期刊文献+
共找到16篇文章
< 1 >
每页显示 20 50 100
Age and Gender Dependent Deposition of Crude Nutrients and Energy in Fast Growing Meat-Type Chickens 预览
1
作者 Christian Wecke Frank Liebert 《动物科学期刊(英文)》 2019年第1期35-50,共16页
Two consecutive growth studies were conducted to investigate the age-dependent nutrient and energy deposition in male and female meat-type chickens (Ross 308) based on feather and feather-free body fraction data deter... Two consecutive growth studies were conducted to investigate the age-dependent nutrient and energy deposition in male and female meat-type chickens (Ross 308) based on feather and feather-free body fraction data determined according to the comparative slaughter technique. Birds were reared under standardized housing conditions (15 floor pens per gender, 5 birds per pen). Both the starter (day 1 to 22) and grower diets (day 22 to 36) were based on corn, wheat, soybean meal, soybean protein concentrate and crystalline feed amino acids. Diets were formulated to ensure an equal feed protein quality close to the ideal amino acid ratio by adjusting a constant mixture of the feed proteins. Individual body weight (BW) and feed intake per pen were recorded weekly. At the start (day 1) as well as on a weekly basis until the end of the 5th week, 15 birds per gender (each 3 pens of 5 birds) were selected and euthanized following 24 h feed deprivation. Subsequently, the feathers were manually removed and quantified. Crude nutrient analysed in representative samples of both feather and feather-free body fractions. The nutrient and energy deposition in the bodies of both genders were significantly increased with increasing age (p . Male birds deposited significantly higher body protein (p and female birds significantly more fat and energy in the whole body (p during the entire growth period. In contrast, no differences were found in protein contents of the BW gain between genders dependent on age (p > 0.05). However, the protein partitioning in the gain of both analyzed body fractions provided oppositional results. Accordingly, male birds yielded relatively more protein in the feather-free body fraction (p and females relatively more feather protein (p as related to the whole body protein gain. 展开更多
关键词 Growing CHICKENS Growth Performance Feed DEPRIVATION Empty Body Mass Nutrient DEPOSITION ENERGY DEPOSITION FEATHER Protein DEPOSITION Age GENDER
在线阅读 免费下载
Age and Gender Dependent Nutrient Composition of Feather and Feather-Free Body Fractions in Meat-Type Chickens 预览
2
作者 Christian Wecke Daulat Rehman Khan +1 位作者 Angela Sünder Frank Liebert 《动物科学期刊(英文)》 2018年第1期74-86,共13页
The objective of this research was to update current results about the nutrient composition of broiler chickens during the growth period up to market age. Two growth experiments were conducted for assessing the nutrie... The objective of this research was to update current results about the nutrient composition of broiler chickens during the growth period up to market age. Two growth experiments were conducted for assessing the nutrient content of feathers and feather-free body of meat-type chickens (Ross 308). Both male and female birds were reared under uniform management conditions (floor pens;15 pens per gender;5 birds per pen). Experimental diets both for the starter (day 1 to 22) and the grower period (day 22 to 36) were based on corn, wheat, soybean meal, soybean protein concentrate and well balanced with feed amino acids. The feed protein quality was adapted to the ideal amino acid ratio and equated within both of the feeding periods by adjusting a constant mixture of the feed proteins. Each 15 birds per gender (3 pens of 5 birds) were selected and subsequently fasted for 24 h before