Studies on the growth and carcass composition in Daldale wether lambs. 2. The effect of dietary protein/energy ratio

Two experiments on the effect of dietary protein/energy ration on growth and carcass composition in Daldale wether lambs were carried out.In experiment 1, two groups of eight lambs in each group were fed in pens at a restricted intake (30 g air-dry feed per kg liveweight) either on a high protein/high energy diet (HP/HER) (20.7% crude protein) or on a low protein/high energy diet (LP/HER) (10.3% crude protein). The lambs were grown from 24.8 kg liveweight until slaughter at 37.5 kg. In experiment 2, two groups of eight lambs in each group were fed in pens a pelleted diet ad libitum, either on a high protein/high energy ration (HP/HEA) or on a low protein/high energy ratio (LP/HEA). The lambs were grown from 22.0 � 0.8 kg liveweight until slaughter at 37.5 kg. Those lambs on the HP/HE diets grew significantly faster than their counterparts on the LP/HE diets. Accordingly, animals given the HP/HE diets showed a superior feed conversion ratio than animals given the LP/HE diets. Despite these differences, there was no overall differences between treatments either at restricted or at ad libitum intake in the weight of carcass, the dressing percentage, and in the chemical composition of the carcass. In general, the carcasses produced contained a similar amount of fat (30.6%-32.9% of carcass). It was concluded that varying protein to energy ratio in diets affected liveweight gain and feed conversion ratio, but did not affect carcass composition.An experiment was conducted on the diets to investigate some aspects of digestion in the stomach and intestines at the two levels of crude protein.Dietary crude protein level had little effect upon the apparent digestibility of organic matter (OM) and neutral detergent fibre in the whole tract, the proportion of NDF digested in the stomach, the total volatile fatty acid concentration (VFA) in the rumen and the proportions of individual VFA.The flow of rates of digesta from the rumen and abomasum were also similar for the two diets. However, the proportion of the total digestion of OM occurring in the stomach decreased, while the flow of total N and crude protein (CP) (total N minus ammonia N x 6.25) to the intestines and the amounts of N and CP digested therein was higher on the HP diet.The data from the digestion experiment showed that the amount of digestible CP in the intestines per unit of digestible OM intake did not affect carcass composition.

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DIETS AND DIETARY INGREDIENTS SELECTION BY BROILER CHICKEN: EFFECTS ON GROWTH PERFORMANCE, CARCASS QUALITY AND ECONOMICS OF PRODUCTION

Nigerian Journal of Animal Production ◽

10.51791/njap.v26i1.2825 ◽

2021 ◽

Vol 26 ◽

pp. 35-42

Author(s):

G. E. Onibi ◽

A. P. Owoyemi ◽

O. O. Akinyemi

Keyword(s):

Weight Gain ◽

Broiler Chicken ◽

High Energy ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Low Energy ◽

Feed Conversion ◽

Low Protein ◽

Choice Feeding ◽

Low Energy Diet

A total of 90day – old Hypeco broiler chicks were used in a choice-feeding trial to investigate whether meat-type chicken could select adequate nutrients that would support fast growth rate from a choice of imbalanced diet and feed ingredients. Three diets were used: a control diet (diet A= 200g/kg CP, 3031 kcal/kg ME) and two test diets; a low protein, high-energy diet (diet B=166g/kgCP, 3021 kcal/kg ME) and a low-protein, low-energy diet (diet C=168g/kgCP, 2838 kcal/kg ME). The diets were fed singly. The test diets were also used in a choice-feeding with ground maize and soya-bean meal (SBM). The study lasted for 5weeks and the response criteria included growth performance, carcass and organ characteristics, and economics of production. Weight gain and feed conversion ratio were significantly (P < 0.01) and (P < 0.001 respectively) influenced. Birds on the control diets had the highest weight gain and best feed conversion ratio. Birds on the low-protein, high-energy diet had performances not significantly (P > 0.05) lower than the control. The low-protein, low-energy diet depressed performance. Feeding the imbalanced diets (diets B and C) singly produced better performances than feeding them with a choice of dietary ingredients. Birds exhibited selection potentials by selecting the ground maize and SBM to compensate for deficiencies in the imbalanced diets but not at a level adequate enough to improve performances. Only the relative chest weight was significantly (P < 0.05) influenced amongst the carcass and organ weights measured. It decreased with decreasing feed quality. Economics of production showed that low quality and cheaper priced feeds do not necessarily give higher income and profit. The benefits of feeding single balanced diets and the possibility of decreasing the protein content of broiler finisher diets without compromising profits were revealed. It was suggested that broiler chicken appeared to select nutrients for maximize economic performance and that feed quality control should be enforced.

