Beneficial effects of dietary ascorbic acid supplement on hens subjected to ochratoxin A toxicosis under normal and high ambient temperatures

1993 ◽  
Vol 73 (1) ◽  
pp. 149-157 ◽  
Author(s):  
F. M. Haazele ◽  
W. Guenter ◽  
R. R. Marquardt ◽  
A. A. Frohlich
Keyword(s):  
Ascorbic Acid ◽  
Body Weight ◽  
Ochratoxin A ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Control Diet ◽  
Basal Diet ◽  
Weight Changes ◽  
Negative Effects

Three experiments were conducted to study ochratoxin A (OA) toxicity and the effect of supplemental ascorbic acid (AA) in laying hens housed under two environmental temperatures. In exp. 1, 18 hens were divided into three groups of six hens and fed diets containing either 0, 1.7, or 3.1 ppm OA for 14 d. In exps. 2 and 3, 24 hens were randomly assigned to four dietary treatments in six replications. Treatments consisted of a control and three diets containing either 300 ppm AA, 3 ppm OA, or 300 ppm AA plus 3 ppm OA. Treatment diets were fed for 14 d following the feeding of the basal diet for 14 d. The test-period temperature was 25 °C in exp. 1 and 2 and 33 °C in exp. 3. In exp. 1, feeding OA at 1.7 ppm significantly (P ≤ 0.05) decreased feed intake and increased liver weights and eggshell elasticity. At 3 ppm, OA significantly (P ≤ 0.05) reduced feed intake, body-weight change and egg production, and increased shell elasticity. Similar trends were also observed in exps. 2 and 3 when laying hens were fed 3 ppm OA compared with those fed the control diet. An analysis of plasma constituents showed that OA also increased Cl− concentration and aspartate transaminase activity and decreased plasma Ca++ concentrations. Exposing hens to 33 °C (compared with 25 °C) appeared to aggravate the negative effects of OA. All the negative effects of OA, apart from body-weight changes, reductions in feed intake, and increases in eggshell elasticity at 33 °C, were either moderated or significantly (P ≤ 0.05) reversed by dietary AA supplementation. The results suggest that some of the detrimental effects of OA in the diet of the laying hen can be counteracted by dietary supplementation of AA. Key words: Ochratoxin A, toxicity, ascorbic acid, hen, temperature

Effect of methionine and lysine supplementation of diets for laying hens, on production and feed intake

1976 ◽  
Vol 27 (5) ◽  
pp. 739 ◽  
Author(s):  
MW McDonald ◽  
IJ Bruce
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Egg Production ◽  
Function Analysis ◽  
Basal Diet ◽  
Metabolizable Energy ◽  
Feed Consumption ◽  
Multiple Regression Equation ◽  
Weight Changes ◽  
Egg Weight

Six diets containing five levels of methionine and two of lysme were each fed to 12 Leghorn and 12 Australorp pullets for a period of 16 weeks Body weight changes, egg production, egg weight and feed intake were measured Although responses to the diets did not differ significantly In univariate analyses, multrvarrate analysis lndicated a srgnificant interaction between breeds and diets. Increased methionine produced small, significant Increases In egg weight, although responses were inconsistent at different levels Body weight gains were not significantly different between diets. Egg production and feed consumption were significantly affected by diet?, but the pattern of response was also inconsistent. A discriminate function analysis showed a consistent response to increased methionine, which indicated that the basal diet was deficient and that the pullets required a total of 0 275% methionine in their diet Lysine supplementation produced a 'significant decrease In feed intake but had no significant effect on any other variable.A multiple regression equation relating metabolizable energy intake to the variables measured in the experiment was calculated and compared with others reported In the literature This was used to predict the requirements of the pullets for a number of essential amino acids.

scholarly journals Effect Of Supplementation Of Organic Acids On Laying Performance, Body Fatness And Egg Quality Of Hens