quantitative de-feathering both at start of the experiment and further on weekly up to the end of the 5th week. Nutrient content was determined in representative samples of the feather and feather-free body fraction. In the feather dry matter (DM) very high crude protein (CP) concentrations (>96%) with low age-dependent and insignificant gender-specific differences were observed. In spite, a relatively high variation of CP content in the DM of feather-free body was found. Depending on age, the body CP significantly decreased with increasing age, but male birds yielded higher (p < 0.001) CP content. The crude lipid content of the feather-free and whole empty body significantly increased with age and was higher in female as compared to male birds (p < 0.001). Depending on age and gender, the crude ash content both in feathers and feather-free body of modern fast-growing chickens was rather low and with very low variation. 展开更多
关键词 Growing CHICKENS FEATHER COMPOSITION BODY COMPOSITION Age GENDER
在线阅读 免费下载
The Graded Inclusion of Algae (<i>Spirulina platensis</i>) or Insect (<i>Hermetia illucens</i>) Meal as a Soybean Meal Substitute in Meat Type Chicken Diets Impacts on Growth, Nutrient Deposition and Dietary Protein Quality Depending on the Extent of Amino Acid Supplementation 预览
3
作者 Carmen Neumann Susanne Velten Frank Liebert 《动物科学期刊(英文)》 2018年第2期163-183,共21页
Three consecutive growth experiments were conducted to evaluate growth performance, whole body analyses and protein quality parameters from chicken diets with 50%, 75% and 100% substitution of soybean meal (SBM) by Sp... Three consecutive growth experiments were conducted to evaluate growth performance, whole body analyses and protein quality parameters from chicken diets with 50%, 75% and 100% substitution of soybean meal (SBM) by Spirulina meal (SM) or partly defatted Hermetia meal (HM). Each of the experiments was divided into a starter period (1 - 21 d) and a grower period (22 - 34 d). One-day-old male growing chickens (Ross 308) were randomly allotted to 48 floor pens making use of 6 birds/pen (Exp.1) or 7 birds/pen (Exp. 2, 3), and the experiments included a control diet (n = 12) and four experimental diets (n = 9). Experiment 1 examined a 50 % replacement of SBM by the alternative proteins under study, both on a basic and an advanced level of amino acid (AA) fortification to meet the recommended ideal amino acid ratio (IAAR). In experiment 2, 75% (starter diet) and 50% (grower diet) replacement of SBM was investigated. Experiment 3 investigated the effects of complete SBM substitution by SM or HM in starter and grower diets. In the second and third experiment diets with both of the alternative proteins and the control diet were AA supplemented to meet the current IAAR. In a further step, the calculated first limiting AA (LAA) was reduced to 80% of its requirement recommendation to allow for further evaluation of the individual AA efficiency according to the “Goettingen approach”. Different levels (50%, 75%, or 100%) of replacing SBM by HM or SM in chicken diets depressed dietary protein quality (p 0.001) and zoo-technical parameters (p 0.001) with only a basic level of AA supplementation. This effect was much more pronounced in diets with SM. However, with an extended level of dietary AA supplementation zoo-technical parameters (p 0.001), crude protein deposition (p 0.001) and protein quality parameters (p 0.001) were significantly improved. HM diets with an advanced level of AA tended to provide higher dietary protein quality and growth performance as compared to all SBM replacement levels through SM with different le 展开更多
关键词 Growing CHICKENS Amino Acids N Utilization Model GROWTH Performance Body Analyses Alternative Proteins Feed Protein Quality