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The Potency of Bifidobacterium spp. as an Alternative to Antibiotic Growth Promoters on Feed Conversion Ratio, Feed Efficiency, and Nutrient Intake in Laying Hens

Journal of Southwest Jiaotong University ◽

10.35741/issn.0258-2724.56.2.23 ◽

2021 ◽

Vol 56 (2) ◽

pp. 281-290

Author(s):

Andreas Berny Yulianto ◽

Anam Al Arif ◽

Widya Paramita Lokapirnasari

Keyword(s):

Feed Efficiency ◽

Protein Intake ◽

Crude Protein ◽

Laying Hens ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Crude Fiber ◽

Fiber Intake ◽

Feed Conversion ◽

Growth Promoters

This article describes a new idea about using Bifidobacteriumsp isolates as an alternative to antibiotic growth promoters, based on the ability of Bifidobacteriumsp isolates, which have the potential as a probiotic in laying hens. This study aims to prove that Bifobacteriumsp could improve production performance, including feed conversion ratio, feed efficiency, and nutrient intake (feed intake, crude protein intake, crude fiber intake, lipid intake, and organic matter). A total of 150 laying hens at 25 weeks of age were divided into three groups (P0: control, P1: 0.1% antibiotic growth promoters, P1: 0.05% Bifidobacterium spp. probiotic) and fed on a basal diet containing 2750 kcal/kg metabolizable energy and 18% crude protein for four weeks. The different supplementation to the basal diets showed significant differences (p<0.05) on feed conversion ratio, feed efficiency, feed intake, crude protein intake, crude fiber intake, lipid intake, and organic matter intake among the treatments. However, feed intake, feed conversion ratio, crude protein intake, crude fiber intake, lipid intake, and organic matter intake were lowest in the group fed with 0.5% of Bifidobacterium spp. The highest feed efficiency was obtained from the groups fed with 0.5% of Bifidobacterium spp, compared with the control and supplemented antibiotics growth promoters group. 0.5% of Bifidobacterium spp. supplementation to the diet of laying hens is beneficial for increasing feed efficiency and improving feed conversion ratio. The practical and theoretical significance of the results is that Bifidobacterium spp. can be used to improve production performance in laying hens.

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Effect of dietary protein on the growth of mullet, Chelon labrosus, reared in sea cages

Archives of Polish Fisheries ◽

10.1515/aopf-2017-0015 ◽

2017 ◽

Vol 25 (3) ◽

pp. 157-164 ◽

Cited By ~ 2

Author(s):

Muhammet Altunok ◽

Osman Özden

Keyword(s):

Dietary Protein ◽

Crude Protein ◽

Specific Growth ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Stocking Rate ◽

Grey Mullet ◽

Feed Conversion ◽

Protein Levels ◽

Chelon Labrosus

Abstract The purpose of the study was to obtain preliminary data on the effect of dietary protein on the growth of the thick-lipped grey mullet (Chelon labrosus) juveniles reared in net sea-cages. The juveniles (6.2 ± 0.61 g) were obtained from the wild and were stocked into net sea-cages at a stocking rate of 100 juveniles per cubic meter and fed with experimental diets including 25, 30, or 35% crude protein for 87 days. The highest mean weight and specific growth rate (SGR) were 39.5 g and 2.13% day−1, respectively, at protein levels of 30%. The diet also resulted in the most efficient feed conversion ratio of 1.61.