1970 ◽  
Vol 37 (2) ◽  
pp. 74-81 ◽  
Author(s):  
MS Rahman ◽  
MAR Howlider ◽  
M Mahiuddin ◽  
MM Rahman
Keyword(s):  
Body Weight ◽  
Organic Acids ◽  
Organic Acid ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Basal Diet ◽  
Feed Conversion ◽  
Egg Weight

The study was conducted to determine the effect of organic acids supplementation on body weight changes, feed intake, feed efficiency, egg production, egg weight and egg quality in laying hens at age between 67 and 74 weeks. A total of 48 Shaver 579 laying hens of 67 weeks age were allotted into 4 groups, each containing 12 hens. The hens were fed basal diet (17% CP and 2800 kcal ME/kg diet) supplemented with 0 (T1), 260 (T2), 520 (T3) and 780 ppm (T4) of organic acid mixture (fumaric acid and salt of butyric, propionic and lactic acids). The results revealed no effect of organic acids supplementation on body weight change and feed intake but improvement of egg production and feed conversion were observed. Organic acids supplementation significantly increased egg production by about 2.26, 8.0 and 9.84% on 260, 520 and 780 ppm respectively when compared with the untreated group (P<0.05). Feed conversion showed a significant (P<0.05) improvement in laying hen groups which fed on the basal diet supplemented with organic acids at 260, 520 and 780 ppm by about 1.85, 8.48 and 7.74% respectively when compared with the control. On the other hand, dietary organic acid had no effect on the average egg weight, while showed a lower percentage of large (P<0.05) and extra large egg (P<0.01) size compared with control group. Body composition parameters were not affected (P>0.05) by dietary treatments. Inclusion of organic acids improved egg shell thickness (P<0.05) while significantly reduced albumen index (P<0.05). Incorporation of organic acids attributed to significant increase per cent albumen (P<0.01) and significant decrease in yolk per cent (P<0.05). It can be concluded that organic acid supplementation of laying hens diet may improve persistency of lay and feed conversion. From economical point of view, it is concluded that organic acid addition (520 ppm) may result an economic benefit of layer production at older age. DOI: http://dx.doi.org/10.3329/bjas.v37i2.9884 BJAS 2008; 37(2): 74-81

scholarly journals Warm Perches: A Novel Approach For Reducing Cold Stress Effect on Production, Plasma Hormones, and Immunity in Laying Hens

2021 ◽  
Author(s):  
Jiaying Hu ◽  
Heng Wei Cheng
Keyword(s):  
Body Weight ◽  
Cold Stress ◽  
Cold Exposure ◽  
Feed Intake ◽  
Plasma Levels ◽  
Egg Production ◽  
Laying Hens ◽  
Plasma Concentrations ◽  
Economic Losses ◽  
Stress Effect

Abstract Background: Cold temperature is a common environmental stressor that has a great impact on the poultry industries, inducing pathophysiological stress in birds with profound economic losses. Current methods used for preventing cold stress, such as reducing ventilation and using gas heaters, are facing challenges due to poor indoor air quality and its deleterious effects on bird and caretaker health. The aim of this study was to examine if the novelly designed warmed perch system, as a thermal device, can reduce cold stress-associated adverse effects on laying hens. Methods: Seventy-two 32-week-old DeKalb hens were randomly assigned to 36 cages arranged to 3 banks. The banks were assigned to 1 of 3 treatments: cages with warmed perches (WP; perches with circulating water at 30 oC), air perches (AP, regular perches only) or no perches (NP) for a 21- day trial. The room temperature was set at 10 oC during the entire experimental period. Rectal temperature and body weight were measured from the same bird of each cage at day 1, 8, 15, and 21 during the cold exposure. Egg production was recorded daily. Feed intake, egg and eggshell quality were determined during the 1st and 3rd week of cold stress. Plasma levels of corticosterone, thyroid hormones (3, 3’, 5-triiodothyronine and thyroxine), interleukin (IL)-6 and IL-10, were determined at day 1 and 21 post initiation of cold exposure. Results: Compared to both AP and NP hens, WP hens were able to maintain their body temperature without increasing feed intake and losing body weight. The eggs laid by WP hens had thicker eggshell during the 3rd week of cold exposure. Warmed perch hens also had a lower thyroxine conversion rate (3, 3’, 5-triiodothyronine/thyroxine) at day 1, while higher plasma concentrations of IL-6 at day 21. Plasma levels of corticosterone, 3, 3’, 5-triiodothyronine, and IL-10 were not different among treatments. Conclusions: Our results indicate that the warmed perch system can be used as a novel thermal device for preventing cold stress-induced negative effects on hen health and welfare through regulating innate immunity and metabolic hormonal homeostasis.