在线阅读 免费下载
Age and Gender Dependent Amino Acid Concentrations in the Feather, Feather-Free and Whole Empty Body Protein of Fast Growing Meat-Type Chickens 预览
4
作者 Christian Wecke Daulat Rehman Khan +1 位作者 Angela Sünder Frank Liebert 《动物科学期刊(英文)》 2018年第3期223-238,共16页
Two consecutive growth experiments with meat-type chickens (Ross 308) were conducted in order to quantify the age-dependent amino acid (AA) content in the whole body protein of male and female birds based on experimen... Two consecutive growth experiments with meat-type chickens (Ross 308) were conducted in order to quantify the age-dependent amino acid (AA) content in the whole body protein of male and female birds based on experimental data of the feather and feather-free body protein fractions. Birds were reared under uniform housing and feeding conditions (floor pens, 15 pens per gender, 5 birds per pen) during the starter (day 1 to 22) and grower period (day 22 to 36). Both the starter and grower diet based on corn, wheat, soybean meal, soybean protein concentrate and feed amino acids was formulated to ensure an equal feed protein quality close to the ideal amino acid ratio by adjusting a constant mixture of the feed proteins. At start of the experiment and further on weekly up to the end of the 5th week, 15 birds per gender (each 3 pens of 5 birds) were selected and fasted for 24 h, to emptying of gastro-intestinal tract, respectively. Subsequently, birds were euthanized and the feathers were manually removed. Nitrogen (N) and AA content were determined both in the feather and feather-free body fraction. The concentration of individual AAs in both of body protein fraction is varying considerably. Explicitly higher Cys, Ser and Pro but importantly lower Met, Lys and His concentrations were found in the feather protein. Furthermore, significant differences (p for nearly all AAs of the studied body protein fractions and the whole empty body protein dependent on age of birds were observed. Especially high deviations were obtained during the first week of age and at the end of the experiment. According to this observed variation of AA concentrations must be concluded that the body AA composition of meat-type chickens during growth is not constant. The detected gender-specific differences for several AAs in the feather and body protein of male and female birds were rather low and with very low variation. 展开更多
关键词 Growing CHICKENS FEATHER AMINO ACIDS Body AMINO ACIDS Age GENDER
在线阅读 免费下载
Effects of the Partial Replacement of Soybean Meal by Insect or Algae Meal in Chicken Diets with Graded Amino Acid Supply on Parameters of Gut Microbiology and Dietary Protein Quality 预览
5
作者 Susanne Velten Carmen Neumann +1 位作者 Jenny Sch?fer Frank Liebert 《动物科学期刊(英文)》 2018年第3期259-279,共21页
Insects or algae are considered future solutions to substitute imported feed proteins like soybean meal (SBM) in animal nutrition. The objective of this research, as part of the multidisciplinary project “Sustainabil... Insects or algae are considered future solutions to substitute imported feed proteins like soybean meal (SBM) in animal nutrition. The objective of this research, as part of the multidisciplinary project “Sustainability transitions”, focused on replacing 50% SBM by partly defatted larvae meal from black soldier flies (Hermetia illucens) or the blue-green algae Spirulina platensis in meat type chicken diets. The current study aimed to evaluate the effects on body composition, protein quality, apparent precaecal digestibility (apcD) and parameters of intestinal microbiota. In total, 288 one-day-old male growing chickens (Ross 308) from a commercial hatchery were randomly allotted to 48 pens (6 birds per pen) across five diets, which were fed at a free choice level. The control diet utilized SBM, wheat and corn as main ingredients, and experimental diets replaced 50% of SBM by the alternative proteins under study. Amino acid (AA) supplementation of the final diets was conducted both at a basic level (diets HM, SM;Lys and Met added equal to the control diet) and an extended level of AA fortification (diets HM+, SM+;extended supplementation of Lys, Met, Thr, Arg). After finishing the growth study, 4 individual birds per diet were slaughtered for whole body analyses to derive nutrient utilization and dietary protein quality parameters. Additionally, pooled chyme samples from 16 birds per diet (control, HM and SM) were analyzed to assess apcD and microbial parameters. Diets HM and SM with a basic level of AA fortification led to significant depressions in nutrient deposition and dietary protein quality. However, HM+ and SM+ diets with an extended level of AA supplementation led to significantly improved responses;however these were still generally not on par with the control diet. The HM+ diet provided superior CP deposition and dietary protein quality, as compared to the SM+ diet, but equal to the control diet. Results of gut microbiology yielded no significant effects due to feeding the alternative protein sources 展开更多
关键词 Growing CHICKENS N Utilization Model Body Analyses Feed Protein Quality Gut Microbiology Precaecal DIGESTIBILITY SPIRULINA PLATENSIS Hermetia illucens
在线阅读 免费下载
Improving the Dietary Protein Quality by Amino Acid Fortification with a High Inclusion Level of Micro Algae (<i>Spirulina platensis</i>) or Insect Meal (<i>Hermetia illucens</i>) in Meat Type Chicken Diets 预览
6
作者 Carmen Neumann Susanne Velten Frank Liebert 《动物科学期刊(英文)》 2018年第1期12-26,共15页
The objective of this study was to measure protein quality parameters (PPV, NPU and NPUstd) of chicken diets with complete substitution of soybean meal (SBM) by Spirulina meal (SM) or partly defatted Hermetia meal (HM... The objective of this study was to measure protein quality parameters (PPV, NPU and NPUstd) of chicken diets with complete substitution of soybean meal (SBM) by Spirulina meal (SM) or partly defatted Hermetia meal (HM). N balance experiments were based on the quantitative excreta collection method, divided into starter period (10 - 20 d) and grower period (25 - 35 d). The study utilized 70 all male meat type chicken (Ross 308). Data assessment applied the exponential N utilization model of the “Goettingen approach”. The control diet was based on wheat, corn and SBM. In four experimental diets SBM was completely substituted by SM or HM, but fortified with feed amino acids (AA) both on a basic level of supplementation (Lys and Met added equal to the control diet) and on an extended level (Lys, Met, Thr, Arg, Val, Ile, His added). At a basic level of AA supplementation, complete replacement of SBM by SM or HM in chicken diets depressed dietary protein quality significantly (p 0.05). However, the extended level of AA supplementation improved protein quality parameters of the diets with both of the alternative proteins significantly (p < 0.05), but still generally not on par with the control diet. The observed responses were accentuated when the well-known effect of N intake on protein utilization was eliminated through the standardization of N intake by application of the “Goettingen approach”. 展开更多
关键词 N Balance Growing Chickens N Utilization Model Amino Acids Protein Qual-ity SPIRULINA PLATENSIS Hermetia illucens
在线阅读 免费下载
Effects of 50 Percent Substitution of Soybean Meal by Alternative Proteins from <i>Hermetia illucens</i>or Spirulina platensis in Meat-Type Chicken Diets with Graded Amino Acid Supply 预览