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Pengaruh Suplementasi Ampas Tahu, Ampas Tempe dan Ampas Kecap dalam Ransum Terhadap Performan Domba Lokal Jantan

Sains Peternakan ◽

10.20961/sainspet.5.1.1-9 ◽

2017 ◽

Vol 5 (1) ◽

pp. 1

Author(s):

Eka Handayanta

Keyword(s):

Body Weight ◽

Organic Matter ◽

Crude Protein ◽

Average Daily Gain ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Soy Sauce ◽

Feed Consumption ◽

Feed Conversion ◽

Daily Gain

The aim of this research to determine the effect of supplementation of tofu. tempe, and soy sauce waste in ration on male local sheep performance. This research was carried out during three month, take place on July until October 200E in Minifarm Dept. of Animal Science, Agriculture Faculty of Sebelas Maret University, located in Jatikuwung. Gondangrejo, Karanganyar. It used 12 male local sheeps with average body weight of 15.86 ±0.93 kg, divided into four treatments and three replications, each replication consist of one sheep. The ration consisted of king grass only as basal diet, as many as four percent base on body weight. The treatment given is in the form of feed supplement, that namely without supplement (RO), 250 gram tofu waste (R1), 250 gram tempe waste (R2), and 250 gram soy sauce waste (R3). The data variables collected were feed consumption, dry and organic matter digestibility, crude protein consumption, energy consumption, average daily gain, and feed conversion ratio. All of data except average daily gain was analyzed by completely randomized design one way classification. While average daily gain was analyzed by covariance analyze. The result were significant followed by Duncan new multiple range test. The result showed that average of R0, RI, R2 and R3 for feed consumption 430.52; 720.44; 704.44; 549.08 gram/day, dry matter digestibility (%) 61,07; 72,46; 69,68: 63,60, organic matter digestibility (%) 64,41: 74,94; 72.41; 64,7 1, crude protein consumption 47.66; 106.77; 85.83; 73.70 gram/day, energy consumption 281.82; 482.65; 432.67; 330.83 gram/day, average daily gain 50.00.1X00: 116.19; 38.10 gram/day and feed conversion ratio 8.74; 5.61; 6.06; 15.2. The result of variance analyze showed that feed supplementation have highly significant effect (P<0.01) on all of the data variable colected. Conclusion of this research was supplementation of tofu waste and tempe waste could improved performance, while soy sauce waste could not improved the performance of male local sheep. Key words : sheep, tofu waste, tempe waste, soy sauce waste, performance

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Effects of dietary selenium-yeast concentrations on growth performance and carcass composition of ducks

Animal Production Science ◽

10.1071/an16126 ◽

2017 ◽

Vol 57 (8) ◽

pp. 1731 ◽

Cited By ~ 5

Author(s):

Milan Ž. Baltić ◽

Marija Dokmanović Starčević ◽

Meho Bašić ◽

Amir Zenunović ◽

Jelena Ivanović ◽

...

Keyword(s):

