scholarly journals Growth performance of Red Chittagong and Holstein crossbred bull calves using growth promoter

1970 ◽  
Vol 8 (1) ◽  
pp. 83-86 ◽  
Author(s):  
MK Sarker ◽  
MR Amin ◽  
M Harun-ur-Rashid ◽  
AKMA Kabir
Keyword(s):  
Growth Performance ◽  
Conversion Efficiency ◽  
Live Weight ◽  
Growth Promoter ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Treatment Groups ◽  
Daily Average ◽  
Net Returns ◽  
Bull Calves

The aim of the study was to evaluate and compare the effect of growth promoter 'Megavit-DB' on growth performance of indigenous Red Chittagong (RC) and Holstein Crossbred (HC) bull calves. For this purpose, six RC and six HC bull calves were assigned into four treatment groups having three calves in each as RCT0 (RC without Megavit-DB), RCT1 (RC with Megavit-DB), HCT0 (HC without Megavit-DB) and HCT1 (HC with Megavit-DB). The daily DM intake of different treatment groups were found almost similar. The daily average live weight gains were 0.27±0.05, 0.36±0.01, 0.36±0.01 and 0.45±0.05 kg/d, feed conversion efficiency were 9.08±0.16, 7.47±1.07, 7.13±1.24 and 6.16±0.27 and the average net returns (Tk.) were 1473.33±87, 2060±76.38, 1910±86.60 and 2776.67±44.10 for RCT0, RCT1, HCT0 and HCT1 treatment groups, respectively. The daily average live weight gain and feed conversion efficiency were significantly (p<0.05) higher in HCT1 than that from RCT1, HCT0 and RCT0. Accordingly, the average net returns were found significantly (p<0.05) higher in HCT1 than RCT1, HCT0 and RCT0. It may be concluded that Megavit-DB may have the potentials to improve growth performance of both HC and RC and may be used in cattle fattening program. Keywords: Growth performance; Red Chittagong; Holstein Crossbred; Megavit-DB DOI: 10.3329/jbau.v8i1.6403J. Bangladesh Agril. Univ. 8(1): 83-86, 2010

scholarly journals Dietary Green Seaweed Compromises Overall Feed Conversion Efficiency but not Blood Parameters and Meat Quality and Stability in Broiler Chickens

Agriculture ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 547
Author(s):  
Tumisang Ben Matshogo ◽  
Caven Mguvane Mnisi ◽  
Victor Mlambo
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Conversion Efficiency ◽  
Broiler Chickens ◽  
Live Weight ◽  
Blood Parameters ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Performance Improvements ◽  
Green Seaweed

Using seaweeds as sources of nutrients and beneficial bioactive compounds can promote sustainable production of functional poultry products. This study investigated the physiological and meat quality responses of Cobb 500 broiler chickens to graded levels of green seaweed (Ulva sp.) meal (SWM). Three hundred, two-week-old male chicks (159.3 ± 11.76 g live-weight) were randomly assigned to five diets formulated by diluting a standard broiler diet with SWM at 0 (SW0), 20 (SW20), 25 (SW25), 30 (SW30) and 35 g/kg (SW35). There were neither linear nor quadratic trends (p > 0.05) for overall feed intake, overall growth performance and carcass and meat quality traits. Overall feed conversion efficiency (R2 = 0.192, p = 0.018) and spleen weights (R2 = 0.182; p = 0.020) linearly declined as SWM levels increased. Linear and quadratic responses (p > 0.05) were observed for lymphocytes. There were linear effects for meat pH except on day 7 of storage. Meat lightness (L*) linearly increased whereas meat redness (a*) quadratically responded to SWM levels (day 3 of storage). While an optimum inclusion level could not be established for seaweed based on growth performance, improvements in some meat shelf life indicators were observed in the broilers reared on seaweed-containing diets.

scholarly journals Effect of Diatomaceous Earth on Growth Rate, Egg Production, Feed Conversion Efficiency and Parasitic Load in Hens Raised on Deep Litter

2021 ◽  
Vol 3 (1) ◽  
pp. 97-103
Author(s):  
Robert Alex Isabirye ◽  
Savino Biryomumaisho ◽  
James Okwee-Acai ◽  
Samuel Okello ◽  
George William Nasinyama
Keyword(s):  
Growth Rate ◽  
Conversion Efficiency ◽  
Egg Production ◽  
Diatomaceous Earth ◽  
Agricultural Research ◽  
Ascaridia Galli ◽  
Feed Conversion ◽  
Indigenous Chicken ◽  
Feed Conversion Efficiency ◽  
Treatment Groups