7
作者 Susanne Velten Carmen Neumann +4 位作者 Martina Bleyer Eva Gruber-Dujardin Maria Hanuszewska Barbara Przybylska-Gornowicz Frank Liebert 《动物科学期刊(英文)》 2018年第2期119-136,共18页
Alternative protein sources, such as insects or algae meals are in special focus of animal nutrition in order to replace soybean meal (SBM). As part of the multidisciplinary project “sustainability transitions” this... Alternative protein sources, such as insects or algae meals are in special focus of animal nutrition in order to replace soybean meal (SBM). As part of the multidisciplinary project “sustainability transitions” this study evaluated effects of replacing SBM by partly defatted larvae meal from the black soldier fly, Hermetia illucens or meal from the micro algae Spirulina platensis in broiler diets. The aim of the current study was to investigate the chickens’ growth performance and the intestinal morphology as well as the health status. 288 one-day-old male growing chickens (Ross 308) from a commercial hatchery were randomly allotted to 48 pens (6 birds per pen) for the growth study with five diets and feed supply on free choice level. The control diet was based on wheat, corn and SBM. The experimental diets replaced 50% of SBM by the alternative proteins under study, both on a basic level of amino acid (AA) supplementation (Lys and Met added equal to the control diet) (diet HM and SM) and an extended level of AA fortification (Lys, Met, Thr, Arg, Val added) (diet HM+ and SM+). Response of chickens was evaluated by zoo-technical parameters, which were under weekly control (e.g. growth, feed intake, feed conversion ratio, mortality). After finishing the growth study birds from control and the experimental diets at the basic level of AA supplementation were slaughtered after 12 hour fastening and utilized for gut morphometric analysis and histological evaluation of the health status. Diets at a basic level of AA fortification led to significant depression of growth, feed intake, feed conversion ratio, and protein conversion ratio, respectively. In addition, the acceptance of the Spirulina diet was lower (p ≤ 0.001) as compared to the Hermetia based diet. However, the extended level of AA supplementation improved all parameters significantly. Diets without extended AA supply altered some morphological parameters of the intestinal wall, but the nutritional significance of this observation needs to be verified 展开更多
关键词 Growing Chickens Feed Growth Performance HISTOLOGY MORPHOMETRY SPIRULINA PLATENSIS Hermetia illucens
在线阅读 免费下载
Age and Gender Depending Growth of Feathers and Feather-Free Body in Modern Fast Growing Meat-Type Chickens 预览
8
作者 Christian Wecke Daulat Rehman Khan +1 位作者 Angela Sünder Frank Liebert 《动物科学期刊(英文)》 2017年第4期376-392,共17页
Two growth experiments with fast growing meat type chickens (Ross 308) were conducted to assess the growth of feathers and feather-free body dependent on age and gender (male:female ratio = 1:1). Birds were reared und... Two growth experiments with fast growing meat type chickens (Ross 308) were conducted to assess the growth of feathers and feather-free body dependent on age and gender (male:female ratio = 1:1). Birds were reared under uniform management and feeding conditions (floor pens;15 pens per gender;5 birds per pen) during the starter (day 1 to 22) and grower period (day 22 to 36). Diets were based on corn, wheat, soybean meal, soybean protein concentrate and balanced with feed amino acids to ensure an equal feed protein quality close to the ideal amino acid ratio by a constant mixture of the feed proteins. At start of the experiment and further on weekly up to the end of the 5th week, 15 birds per gender (each 3 pens