Weight Gain ◽

Growth Performance ◽

Subcutaneous Fat ◽

Conversion Ratio ◽

Carcass Composition ◽

Feed Conversion Ratio ◽

Daily Weight Gain ◽

Control Group ◽

Feed Conversion ◽

Dressing Percentage

The aim of the present study was to assess effects of selenium (Se)-yeast diet supplementation on performance and carcass composition in ducks. The study was performed on 240 1-day old ducklings of the same origin (Cherry Valley hybrid), during a 49-day period, which were fed diets supplemented with the following four different levels of Se yeast (ALKOSEL® R397): groups with Se at 0 mg/kg of the diet as-fed, 0.2 mg/kg, 0.4 mg/kg and 0.6 mg/kg. Growth performance (bodyweight, daily weight gain, daily feed intake, feed-conversion ratio) and carcass characteristics (hot and cold carcass weight, chilling losses, dressing percentage, carcass cut yields, and percentage of tissues in breast and thighs with drumsticks) of the ducks were determined. Animals fed high-Se diets (0.4 mg/kg) had higher (P < 0.05) final bodyweight and daily weight gain (from 15 to 49 days) compared with those fed diets with inadequate (0 mg/kg) or with supranutritional (0.6 mg/kg) Se levels. Ducks fed only with basal diet showed a higher (P < 0.05) feed-conversion ratio (from 15 to 49 days) compared with those supplemented with Se at 0.4 mg/kg and 0.6 mg/kg. Dressing percentage was higher (P < 0.01) in the control group (69.50%) than in the group with Se added at 0.6 mg/kg (66.85%). The weights of basic cuts from the duck carcasses did not significantly differ among compared groups. Moreover, the percentage of skin with subcutaneous fat in breast and thighs with drumsticks increased in Se-supplemented groups compared with the control group, while the opposite was determined with the percentage of muscle. It was concluded that a diet containing 0.4 mg of added Se per kilogram produced the greatest growth-performance results in ducks.

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Fish silage in black bass (Micropterus Salmoides) feed as an alternative to fish meal

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132009000500025 ◽

2009 ◽

Vol 52 (5) ◽

pp. 1261-1266 ◽

Cited By ~ 7

Author(s):

Lia Ferraz de Arruda ◽

Ricardo Borghesi ◽

Leandro Portz ◽

José Eurico Possebon Cyrino ◽

Marília Oetterer

Keyword(s):

Crude Protein ◽

Fish Meal ◽

Micropterus Salmoides ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Partial Substitution ◽

Fish Feed ◽

Feed Conversion ◽

Initial Weight ◽

Black Bass

The objective of this study was to use the residues of fermented sardine to elaborate the acid fish silage and its use in feed for aquaculture. Biological assay was performed by feeding largemouth bass (Micropterus salmoides) fingerlings (initial weight 22g), with extruded diets (41% crude protein; 3,600 kcal/kg digestible energy) containing 0.0, 7.5, 10.0, 12.5, or 15.0% of fish silage in partial substitution to the fish meal. The feed conversion ratio and weight gain for the treatments were: 1.26 and 15.76g; 1.11 and 17.07g; 1.19 and 17.81g; 1.18 and 19.83g; 1.47 and 14.64g, respectively. No significant differences (P<0.05) were detected among the treatments. Results indicated that it was possible to use up to 15% of acid fish silage as partial substitute for fish meal in the formulation of carnivorous fish feed.

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Effects of Low-Protein Diets and Exogenous Protease on Growth Performance, Carcass Traits, Intestinal Morphology, Cecal Volatile Fatty Acids and Serum Parameters in Broilers

Animals ◽

10.3390/ani9050226 ◽

2019 ◽

Vol 9 (5) ◽

pp. 226 ◽

Cited By ~ 6

Author(s):

Gervais Ndazigaruye ◽

Da-Hye Kim ◽

Chang-Won Kang ◽

Kyung-Rae Kang ◽

Yong-Jin Joo ◽

...

Keyword(s):

Fatty Acids ◽

Body Weight ◽

Growth Performance ◽

Relative Weight ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Intestinal Morphology ◽

Poultry Production ◽

Feed Conversion ◽

Low Protein

Dietary exogenous proteases (ENZ) can be used in poultry production to improve the growth of chickens fed low-protein (LP) diets. We hypothesized that ENZ supplemented in an LP diet would improve growth performance and physiological response in broilers for 8–35 days. To investigate this, we used a 2 × 2 factorial design with crude protein (CP, normal diet (NP) and LP) and ENZ. The LP diet contained low in 1% CP and ca. 8–12% amino acids compared to the NP diet and both NP and LP diets were added without or with (1 g/kg of diet) ENZ. We randomly allocated 720 1-week-old Ross 308 male chicks to 48 pens and experimental diets. At 21 days, dietary ENZ, but not CP, increased (p = 0.007) live body weight. Body weight gain from 8–21 days was affected (p = 0.006) by dietary ENZ, but was not affected (p = 0.210) by CP. The feed conversion ratio was affected by both CP and ENZ during the starter period (p < 0.05), by ENZ (p = 0.034) during the finisher period, and by CP (p < 0.001) during the whole period. However, the interaction between CP and ENZ did not significantly affect growth performance (p > 0.05). Dietary ENZ increased (p = 0.013) the relative weight of liver at 21 days. CP and ENZ affected (p = 0.043) total short-chain fatty acids at 21 days. However, this effect was not seen (p = 0.888) at 35 days. Dietary CP increased (p < 0.05) the serum concentrations of both uric acid and creatinine in broilers. We concluded that dietary ENZ is more beneficial to younger broilers, independent of CP levels, and that its effect was restricted to body weight and the feed conversion ratio.