The efficacy of diatomaceous earth (DE) on growth rate, egg production and on increasing feed conversion efficiency in deep litter raised layer hens was evaluated. The study was conducted at Mukono Zonal Agricultural Research and Development Institute (MUZARDI) in Uganda. Worms were collected from fresh intestines of indigenous chicken obtained from Kalerwe chicken market near Kampala. The DE was mined in Pakwach (formerly Nebbi) district in Northern Uganda. Chickens of the Lohmann Brown breed raised on deep litter were studied. At 7 weeks the birds were divided into 5 treatment groups, A, B, C, D and E each composed of 40 birds. Groups C, D and E were given an oral dose containing 250 embryonated eggs of A. galli while groups A and B were not infected. The chicks were weighed; and subjected to feeding trials as arranged below: A – Non-infected birds on DE (4%) supplemented diet; B –non-infected birds on neither piperazine (a conventional de-wormer) nor DE; C – infected birds on DE supplemented diet; D – infected birds on piperazine; and group E – infected birds on neither DE nor piperazine applied. Fecal samples were collected and analysed in the laboratory biweekly at week 16 till week 22 respectively for fecal egg counts. In a subsequent experiment, day-old layer chicks from Lohmann Brown strain but different from those used in earlier experiments, were used to assess the effect of DE on egg production. At 17 weeks of age the 420 were divided as follows: 6 treatment groups each having 7 replicates and each replicate having 10 birds. This study showed that DE can be used successfully in growing pullet diets to correct nutritional mineral imbalance since it supplies more than 14 trace elements and other elements. Diatomaceous earth also enables pullets to cope with Ascaridia galli load; and 2% DE supplementation did not have significant improvement on egg production as compared to no supplementation at all. However, reduction in egg production was experienced when supplementation with levels of DE higher that 2% was applied. Results from biweekly fecal analyses showed significant differences in fecal egg counts (p<0.05); and treatment by group (p<0.05).

Effect of hypothyroidism on growth performance, carcass composition and meat quality of fat-tailed Lori-Bakhtiari lambs

2015 ◽  
Vol 55 (10) ◽  
pp. 1324 ◽  
Author(s):  
Yousef Baghcheghi ◽  
Ahmad Zare Shahneh ◽  
Mahdi Ganjkhanlou ◽  
Mahdi Khodaei Motlagh ◽  
Ali Reza Yousefi
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Conversion Efficiency ◽  
Shear Force ◽  
Carcass Composition ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Mild Hypothyroidism ◽  
Plasma Triiodothyronine

The aim of the present study was to investigate the effects of induction hypothyroidism by propylthiouracil (PTU) on the growth performance and meat quality of fat-tailed Lori-Bakhtiari lambs. Eighteen Lori-Bakhtiari male lambs were randomly assigned to one of three groups (n = 6) and received daily treatments (gavage) consisting of 0 (Control: C), 10 (Low: L) or 20 (High: H) mg PTU/kg bodyweight/day for 60 days. PTU decreased plasma triiodothyronine and thyroxine concentration in both L and H (P < 0.0001). Lambs treated with PTU (L and H) had lower feed intake (P < 0.004), feed conversion efficiency (P < 0.003), and greater intramuscular fat than C lambs (P < 0.035). Meat from the L and H lambs had lower cooking loss and shear force, and also higher L* (lightness) than C lambs (P < 0.004, P < 0.015 and P < 0.025, respectively). The meat of H and L lambs was more tender than C lambs (P < 0.032). However, the meat of H lambs required fewer chews before swallowing than C lambs (P < 0.041). Generally, induction of mild hypothyroidism appeared to improve feed conversion efficiency and meat quality of lambs.