of 5 birds) were selected and 24 h fasted before quantitative de-feathering. Both feather and feather free body fractions were significantly increased with increasing age of the birds (p < 0.001). Feather percentage as related to the empty body weight increased non-linearly from approximately 2% at the end of the first week to about 4% at the end of the experiment. Feather percentage and dry matter content of the feather-free body was significantly higher in female birds (p < 0.001) as compared to males. Further investigations will show how this varying proportions impact on nutrient deposition of modern meat-type chickens dependent on age and gender, respectively. 展开更多
关键词 Growing CHICKENS FEATHER Percentage Feather-Free BODY Age GENDER
在线阅读 免费下载
不同棉酚含量的日粮饲喂伊莎褐生长鸡、产蛋鸡的试验研究 预览 被引量:3
9
作者 胡少鹏 富强 《畜禽业》 2001年第10期 44-46,共3页
本试验I组用10%脱毒棉仁饼代替部分大豆饼,日粮中含游离棉酚0.00498%。试验Ⅱ组用5%棉仁饼代替部分大豆饼,日粮含游离棉酚0.006%。对照组用低鱼粉大豆日粮,不含棉酚。试验分二个阶段进行。试验1,3种日粮饲喂莎褐生长鸡结果不... 本试验I组用10%脱毒棉仁饼代替部分大豆饼,日粮中含游离棉酚0.00498%。试验Ⅱ组用5%棉仁饼代替部分大豆饼,日粮含游离棉酚0.006%。对照组用低鱼粉大豆日粮,不含棉酚。试验分二个阶段进行。试验1,3种日粮饲喂莎褐生长鸡结果不影响增重,饲料利用率试验组低于对照组,增重成本试验I组最低,试验Ⅱ组稍高于对照组。试验2,3种日粮饲喂伊莎褐商品代蛋鸡结果不影响产蛋率,蛋重和饲料利用率对照组高于试验组。鸡蛋成本试验I组比对照组低0.07元。试验证明10×脱毒棉仁饼代替部分大豆饼含游离棉酚0.00498%的日粮经济效益最高。目前缺乏蛋白质饲料,而大豆饼价格上涨的情况下,试验I、Ⅱ组日粮均可采用。 展开更多
关键词 生长鸡 产蛋鸡 生产性能 日粮 棉酚含量 伊莎褐鸡 开发利用
在线阅读 免费下载
Assessing Lysine Requirement of Growing Chicken by Direct Comparison between Supplementation Technique and “Goettingen Approach” 预览
10
作者   Samadi +2 位作者 Christian Wecke Anja Pastor Frank Liebert 《动物科学期刊(英文)》 2017年第1期56-69,共14页
Validated procedures play an important role to obtain accurate information about individual amino acid requirement data. The aim of the present study was to assess lysine (Lys) requirement of growing chicken both by c... Validated procedures play an important role to obtain accurate information about individual amino acid requirement data. The aim of the present study was to assess lysine (Lys) requirement of growing chicken both by classical supplementation technique and principles of diet dilution technique as applied with “Goettingen approach”. During the starter period (1 - 21 d), a growth study with male meat type chicken (Ross 308) was conducted making use of five graded dietary Lys-levels (3 repetition boxes with 3 birds/box). L-Lys×HCl was gradually added to a diet based on wheat, soybean protein concentrate, wheat gluten and fishmeal to yield 80%, 87.5%, 95%, 102.5% and 110% of the expected requirement level (13 g Lys/kg as fed). Diets were iso-energetic (12.8 MJME/kg) and iso-nitrogenous (21.65% crude protein). Birds were fed on free choice level also to assess the feed intake (FI) effects as important factor on traditional response criteria. Analyzed body composition at start and end of the growth study yielded N deposition (ND) data for further data assessment using exponential approximations depending on dietary Lys content or observed Lys intake. The results indicated significant differences (p < 0.05) in response on body weight gain (BWG) and observed dietary protein quality with unexpected consequences for the derived Lys requirement data. According to the independent variable (Lys in % of diet versus daily Lys intake) and aimed level of daily ND, the needed in-feed content of Lys varied between 1.24% and 1.46%. Application of the exponential modelling by “Goettingen approach” overcame these misleading conclusions by modelling the relationship between required Lys intake and observed response data (BWG, ND) taking also into account the expected real feed intake to formulate the needed in-feed concentration. 展开更多
关键词 GROWING CHICKEN LYSINE Requirement Supplementation TECHNIQUE Diet DILUTION TECHNIQUE N Utilization Model Amino Acid Efficiency
在线阅读 免费下载