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Genetic parameters for growth and feed efficiency in weaner versus yearling Charolais bulls

Australian Journal of Agricultural Research ◽

10.1071/ar00070 ◽

2001 ◽

Vol 52 (4) ◽

pp. 471 ◽

Cited By ~ 29

Author(s):

P. F. Arthur ◽

G. Renand ◽

D. Krauss

Keyword(s):

Feed Intake ◽

Feed Efficiency ◽

Genetic Correlations ◽

Residual Feed Intake ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Progeny Test ◽

Parameter Estimates ◽

Feed Conversion ◽

Total N

Data on young Charolais bulls were used to evaluate the effect of age of dam, and provide genetic parameter estimates for growth and feed efficiency traits in weaners compared with yearlings. Records on 510 performance test bulls born from 1985 to 1989 and 792 progeny test bulls born from 1988 to 1997 were used, plus available pedigree information (total n = 5493). After weaning (approximately 225 days of age), progeny test bulls were housed in barns and tested until 15 months for all bulls and 19 months of age for half of the bulls. From the records, the test period was artificially partitioned into a weaner and a yearling test. Both tests were for 140 days, with the weaner test commencing at approximately 274 days of age (6–8 weeks after weaning), and the yearling test commencing at approximately 430 days of age. For each test (weaner or yearling), average daily gain, daily feed intake, feed conversion ratio (feed intake per unit weight gain), and residual feed intake (feed intake net of the expected requirements for growth and maintenance) were calculated. Liveweights at 12 and 18 months of age were also studied. Age of dam effect was significant (P < 0.05) for weight at 12 and 18 months of age, and for all weaner traits except residual feed intake. All the traits studied were moderately heritable (0.20–0.46) except for feed conversion ratio in yearlings (0.10). Genetic correlations for the same traits measured in weaners and later in yearlings were less than unity (0.42–0.95), with the 3 highest correlations obtained for weight (0.950.03), feed intake (0.900.07), and residual feed intake (0.750.12). Therefore, for genetic improvement purposes, traits measured in weaners should be considered different from those measured in yearlings, except for weight and feed intake. However, the medium to very high genetic correlations between weaner and yearling tests for most of the traits studied indicate that selection based on weaners will have a positive correlated response in yearlings and vice versa.

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Effects of replacement of corn with potato (Solanum tuberosum L.) tuber meal in broiler chicken diets

Animal Production Science ◽

10.1071/an15547 ◽

2017 ◽

Vol 57 (2) ◽

pp. 320 ◽

Cited By ~ 1

Author(s):

Samira Adami ◽

Ghorbanali Sadeghi ◽

Ahmad Karimi ◽

Osman Azizi ◽

Mahmood Habibian

Keyword(s):