Effects of castration on growth rate, feed conversion efficiency and carcass quality in Damascus goats

1977 ◽  
Vol 24 (3) ◽  
pp. 387-391 ◽  
Author(s):  
A. Louca ◽  
S. Economides ◽  
J. Hancock
Keyword(s):  
Growth Rate ◽  
Sexual Activity ◽  
Conversion Efficiency ◽  
Live Weight ◽  
Carcass Quality ◽  
Feed Conversion ◽  
Intact Male ◽  
Goat Meat ◽  
Feed Conversion Efficiency

SUMMARYOne hundred and forty-two kids of the Damascus breed of goat were used over a 10½-mo period to study the effects of early castration (at 7 days of age) on growth, feed conversion efficiency and carcass quality and late castration (at 7½ mo of age) on the presence or absence of taint in goat meat.Intact male kids grew faster and used feed more efficiently than castrates until they were about 9 mo old (56 kg live weight). There- after intact kids exhibited strong sexual activity and as a result their growth ceased completely whereas castrates continued growing. Early castrates produced fatter carcasses than those of intact kids. Castration of male kids at the age of about 7½ mo (44 kg live weight) was not successful in this trial and the kids performed very poorly. A taint of varying intensity was present in the meat of intact goats but not in that from any of the early or late castrates.

Exogenous growth hormone releasing factors and cottonseed meal improve growth performance and composition of gain in lambs fed lucerne chaff ad libitum

1994 ◽  
Vol 45 (6) ◽  
pp. 1111 ◽  
Author(s):  
RD Sainz ◽  
BJ Hosking ◽  
FJ Hart ◽  
BR Schricker
Keyword(s):  
Growth Hormone ◽  
Growth Performance ◽  
Cottonseed Meal ◽  
Conversion Efficiency ◽  
Meat Tenderness ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Reduced Fat ◽  
Ad Libitum ◽  
Dressing Percentage

Forty-eight crossbred wether lambs (38 kg) were randomly assigned to two dietary groups (LUC, chaffed lucerne ad libitum; CSM, LUC plus 300 g cottonseed meal/lday) and two hormone treatment groups (rGRF, recombinant growth hormone-releasing factor (GRF); sGRF, synthetic GRF) plus controls (CON, excipient only), and slaughtered after treatment for 28 (n = 36) or 30 (n = 12) days. An initial slaughter group (n = 12) was killed on day 0. CSM reduced intake of lucerne chaff, but increased total feed intake. CSM also increased liveweight gain and wool growth, with no effect on feed conversion efficiency. CSM increased carcass weight and decreased subcutaneous fat depth, with no effect on dressing percentage or longissimus dorsi (LD) area. Meat tenderness tended to decrease with CSM supplementation. CSM increased carcass protein accretion ( P < 0.01), with no significant change in fat gain or final composition (P > 0.05). CSM increased weights of the pelt, liver and empty body, and decreased the proportion of digesta in liveweight. Weights of blood, forestomachs and small intestine tended to increase as well (P < 0.10). Both sources of GRF had similar effects. Intakes were not significantly affected by GRF, but feed conversion efficiency improved (P < 0.01) with GRF treatment (6.4 v. 9.2 feed:gain for GRF and CON respectively). Liveweight gains and final weights of the whole body and carcass were increased additively by CSM and GRF. GRF reduced fat depth and increased LD area, with no effect on dressing percentage, carcass length or meat tenderness. These changes reflected increased carcass protein and reduced fat contents, brought about by increased accretion of protein and water and reduced fat gain due to GRF. GRF increased weights of blood and liver beyond the general increase in body size. Cottonseed meal and GRF additively produced significant improvements in growth performance and carcass quality of young wether lambs fed a roughage diet. GRF may be a useful tool to improve livestock production under extensive and intensive conditions.

Influence of Dietary Substitution of Palm Oil by Rapeseed Oil at Different Levels on Growth Performance and Economics of Broilers

2020 ◽  
Author(s):  
C. Sudharsan ◽  
S. Senthil Murugan ◽  
Biju Chacko ◽  
Sanis Juliet ◽  
Suresh N. Nair ◽  
...  
Keyword(s):  
Growth Performance ◽  
Palm Oil ◽  
Rapeseed Oil ◽  
Body Weight Gain ◽  
Live Weight ◽  
Omega 3 ◽  
Feed Conversion ◽  
Treatment Groups ◽  
Significant Difference ◽  
Poultry Diets

