏单位则显著提高。 相似文献
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不同饲养方式对蛋鸡生产性能和蛋品质的影响 总被引：2，自引：0，他引：2
本试验旨在研究不同饲养方式对蛋鸡生产性能和蛋品质的影响。选取400只22周龄如皋黄鸡,随机分为两组,分别进行常规笼养和室外林地放养,每组200只,每组4个重复,每个重复50只。试验期为126d（3－7月）,饲养至40周龄时进行蛋品质测定。结果表明,126d饲养期内,放养组产蛋数和产蛋率均显著低于笼养组（98.61vs106.5,78.3%vs84.5%;P〈0.05）;280日龄放养组鸡蛋的蛋形指数为1.35,显著高于笼养组的蛋形指数1.30（P〈0.05）。蛋壳强度、蛋壳厚度方面,放养鸡蛋和笼养鸡蛋差异不显著（P〉0.05）;放养组鸡蛋的哈氏单位和蛋黄颜色显著高于笼养鸡蛋（P〈0.05）。 相似文献
3.
《养殖与饲料．饲料世界》2020,(9)
在北京农效禽业有限公司随机选取健康状况良好、体重相近的19周和29周"华北柴鸡"各32只,编号Ⅰ、Ⅱ组,按每笼4只常规养殖密度饲养;在北京昌平微生态健康散养蛋鸡示范基地随机选取健康状况良好、体重相近的29周"华北柴鸡"32只散养,编号Ⅲ组。在相同环境条件下饲养,1周后在试验各组随机选取24 h产出蛋10枚,短时间内完成蛋重、蛋壳重、蛋壳厚度、蛋黄指数、蛋形指数和哈氏单位指标的测定与计算。试验结果表明,Ⅰ、Ⅱ、Ⅲ组蛋形指数无显著差异;笼养条件下"华北柴鸡"随着产蛋日龄的增加,蛋重增加、其他指标呈下降趋势;30周散养鸡蛋的蛋重接近20周笼养鸡蛋,蛋壳显著增厚。 相似文献
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《水禽世界》2017,(7)
本试验选取22、32、42、52周龄笼养和散养的济宁百日鸡所产鸡蛋各100枚进行蛋品质和常规化学成分的测定,以了解饲养方式对鸡蛋品质及其常规化学成分的影响。结果表明:22周龄笼养组鸡蛋的蛋重、蛋壳强度、蛋壳厚度显著高于散养组(P0.05),而哈氏单位显著低于散养组(P0.05);32周龄笼养组鸡蛋的蛋重显著高于散养组(P0.05);42周龄散养组鸡蛋的蛋壳强度和蛋黄指数显著高于笼养组(P0.05);52周龄散养组鸡蛋的蛋黄指数显著高于笼养组(P0.05)。32、42、52周龄笼养组和散养组鸡蛋的水分、灰分、粗脂肪、粗蛋白均没有显著差别(P0.05)。本研究表明,饲养方式对济宁百日鸡蛋品质有一定影响,对鸡蛋的常规化学成分没有显著影响。 相似文献
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7.
不同周龄母鸡鸡蛋及不同蛋壳质地鸡蛋的蛋品质比较 总被引：1，自引：0，他引：1
本文比较了同一品种不同周龄(26、40周龄和64周龄)母鸡所产蛋的蛋壳品质和蛋品质,包括蛋重、蛋壳相对重、蛋形指数、蛋壳强度、蛋壳厚度、蛋黄颜色、蛋黄指数、蛋黄比率、哈氏单位、蛋清pH值。之后,还比较了该鸡种不同蛋壳质地鸡蛋(正常蛋和砂壳蛋)之间上述指标的差异。结果表明:在不同周龄母鸡所产蛋之间,蛋重、蛋黄指数、蛋黄比率、哈氏单位等均存在显著差异(p<0.05),而蛋壳厚度之间差异不显著(p>0.05)。此外,蛋重、蛋形指数、蛋黄颜色、蛋黄比率随着母鸡周龄的增加呈上升趋势,而蛋壳强度、蛋壳相对重、哈氏单位、蛋黄指数、蛋清pH值呈下降趋势。最后,蛋壳质地不同的鸡蛋(正常蛋与砂壳蛋)之间,蛋重、蛋壳相对重、蛋壳强度、蛋清pH值之间存在极显著差异(p<0.01),而其他参数之间差异不显著(p>0.05)。 相似文献
8.