scholarly journals Effects of supplementing various linoleic to α-linolenic acid ratios and vitamin A on production performance and egg characteristics of laying hens during summer months

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Muhammad Naeem Tahir
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Vitamin A ◽  
Linolenic Acid ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Body Weight Gain ◽  
Production Performance ◽  
Dietary Treatments

In the present feeding trial, responses of laying hens, kept at high ambient temperature, to various dietary ratios of linoleic acid (LNA) to α-linolenic acid (ALA) and vitamin A levels on performance and egg characteristics were evaluated. A total of 360, 40-wk-old, Leghorn laying hens were fed on diets with various combinations of canola oil and linseed oil to achieve LNA to ALA dietary ratios of 20:1, 10:1, 4:1, 2:1, 1:1 and 1:2, each supplemented with 3000 IU or 10000 IU vitamin A/kg of diet. The diets were fed in a 6×2 factorial Completely Randomized Design that continued for 12 weeks. Feed intake, weight gain, egg production and egg quality traits were recorded during the trial. Decreasing dietary LNA to ALA ratio in the diet affected negatively (P<0.05) on body weight gain and yolk percentage in laying hens. While, feed intake, hen-day and hen-housed egg production, feed conversion ratio (FCR) per dozen of eggs and shell quality remained unaffected (P>0.05) by dietary treatments, with the exception of FCR per kg eggs, egg weight and egg-shell thickness which responded significantly (P<0.05) to various dietary treatments. Although the dietary ratio of LNA to ALA of 4:1 or less could produce eggs by the hens with desirable quantities of n-6 and n-3 poly unsaturated fatty acids – that are characteristics of functional diets – the performance of laying hens in terms of body weight gain and egg-yolk percentage was slightly compromised.

Effect of an ethanolic extract from Enterolobium cyclocarpum pods on feed intake, egg production, and plasma lipid profile of laying hens

2021 ◽  
Vol 31 ◽  
pp. 1-8
Author(s):  
Ronald Herve Santos Ricalde ◽  
Paloma Lopez Lopez ◽  
Luis Sarmiento Franco ◽  
Carlos Sandoval Castro ◽  
Jose Segura Correa ◽  
...  
Keyword(s):  
Lipid Profile ◽  
Total Cholesterol ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Control Diet ◽  
Plasma Lipid ◽  
Ethanolic Extract ◽  
Plasma Lipid Profile ◽  
Enterolobium Cyclocarpum

There is concern about egg cholesterol content. In this study, the effect of an ethanolic extract from Enterolobium cyclocarpum (EEEC) pods in laying hen diets on egg production and plasma lipid profile was investigated. EEEC was added in 0 mg/kg, 60 mg/kg, 120 mg/kg, 240 mg/kg, and 480 mg/kg to the diets. Feed intake was lower in laying hens fed diets with 480 mg/kg of EEEC (p < 0.05). Albumen was less heavy and wide in laying hens fed diets with EEEC, in comparison to those in the control diet (p < 0.05). No significant effect of EEEC on cholesterol in plasma was observed (p < 0.08); however, a significant increase of high-density lipids (HDL) in proportion of total cholesterol was observed in hens supplemented with 120 mg/kg of EEEC (p < 0.05). In conclusion, EEEC reduced albumen weight and wide in eggs, and 120 mg/kg of EEEC in the diet increased HDL in proportion to total cholesterol in blood.