An Elevated Dietary Cysteine to Methionine Ratio Does Not Impact on Dietary Methionine Efficiency and the Derived Optimal Methionine to Lysine Ratio in Diets for Meat Type Chicken 预览
11
作者 Daulat Rehman Khan Christian Wecke Frank Liebert 《动物科学期刊(英文)》 2015年第4期457-466,共10页
Optimal dietary methionine (Met) to lysine (Lys) ratio in presence of elevated dietary cysteine (Cys) levels was derived for meat type growing chicken. Twelve averaged weighed Ross 308 birds (each 50% of male and fema... Optimal dietary methionine (Met) to lysine (Lys) ratio in presence of elevated dietary cysteine (Cys) levels was derived for meat type growing chicken. Twelve averaged weighed Ross 308 birds (each 50% of male and female per dietary treatment) were utilized in N balance trials. During starter (d10 - 20) and grower period (d25 - 35) five dietary treatments were used. Diets based on uniform mixtures of maize, wheat, soybean meal, potato protein and fish meal were supplemented with crystalline amino acids (AA). In diets 1 - 3, the dietary Cys to Met ratio was set as 85, 95 and 105 to 100, respectively. Diet 4, at a Cys to Met ratio of 105 to 100, was additionally supplemented with betaine (BET) as methyl group donor. Diets 1 - 4 were limiting in Met, diet 5 without L-Lys·HCl addition was limiting in Lys. Individual N-balance data per treatment were utilized for assessing protein quality and efficiency of dietary Met (Diets 1 - 4) or Lys (Diet 5) based on “Goettingen approach”. Elevated dietary Cys supply and supplemented BET failed to improve both dietary protein quality and Met efficiency. The established optimal Met to Lys ratio was on average 34 to 100 for growing chicken during starter and grower period, respectively. 展开更多
关键词 Growing CHICKEN N Utilization Model Amino Acid Efficiency METHIONINE to LYSINE RATIO CYSTEINE Betaine
在线阅读 免费下载
蚕沙在育成鸡配合饲料中饲喂效果观察(初试) 预览 被引量:2
12
作者 马黎 冯炳文 +1 位作者 胡廷海 周恒春 《西南民族学院学报:畜牧兽医版》 1990年第3期 78-81,共4页
将育成鸡(四月龄)公80只母16只均分为4组,按其营养需要设一基础日粮。分别用4%,8%,12%的蚕沙替代基础日粮中的麦麸,经一个月的饲喂试验,与对照组比较,以4%蚕沙组增重效果差异显著(P<0.05)。试验结果表明,用适量蚕沙替代麦麸饲喂... 将育成鸡(四月龄)公80只母16只均分为4组,按其营养需要设一基础日粮。分别用4%,8%,12%的蚕沙替代基础日粮中的麦麸,经一个月的饲喂试验,与对照组比较,以4%蚕沙组增重效果差异显著(P<0.05)。试验结果表明,用适量蚕沙替代麦麸饲喂育成鸡,适口性好,无任何不良表现,对育成鸡生长还有明显增重效果。 展开更多
关键词 饲料 蚕沙 育成鸡 增重
在线阅读 下载PDF
国产“双低”菜籽饼作为育成鸡蛋白质饲料的研究 预览 被引量:4
13
作者 高玉鹏 薛雅蓉 《动物营养学报》 CAS CSCD 1996年第2期 64,共1页
<正> 试验选陕西省经济作物所提供的低芥酸(含量0.15%)、低硫甙(含量2.46mg/g)的“双低”菜籽饼作为育成鸡的蛋白质饲料,分别研究了其对育成鸡生长发育、甲状腺、肝及其功能的影响。 选用6周龄罗曼父母代母鸡600只,随机分为5组:... <正> 试验选陕西省经济作物所提供的低芥酸(含量0.15%)、低硫甙(含量2.46mg/g)的“双低”菜籽饼作为育成鸡的蛋白质饲料,分别研究了其对育成鸡生长发育、甲状腺、肝及其功能的影响。 选用6周龄罗曼父母代母鸡600只,随机分为5组:其中2个对照组,3个试验组(每组2重复)。每组120只鸡分10笼饲养,常规饲养管理;预试期1周,正试期13周。“双低”菜籽饼在 展开更多
关键词 菜籽饼 蛋白质饲料 营养
在线阅读 下载PDF
肯德基速生鸡事件危机公关广告与公众态度变化——基于新浪微博的内容分析 预览 被引量:6
14
作者 靳明 张英 《财经论丛》 CSSCI 北大核心 2014年第8期70-77,共8页
肯德基速生鸡事件引起公众对肯德基产品和食品安全状况的关注和质疑。面对危机事件,肯德基采取“否认一修正补救一广告辩解”的危机响应策略。本文基于新浪微博的内容分析,研究公众的认知和态度是否随着肯德基危机公关广告策略而改变... 肯德基速生鸡事件引起公众对肯德基产品和食品安全状况的关注和质疑。面对危机事件,肯德基采取“否认一修正补救一广告辩解”的危机响应策略。本文基于新浪微博的内容分析,研究公众的认知和态度是否随着肯德基危机公关广告策略而改变。研究认为:肯德基危机公关广告能够提高公众对产品的了解程度和积极态度,降低公众的风险感知以及促使公众将危机事件责任归因于企业外部因素,但广告并未从根本上改变公众对肯德基食品安全事件的态度。 展开更多
关键词 肯德基 速生鸡事件 产品伤害危机 危机公关广告 公众态度
在线阅读 免费下载
规模化肉鸡场疾病防治用药及其检测方法综述 预览 被引量:2
15
作者 罗青平 张腾飞 +2 位作者 罗玲 张蓉蓉 邵华斌 《肉类研究》 2013年第2期29-31,共3页
针对当前“速成鸡”事件对规模化养殖鸡行业形成较大的负面影响,对肉鸡出栏时间、疫病防治用药及其残留物检测方法进行综述,客观总结兽药使用对鸡肉品质和安全的影响,旨在为肉鸡生产、检测部门及公众提供参考。
关键词 速成鸡 规模化养殖鸡 兽药 残留 鸡肉 安全
在线阅读 下载PDF
浅谈利巴韦林 预览 被引量:7
16
作者 刘敬先 杜柏林 王丽娜 《黑龙江医药科学》 2013年第5期24-25,27共3页
综述了利巴韦林药物简介、抗病毒作用机制、国内外临床应用、违规应用、毒性及潜在危害、药物滥用原因、代谢规律与检测难度等内容,比较了利巴韦林的国内外临床应用差别,提出了利巴韦林谨慎用药方案和解决畜禽养殖过程中滥用利巴韦林问... 综述了利巴韦林药物简介、抗病毒作用机制、国内外临床应用、违规应用、毒性及潜在危害、药物滥用原因、代谢规律与检测难度等内容,比较了利巴韦林的国内外临床应用差别,提出了利巴韦林谨慎用药方案和解决畜禽养殖过程中滥用利巴韦林问题的建议. 展开更多
关键词 利巴韦林 三氮唑核苷 速生鸡 抗病毒药物 耐药性
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部 意见反馈