《中国家禽》2019,(17)
为探究广西地方鸡品种南丹瑶鸡的蛋品质变化规律,以南丹瑶鸡为试验材料,在饲养条件相同的情况下,对其整个产蛋期的蛋品质进行了研究。检验指标包括蛋重、蛋形指数、蛋壳厚度、蛋壳强度、哈氏单位、蛋黄颜色、蛋黄重等。结果显示:蛋重随着产蛋周龄的增加而增大,产蛋后期极显著高于产蛋前、中期(P0.01),蛋形指数和蛋黄比率随着产蛋周龄的增加呈上升趋势,蛋壳强度和蛋壳厚度在整个产蛋周期内无明显的变化规律,蛋壳比率随着产蛋周龄的增加呈下降趋势,哈氏单位在产蛋前期和产蛋中期无明显变化,在产蛋末期急剧下降,蛋黄颜色在产蛋初期颜色最深,随着产蛋周龄的增加呈下降趋势,在产蛋末期急剧下降。总体而言,南丹瑶鸡鸡蛋蛋重较小、蛋壳较薄、蛋形规则、蛋白浓稠、蛋黄比率高、蛋黄颜色较深。由此可见,南丹瑶鸡作为广西地方鸡品种具有较好的蛋品质,且在不同产蛋期的蛋品质具有一定的变化规律。 相似文献
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散养和笼养条件下二郎山山地鸡蛋肉兼用系蛋、肉品质分析比较 总被引：1，自引：0，他引：1
为比较二郎山山地鸡散养和笼养方式下的蛋肉品质差异,本试验测定了笼养和散养二郎山山地鸡的蛋重、蛋壳强度、蛋黄重、壳色、蛋黄比例、蛋形指数、蛋白高度、蛋黄颜色、蛋壳重、蛋白重、蛋白比例、蛋壳比例等蛋品质和肌内脂肪含量、宰后45 min pH值等重要肉品质。结果显示:(1)蛋重、蛋壳强度在散养和笼养条件下无显著差异(P>0.05);壳色、蛋黄重和蛋黄比例在笼养条件下极显著高于散养条件(P<0.05);而散养条件下的蛋形指数、蛋白高度、蛋黄颜色、蛋壳重、蛋白重、蛋白比例和蛋壳比例极显著高于笼养条件(P<0.05);(2)散养条件下的二郎山山地鸡的45 min pH值和肌内脂肪含量均极显著高于笼养条件(P<0.05)。试验结果说明,在散养条件下饲养的二郎山山地鸡蛋肉兼用系蛋肉品质在总体上均优于笼养条件,二郎山山地鸡蛋肉兼用系适于散养生产。 相似文献
11.
1. The objective was to estimate heritability, genetic and phenotypic correlations for egg quality traits of Iranian native fowl at the Yazd Breeding Centre. 2. External and internal egg quality traits were measured on 1200 eggs from 794 hens of the 6th generation. A multivariate animal model with restricted maximum likelihood procedure was applied to estimate heritability, genetic and phenotypic correlations for egg quality traits using ASREML. 3. Heritability estimates for external egg quality traits ranged from 0·18 to 0·57 and for internal egg quality traits from 0·24 to 0·60. 4. For external egg quality traits, genetic correlation between egg weight and eggshell thickness (EST) was positive (0·36) and EST showed high genetic correlations with eggshell weight (0·84) and eggshell strength (0·55). This implies that heavier eggs tend to have thicker and stronger shells. 5. For internal egg quality traits, albumen height showed high positive genetic correlations with albumen weight (0·52), albumen index (0·98), yolk height (0·72) and yolk index (0·57). 6. Our results show that it is feasible to improve egg quality in Iranian fowl through selection for albumen height. 相似文献
12.
试验旨在比较笼养和平养方式对不同品种蛋鸭蛋品质的影响,以期为评价不同饲养方式下的鸭蛋品质提供参考依据。随机选取40周龄笼养和平养的金定鸭（青壳蛋）和山麻鸭（白壳蛋）鸭蛋各30枚于产后24 h内进行蛋品质测定。结果表明,同一品种笼养蛋鸭蛋重极显著大于平养蛋鸭蛋重（P<0.01）,蛋重与蛋壳重、蛋白重和蛋黄重之间均存在极显著正相关（P<0.01）,但不同类型鸭蛋的蛋黄重之间差异不显著（P>0.05）。青壳蛋的蛋壳强度显著高于白壳蛋（P<0.05）,笼养青壳蛋的蛋壳强度亦高于平养青壳蛋（P<0.05）。蛋的比重与蛋壳厚度呈极显著正相关（0.503,P<0.01）,与蛋壳强度的相关系数亦达到0.536（P<0.01）。4种类型鸭蛋的哈氏单位均达到72以上。虽然蛋白重与蛋黄重之间呈极显著正相关（P<0.01）,但蛋白重与蛋黄比率之间却呈极显著的负相关（P<0.01）。蛋的比重与蛋黄重和蛋黄比率之间亦存在显著负相关（P<0.05）。以上结果表明,就蛋品质而言,蛋鸭养殖以采用笼养模式、选择青壳蛋鸭品种为宜。 相似文献
13.