Feed intake, digestibility and growth performance of Dorper-Menz cross bred sheep fed local brewery by-product (Atella) and concentrate mixture at different levels of combination

2020 ◽  
Vol 5 (6) ◽  
pp. 184-190
Author(s):  
M Kokeb ◽  
◽  
Y Mekonnen ◽  
M Tefera ◽  
◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Intake ◽  
Body Weight Gain ◽  
Block Design ◽  
Basal Diet ◽  
Weight Changes ◽  
Fecal Samples ◽  
Concentrate Mixture ◽  
Concentrate Mix

The aim of this experiment was to evaluate the effect of graded level of local brewery by-product (atella) replacement to concentrate mixture on feed intake; digestibility and bodyweight change of Dorper-Menz crossbred lambs fed hay basal diet. The feeding period of 90 days was preceded by 15 days of acclimatization period. The experimental design was randomized complete block design with five treatments: T1 [control, hay ad libtium], T2 [25% atella + 75% concentrate mix]; T3 [50% atella + 50% concentrate mix]; T4 [75% atella + 25% concentrate mix] and T5 [100% atella]. Body weight changes were monitored fortnightly for 112 days. At the end of experiment, animals were fitted with feces collection bags and daily feces excretion was collected for seven days. Fecal output of each animal was thoroughly mixed and 20% of the voided feces were sampled to make a composite of fecal samples for each animal over the collection period. The fecal samples were stored frozen at -20°C until processing for chemical analysis. Data on feed intake, body weight change, and digestibility were subjected to analysis of variance using the General Linear Model procedure. The protein and energy contents of atella are high enough to increase intake, digestibility and could be categorized as medium protein feed. Atella alone or at different level with commercial concentrate mixture has significantly increased body weight gain of crossbred sheep. The positive weight gain results of atella supplemented group clearly indicate supplementation of dried atella could be recommended for fattening Dorper-Menz crossbred male lamb. Atella may lose some volatile nutrients during drying process and further research is needed to compare wet atella with dried one.

Effects of protamine zinc insulin on chickens

1965 ◽  
Vol 208 (3) ◽  
pp. 589-592 ◽  
Author(s):  
S. Lepkovsky ◽  
R. Len ◽  
T. Koike ◽  
R. Bouthilet
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Body Weight ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Protamine Zinc Insulin ◽  
The Central Nervous System

The injection of protamine zinc insulin into laying hens caused hypoglycemia as it does in other animals. While it increased feed intake and body weight in other animals, it did the opposite in chickens: it decreased feed intake, body weight, and egg production. Damage to the central nervous system in some of the chickens was indicated by their behavior. It was tentatively concluded that the aphagia in chickens following injection with protamine zinc insulin was due to the apparent damage to the nervous system.

scholarly journals Egg production, egg quality, and lipid peroxidation status in laying hens maintained at a low ambient temperature (6°C) and fed a vitamin C and vitamin E-supplemented diet

2012 ◽  
Vol 48 (No. 1 - 2) ◽  
pp. 33-40 ◽  
Author(s):  
O. Kucuk ◽  
N. Sahin ◽  
K. Sahin ◽  
Gursu MF ◽  
F. Gulcu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Vitamin E ◽  
Vitamin C ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Basal Diet ◽  
Alpha Tocopherol ◽  
Tocopherol Acetate ◽  
Egg Shell