Uric Acid ◽

Broiler Chickens ◽

Solanum Tuberosum L ◽

Relative Length ◽

Conversion Ratio ◽

Carcass Composition ◽

Feed Conversion Ratio ◽

Control Group ◽

Feed Conversion ◽

Ileal Digestibility

This study was conducted to evaluate the nutritional value of potato tuber meal (PTM) for broiler chickens during growing (22–42 days) and finishing (43–49 days) periods. A total of 360 1-day-old male broiler chicks (Ross 308) were fed a corn-soybean meal-based diet until 21 days of age, then randomly assigned to six experimental diets, in which corn was replaced by PTM at 0%, 10%, 20%, 30%, 40%, and 50% levels by weight, respectively. Replacement of corn with 10%, 20%, 30% and 40% PTM had no effect on feed intake, bodyweight gain, and feed conversion ratio (P > 0.05). However, replacing 50% of corn with PTM resulted in a significant reduction (P < 0.05) in bodyweight gains from 22 to 42, and 22 to 49 days of age. Moreover, there was a significant (P < 0.05) increase in feed conversion ratio when 50% of corn was replaced by PTM. Corn replacement with PTM did not affect (P > 0.05) carcass and organ weights of broilers at 42 days of age. However, compared with the Control group, the relative length of the ileum was increased (P < 0.05) by inclusion of PTM in the diets, and it was statistically different for broiler fed diets in which 20% or 50% of corn was replaced by PTM. The serum concentrations of triglycerides, cholesterol, urea, and uric acid were not affected (P > 0.05) by diet inclusion of PTM. Replacing 50% of dietary corn with PTM significantly (P < 0.05) decreased apparent ileal digestibility of protein at 42 days of age. The excreta content of uric acid was not affected by diet inclusion of PTM. In conclusion, our results showed that PTM can replace dietary corn up to 40% during the growing and finishing periods with no adverse effects on growth performance of broiler chickens. Also, replacing up to 40% of corn with PTM in broiler diet had no adverse effect on carcass composition, blood constituents, and apparent ileal digestibility of protein at 42 days of age.

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Nutrient digestibility and growth performance of broiler chickens fed processed tropical sicklepod (Senna obtusifolia (L.)) seed meal based-diets

Journal of Agricultural Sciences Belgrade ◽

10.2298/jas1704371c ◽

2017 ◽

Vol 62 (4) ◽

pp. 371-384

Author(s):

Augustine Clement ◽

Kwari Dankasa ◽

Igwebuike Uchei ◽

Adamu Bala ◽

Diarra Siaka

Keyword(s):

Broiler Chickens ◽

Crude Protein ◽

Nutrient Digestibility ◽

Conversion Ratio ◽

Feed Conversion Ratio ◽

Seed Meal ◽

Productive Performance ◽

Ether Extract ◽

Feed Conversion ◽

Senna Obtusifolia

The eight-week feeding trial was conducted to evaluate the nutrient digestibility and growth performance of broiler chickens fed raw or processed Senna obtusifolia seed meal (SOSM). Six experimental diets were compounded to contain 0% SOSM and 20% each of the raw, boiled, soaked, sprouted and fermented SOSM respectively. Two hundred and sixteen (216) broiler chicks were randomly allotted to six (6) dietary treatments in a randomised complete block design with three (3) replicates containing 12 chicks each. Data were collected on nutrient digestibility, feed intake, weight gain, feed conversion ratio and mortality. The result of productive performance indicated that feed intake, weight gain and feed conversion ratio were significantly (P<0.05) depressed in broiler chickens fed raw, soaked and sprouted Senna obtusifolia seed meal. However, broiler chickens fed fermented SOSM showed better (P<0.05) productive performance that was close to those fed the positive control diet (0% SOSM). The mortality rate did not reveal any particular trend. However, the low mortality rate recorded in the different treatments indicated broiler chicken can tolerate up to 20% of either raw or processed SOSM. Broiler chickens fed raw SOSM recorded lower values for dry matter (63.06%), crude protein (52.46%), ether extract (53.88%), crude fibre (30.72%) and nitrogen-free extract (46.11%) digestibility than those fed the other processed SOSM. The nutrient digestibility of broiler chickens fed fermented SOSM was significantly (P<0.05) better followed by those fed boiled Senna obtusifolia seed meal. For instance, broiler chickens fed fermented Senna obtusifolia seed meal recorded the highest crude protein and ether extract of 69.91 and 70.03% compared to the other processing methods. It can be concluded that 20% fermented SOSM can be incorporated in the diets of broiler chickens with acceptable depreciation in biological performance. Slightly lower levels of boiled SOSM can be included in the diet of broiler chickens but the levels should be ascertained in further studies.

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