Background: Fat and oil are commonly used in poultry diets to increase energy density and also to increase the palatability of feed, feed efficiency and for deposition of fat in broilers. Thus a study was proposed to find the effects of dietary replacement of saturated fatty acid rich palm oil (PO) by omega-3 rich rapeseed oil (RO) on growth performance and economics in broilers. Method: The growth performance feeding trial was conducted in 160 day-old broilers (vencobb 400) with four treatment groups (G1, G2, G3 and G4) with four replicates of ten chicks each. The basal diet (R1) was prepared with palm oil included at the rate of 1.5, 3, and 4.5 per cent in pre-starter, starter and finisher ration, respectively and fed to G1. The other treatment groups G2, G3 and G4 received R2, R3 and R4 experimental rations respectively. The experimental rations R2, R3 and R4 were prepared with rapeseed oil replacing 25, 50 and 100 per cent of palm oil which was included in R1. Result: The broiler ration prepared with rapeseed oil at 50 and 100 per cent level (G3 and G4) replacing palm oil showed increased body weight gain (P less than 0.01) and better feed conversion ratio (P less than 0.05) than G1 group. There was no significant difference in the feed intake among the different treatment groups. Profit per kg live weight in G3 (Rs.12.06) and G4 (Rs.11.14) was more than G1 (Rs.8.21) and G2 (Rs.6.57). The supplementation of omega-3 rich rapeseed oil had significantly improved the performance of broilers.

Effects of selection for lower backfat, and increased levels of dietary amino acids to digestible energy on growth performance, carcass merit and meat quality in boars, gilts, and barrows

1997 ◽  
Vol 77 (3) ◽  
pp. 487-496 ◽  
Author(s):  
R. R. Grandhi ◽  
R. L. Cliplef
Keyword(s):  
Amino Acids ◽  
Growth Rate ◽  
Growth Performance ◽  
Meat Quality ◽  
Conversion Efficiency ◽  
Control Line ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Carcass Merit ◽  
Feeding Diets

Two experiments were conducted, using a total of 288 crossbred boars, gilts and barrows from the progeny of two Yorkshire sow lines, one kept as control, and the other selected for lower backfat thickness and increased growth rate for six generations. The lysine to DE (g MJ−1) levels used during grower (20 to 60 kg) and finisher (60 to 105 kg) periods, respectively, in the three diets (14.2 MJ DE kg−1) were: 1) 0.53 and 0.42 with no other supplemental amino acids except lysine, 2) 0.69 and 0.57 with supplemental threonine and methionine at a ratio of 0.65 and 0.30 to dietary lysine and 3) 0.85 and 0.72 with supplemental threonine and methionine at similar ratios as in diet 2. Feeding diets 2 and 3 increased (P < 0.05) the ADG and feed conversion efficiency of all pigs in both experiments, and this response was mainly during the grower period. Feeding diet 3 improved the growth rate more than diet 2 only in boars and gilts but not barrows. It also increased the feed conversion efficiency in exp. 2. The increased feed conversion efficiency response was higher in select than control line pigs, and in boars. Feeding diets 2 and 3 also improved the carcass merit but reduced the meat quality with an increased firmness and reduced marbling, juiciness, and flavour. The overall results indicated that an average daily intake of approximately 17 g of lysine (0.74 g MJ−1 DE), 11 g of threonine and 5 g of methionine during the grower period and 25 g lysine (0.62 g MJ−1 DE), 18 g threonine and 8 g methionine during finisher period optimized the growth performance, lean growth rate and carcass merit. This response tended to be higher in select than control line, and in boars and gilts than barrows. Key words: Lysine, amino acids, energy, growth, carcass, pigs

Some effects of dietary penicillin and zinc bacitracin on the performance of bacon pigs

1963 ◽  
Vol 5 (3) ◽  
pp. 251-257 ◽  
Author(s):  
D. W. Holme ◽  
K. L. Robinson
Keyword(s):  
Conversion Efficiency ◽  
Control Diet ◽  
Live Weight ◽  
Experimental Period ◽  
Carcass Composition ◽  
Significant Response ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Pig Performance ◽  
Zinc Bacitracin

SUMMARYThree experiments were carried out to evaluate zinc bacitracin as compared with penicillin, as a feed supplement for bacon pigs. The first experiment compared pig performance on a control diet with performance on the control diet supplemented with penicillin, 5 g./ton, or with zinc bacitracin, 10 g./ton. Experiment 2 compared the control diet with penicillin at 10 g./ton and zinc bacitracin at 10 g./ton with pigs housed in a different piggery. Experiment 3 compared the control diet with penicillin at 10 g./ton and zinc bacitracin at two levels, 10 g./ton and 5 g./ton. In none of the experiments was there any significant response to penicillin in terms of rate of gain, feed conversion efficiency or carcass composition. In the first experiment there was a small but significant improvement in rate of gain up to 100 lb. live-weight and for the whole experimental period by the pigs receiving 10 g./ton of zinc bacitracin. There was no significant response in feed conversion efficiency or carcass measurements. In the other two experiments there was no response to zinc bacitracin. The implications of the results are discussed.