This experiment was conducted to evaluate the effects of vitamin C (L-ascorbic acid) and vitamin E (&alpha;-tocopherol acetate) on egg production, egg quality, lipid peroxidation status (measured as MDA), and some serum metabolites in laying hens (Hy-Line) maintained at a low ambient temperature (6&deg;C). One hundred and twenty laying hens (18-wk-old) were divided into four groups, 30 hens per group. The laying hens were fed either a basal diet or the basal diet supplemented with either 250 mg of L-ascorbic acid/kg of diet, 250 mg of &alpha;-tocopherol acetate/kg of diet or 250 mg of L-ascorbic acid plus 250 mg of &alpha;-tocopherol acetate/kg of diet. Although feed consumption of the hens was similar (P &gt; 0.05) among treatments, supplemental vitamin C and E significantly increased final body weight, egg production, and improved feed efficiency (P &lt; 0.05). Egg weights were also greater (P &lt; 0.05) in hens supplemented with the combination of vitamin C and E than that of hens supplemented either vitamin or no vitamin (control). Haugh unit did not change upon each vitamin supplementation, but the combination of the vitamin supplement yielded a higher Haugh unit (P &lt; 0.05). Each dietary supplement of vitamin C and vitamin E improved the egg quality (P &lt; 0.05) resulting in a greater specific gravity, thicker egg shell, and heavier egg shell weight. Separately or as a combination, supplemental vitamin C and E decreased MDA, glucose, cholesterol, and triglyceride concentrations (P &lt; 0.05). Results of the present study showed that supplementing vitamin C and vitamin E, particularly as a combination, improved the performance of cold-stressed laying hens, offering a potential protective management practice in preventing cold stress-related losses in performance of laying hens. Results of the present study also indicated that the effects of vitamin C and vitamin E are additive.

PERFORMANCE OF LAYING HENS FED DIETS CONTAINING SOYBEAN GUMS, RAPESEED GUMS OR RAPESEED MEALS WITH AND WITHOUT GUMS

1981 ◽  
Vol 61 (4) ◽  
pp. 1031-1040 ◽  
Author(s):  
H. W. HULAN ◽  
F. G. PROUDFOOT
Keyword(s):  
Body Weight ◽  
Fatty Liver ◽  
Egg Production ◽  
Laying Hens ◽  
Control Diet ◽  
Egg Weight ◽  
General Performance ◽  
Mere Presence ◽  
Per Se ◽  
Sensitive Genotype

Two experiments were conducted to study the effect of soybean and/or rapeseed gums (SBG and/or RSG) on general performance and mortality of laying hens. In exp. 1 a total of 1824 SCWL hens of two commercial genotypes (912 of each) were fed a corn-soy-based control diet or this diet to which was added 2.0% be weight of either SBG or RSG. In exp. 2, 1824 hens of the more sensitive genotype used in exp. 1 were fed a control diet or diets containing approximately 15% of gummed and gumless Tower and Candle rapeseed mean (RSM) or gumless Tower RSM to which was added 3.33% Candle gums. The addition of SBG and RS3 to the diet (exp. 1) caused a significant increase in mortality, increased the amount of feed required to produce a kilogram of eggs, and decreased heart and liver weights. Feeding RSM with and without the commercial level (2.0% of the RSM, or in this study 0.3% of the diet) of added gums had no effect on body weight or egg weight. Hen-housed egg production and feed per dozen eggs were significantly depressed by feeding Candle RSM with gums and by feeding gumless Tower RSM to which had been added Candle gums, indicating that Candle gums but not Tower gums are deleterious to laying hens even at the commercial level of addition to RSM. Accumulated mortality to 497d was significantly higher for all groups fed RSM with or without gums compared to the control-fed group. The increase in mortality with this sensitive genotype appeared to be related to the mere presence of RSM in the diet and not due to the presence of gums per se. The major cause of mortality in both experiments was diagnosed as fatty liver syndrome, and from results of exp. 2 appeared to be related to the presence of RSM in the diet and not due to the presence of gums.

scholarly journals RESPONSE OF WHITE LEGHORNS TO DIETS CONTAINING GROUND OR WHOLE TRITICALE

1987 ◽  
Vol 67 (2) ◽  
pp. 583-585 ◽  
Author(s):  
S. LEESON ◽  
J. D. SUMMERS
Keyword(s):  
Body Weight ◽  
Key Words ◽  
Feed Intake ◽  
Egg Production ◽  
Laying Hens ◽  
Energy Value ◽  
White Leghorns

Growing leghorn pullets and laying hens were fed diets containing triticale as the sole cereal source. Body weight of pullets was not affected (P > 0.05) by up to 70% dietary inclusion of triticale. When layer diets contained 70% whole or ground triticale in place of corn, egg production was depressed (P < 0.05) while birds consumed more feed (P < 0.05). The feed intake effect is discussed in relation to the energy value of triticale. Key words: Triticale, pullets

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