The purpose of this test was to evaluate the egg quality from two breeds of ducks reared in cages and on floor.30 eggs were chosen from each type of eggs,which were from Jinding (green shell) and Shan Partridge ducks (white shell)at 40 weeks-old reared in cages and on floor for egg quality evaluation.The results showed that the egg weight of caged duck was extremely significantly larger than the floor duck (P<0.01) in the same breed,there were very significant positive correlations between the egg weight and eggshell weight,egg-white weight and egg yolk weight (P<0.01),but no significant difference among the egg yolk weights of different types of ducks (P>0.05).The shell strength of green egg was obviously higher than that of white shell eggs (P<0.05),and the shell strength of green egg from caged ducks was higher than that of the green egg ducks on floor.The correlation coefficients of the egg specific gravity and eggshell thickness,the specific gravity and eggshell strength were 0.503 (P<0.01) and 0.536 (P<0.01) respectively.Haugh units of four types of ducks all reached 72 or more.Although there was significant positive correlation between egg-white weight and egg yolk weight (P<0.01),significant negative correlation was existed between egg-white weight and egg yolk ratio (P<0.01).There were significant negative correlations between egg specific gravity and egg yolk weight (P<0.05) and egg yolk ratio (P<0.05).In conclusion,the mode of cage feeding and the breed with green shell were appropriate choices in laying-egg duck production for high egg quality. 相似文献
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《The Journal of Applied Poultry Research》2014,23(1):59-70
The shell of the egg is essential in providing shape to the egg and ensuring safe packaging of the internal contents; however, shell defects have been shown to increase the risk of microbial contamination of eggs. Eggs were collected from commercial cage and free-range flocks at the ages of 25, 35, 45, 55, 65, and 75 wk. From each collection per flock, 30 eggs were processed for the eggshell and egg internal quality determination, 30 eggs for cuticle estimation, 30 eggs for mammillary layer ultrastructural features scoring, and 60 eggs for egg microbial enumeration. Translucency score and shell reflectivity were significantly higher in free-range eggs and increased with flock age in both production systems. Egg weight, shell weight, percentage shell, shell thickness, albumen height, Haugh unit, and yolk color were higher for cage eggs. The amount of cuticle was higher in cage eggs and fluctuated with flock age in both production systems. For the mammillary layer ultrastructural variables, a significant effect of production system and flock age was observed for early fusion, Type A bodies, and Type B bodies, whereas aragonite, depression, erosion, and hole were rarely observed. Variability of mammillary cap size, the incidence of poor mammillary cap quality, incidence of late fusion, alignment, Type A bodies, Type B bodies, and cubic cone formation were greater in the free-range versus cage system and increased with flock age in both production systems. The incidence of confluence and early fusion were greater in cage eggs and decreased with age in both production systems. Significantly lower total microbial load was observed for cage compared with free-range eggs, but the overall bacterial load recorded in this study was low. It can be concluded that cage eggs were better in overall quality when directly compared with free-range eggs. 相似文献
15.