Copper sulphate as a growth stimulant for pigs: effect of composition of diet and level of protein

1962 ◽  
Vol 4 (2) ◽  
pp. 177-183 ◽  
Author(s):  
I. A. M. Lucas ◽  
R. M. Livingstone ◽  
A. W. Boyne
Keyword(s):  
Conversion Efficiency ◽  
Copper Sulphate ◽  
Crude Protein ◽  
Fish Meal ◽  
Live Weight ◽  
Basal Diet ◽  
High Protein ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Low Protein

Thirty six individually-fed pigs were used in a within-litter comparison of the 6 treatments of a 3 × 2 factorial experiment. The pigs were about 9 weeks old at the start and were slaughtered as their individual weights reached about 200 lb.Three types of basal diet were given with and without a supplement of CuSO4.5H2O included at 0·1% (250 p.p.m. added Cu).The diets were based on (1) barley and fish meal, with 17% crude protein for pigs up to 103 lb. live-weight and 15·4 % from then on, (2) maize and soya (extracted soya bean meal), with about the same levels of protein and (3) maize and soya, but with only 13·4% crude protein for pigs up to 103 lb. and 11·9% for pigs of 103 lb. to 200 lb. Daily feed allowances were determined from a fixed scale based on live-weight.Pigs given the high-protein maize-soya diets grew more rapidly, required less feed per lb. gain and had fatter carcasses than those given the barley-fish meal diets. This was probably because of the higher TDN content of the maize-soya mixture.Pigs given the low-protein maize-soya diets grew less rapidly, required more feed per lb. gain and had fatter carcasses with smaller ‘eye’ muscles than those receiving the high-protein maize-soya diets, these being the usual effects of an inadequate supply of total protein or of an essential amino acid.CuSO4.5H2O4 added as 0·1% of each of the three types of diet improved growth rate before 103 lb. live-weight but had no consistent effect on feed conversion efficiency. Between 103 lb. and slaughter the copper sulphate did not affect performance on the barley-fish meal or high-protein maize-soya diet, but in the low-protein maize-soya diet it reduced feed conversion efficiency and rate of gain by 5%. Although this interaction was not statistically significant it agrees with an observation made in Florida and warrants further investigation.

Responses to variations in dietary energy intakes by growing pigs 2. The effects on feed conversion efficiency of changes in level of intake above maintenance

1972 ◽  
Vol 15 (2) ◽  
pp. 117-125 ◽  
Author(s):  
J. L. Davies ◽  
I. A. M. Lucas
Keyword(s):  
Conversion Efficiency ◽  
Research Council ◽  
Agricultural Research ◽  
Daily Intake ◽  
Live Weight ◽  
Growing Pigs ◽  
Dietary Energy ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Agricultural Research Council

SUMMARYAllowances of about 1·4M, 1·8M, 2·2M, 2·6M, 3·OM, and 3·4M (M = feed required for maintenance) were compared for pigs growing over the live-weight ranges 20·40, 40·60, 60·80, and 80·100 kg, with feed conversion efficiency (FCE) as the main response criterion.Response to increased digestible energy (DE) allowance was curvilinear; FCE improved rapidly up to 2·2M-2·6M, and changed much less with intakes above 2·6M. It is concluded that optimum FCE occurs at about 2·7M for pigs of 30 kg and at about 3·OM for pigs of 50, 70 and 90 kg.Allowances of dietary DE suggested by the Agricultural Research Council correspond to 2·56M, 2·95M, 3·04M and 3·08M for pigs of 30, 50, 70 and 90 kg live weight, respectively. It appears that these are near to the optima in promoting the best FCE.Changes of −25%, −15%, −5%, +5% and +15% in daily intake around the optimum levels caused FCE to deteriorate by averages of about 13%, 4·5%, <1%, <1% and 4·5% respectively. Daily weight gains would then change by about −34%, −18%, −5%, +4% and +10%, respectively.

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