珍珠鸡是从国外引进,经人工驯养育成的一个特色品种,其蛋用性能获得了显著进展,为加快蛋产品的开发力度,增加其附加价值,对珍珠鸡蛋和海兰褐鸡蛋蛋品质及营养成分进行比较分析。试验随机抽取新鲜珍珠鸡蛋、海兰褐鸡蛋各100枚,测定其蛋外、内在品质及主要营养成分,采用Duncan新复极差法、皮尔逊相关系数进行比较分析。研究表明,在外部品质方面,海兰褐鸡蛋蛋重高于珍珠鸡蛋15.54g（35.61%）,有极显著差异（P〈0.01）;珍珠鸡蛋蛋壳厚度比海兰褐鸡蛋的蛋壳厚0.14mm（40%）,差异极显著（P〈0.01）;由于蛋重的差异,两种鸡蛋蛋黄比例、蛋白比例、蛋壳比例也均有极显著差异（P〈0.01）。在内在品质方面,两种鸡蛋蛋清pH、蛋黄高度、蛋黄系数均无明显差异;珍珠鸡蛋浓蛋白高度比海兰褐鸡蛋的低3.02mm,有极显著差异（P〈0.01）;浓蛋白系数比海兰褐的高0.87,有显著差异（P〈0.05）;珍珠鸡蛋蛋黄颜色比海兰褐鸡蛋的颜色大一个罗氏比色值,有显著差异（P〈0.05）。在营养成分上,以g/枚为单位,珍珠鸡蛋的主要营养成分除胆固醇高于海兰褐鸡蛋外,其他均低于海兰褐鸡蛋。以g/100g为单位,珍珠鸡蛋水分含量明显低于海兰褐鸡蛋,相差12.62（20.21%）,差异极显著（P〈0.01）,脂肪含量也低于海兰褐鸡蛋,差异显著（P〈0.05）,相差1.34（4.4%）,其它营养成分均高于海兰褐鸡蛋。珍珠鸡蛋是较海兰褐鸡蛋小、壳厚、水分含量低、营养丰富的浓缩型蛋,为珍珠鸡蛋的蛋品开发创造了条件。 相似文献
16.
不同阶段体重与产蛋性状遗传相关分析 总被引：2，自引：0，他引：2
对白来航蛋鸡各阶段体得发育与主要产蛋性状的遗传相关分析表明，６周体重与３００天平均蛋重的跗个关为０．８４１（Ｐ〈０．０１）、与７２周入舍鸡产蛋数的遗传相关为０．６２７（Ｐ〈０．０１）。６周龄前后是培育壮体格、发达内脏的后备母鸡的重要时期。 相似文献
17.
Broiler breeder pullets were exposed to constant 10-, 11-, 12-, 13-, 14- or 16-h photoperiods from 3 d of age. Egg weight, eggshell weight and shell thickness index were determined at 52 weeks of age. Egg weight increased by 0.31 g, shell weight decreased by 30 mg and shell thickness index decreased by 0.57 mg/cm2 for each one-hour increase in photoperiod. Whilst the changes in egg weight and eggshell thickness index might be overstated because eggs were collected at the same chronological time, the effect of time of egg-laying within the day was minimal in comparison, and did not negate the conclusion that egg weight increases, and shell weight and thickness index decrease with lengthening photoperiods. The effect of photoperiod on eggshell quality was not due to differences in the rate of lay between treatments. Shell weight was unaffected by time of lay. 相似文献
18.
《中国畜牧杂志》2019,(9)
为探究散养对皖南三黄鸡生长性能和肉品质的影响,试验选择80羽4周龄、体重相近、健康无病的的皖南三黄鸡,随机分为笼养组和散养组,笼养组每只鸡单笼,每组40个重复。试验期9周。结果表明:6周龄时散养组体重高于笼养组(P<0.05),试验期散养组胫围高于笼养组(P<0.05);笼养组的肌肉滴水损失率、蒸煮损失率和失水率以及腿肌水分、粗脂肪含量和pH高于散养组(P<0.05);与散养鸡相比,笼养鸡生长速度较快,但散养鸡肌肉系水力高于笼养鸡(P<0.05),表明散养鸡肉品质优于笼养鸡。综上,生产者应该根据自身情况以及不同市场对鸡肉产品的不同要求选用适宜的饲养方式。 相似文献
19.
为选育改良国产高产蛋鸡产蛋中后期蛋品质,确定合理的饲养周期。本研究选取北京市华都峪口禽业有限责任公司13世代Y1、K1品系蛋鸡,测定56、66、72、80周龄蛋重、蛋壳颜色、蛋壳强度、蛋白高度和蛋黄颜色,采用DMU软件估计遗传参数。结果表明:随着蛋鸡周龄增大,Y1、K1系蛋重显著提高(P0.05),蛋壳强度、蛋白高度和蛋黄颜色极显著下降(P0.01);Y1系和K1系56~80周龄各性状遗传力在0.03~0.52;品系内同一性状不同周龄之间高度遗传相关(0.57~0.99),同一周龄不同性状之间遗传相关(-0.39~0.43)和表型相关(-0.049~0.122)均较低。本研究表明高产蛋鸡纯系产蛋后期蛋品质随周龄增加有所下降,同一性状不同周龄之间高度相关,可以通过前期的选育提高后期蛋品质。 相似文献