Influence of Citric Acid and Microbial Phytase on Growth Performance and Carcass Characteristics of Broiler Chickens

Nourmohammadi, Rouhollah; Hosseini, Seyed Mohammad; Farhangfar, H

doi:10.3844/ajavsp.2010.282.288

Cited by 16 publications

(15 citation statements)

References 23 publications

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“…If applied correctly, organic acids function in poultry, not only as a growth promoter but also as a meaningful mechanism for controlling both pathogenic and non-pathogenic bacteria (Wolfenden et al, 2007). Moreover, feeding organic acids are believed to have several beneficial effects such as improving feed conversion ratio, growth performance, enhancing mineral absorption and speeding recovery from fatigue (Zeinb, 2004;Nourmohammadi et al, 2010b). The antibacterial activity of organic acids is related to reduction of pH, as well as their ability to dissociate that is determined by the pKa-value of the respective acid and pH of the surrounding environment, because the antibacterial activity increases with decreasing pH value.…”

Section: Discussionmentioning

confidence: 99%

Plasma Thyroid Hormone Concentrations and pH Values of Some GI-Tract Segments of Broilers Fed on Different Dietary Citric Acid and Microbial Phytase Levels

Nourmohammadi¹

2011

American Journal of Animal and Veterinary Sciences

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Problem statement: An experiment was conducted to study the effect of microbial phytase supplementation and citric acid on thyroid activity, relative weight of lymphoid organs and pH values of some GI-tract segments in broiler chickens fed corn-soybean meal based diets. Approach: The data was analyzed using a Randomized Complete Block Design (RCBD) with factorial arrangement of 3×3, three levels of citric acids (0, 3 and 6%) and three levels of phytase (0, 500 and 1000 IU kg). There were three replicates (with ten chicks in each replicate) for each treatment. A total of 270 Ross 308 broiler chicks were used. Results: Addition of citric acid to diets caused significant decrease in pH values of crop, gizzard, duodenum, jejunum and ileum (p<0.05) and caused significant increase (p<0.01) in plasma triiodothyronine (T 3 ) concentration, T 3 :T 4 ratio and relative weight of bursa and thymus, but had no significant effect on thyroxin (T 4 ) concentrations. Microbial phytase significantly increased relative weight of thymus (p<0.01), but had no significant effects on thyroid gland activity, relative weight of bursa and values of pH in different parts of the GI-tract. Conclusion: Broiler chicks fed on acidifiers diets had better immune response resistance that lead to immunological advances. Also, decreasing pH in GI-tract by CA caused a beneficial effect in the inhibition of intestinal bacteria competition.

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Section: Discussionmentioning

confidence: 99%

Plasma Thyroid Hormone Concentrations and pH Values of Some GI-Tract Segments of Broilers Fed on Different Dietary Citric Acid and Microbial Phytase Levels

Nourmohammadi¹

2011

American Journal of Animal and Veterinary Sciences

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“…Previous studies were inconsistent; Wickramasinghe et al (2014) reported that 2% dietary CA had no significant effect on the pancreas, gizzard and liver weights and ratios. Similarly, Nourmohammadi et al (2010) showed that supplementation of 3 or 6% CA to broiler diet did not significantly affect liver weight. However, the relative weight of proventriculus and gizzard increased significantly by 6% CA.…”

Section: Digestive Tract Parameters and Immune Organsmentioning

confidence: 95%

“…The authors attributed the reduction in the feed intake to the strong taste associated with the organic acids which would have decreased the palatability of the feed, thereby reducing feed intake. Also, Nourmohammadi et al (2010) reported positive effects from the utilization of 3% CA in broiler diets. They concluded that CA provided suitable pH in the gut for proteolytic enzymes activity and increased feed digestion by a reduction in the gut microflora.…”

Section: Table (1 B) Formulation and Chemical Analysis (Calculated mentioning

confidence: 96%

“…Additionally, slaughter characteristics of broiler chickens did not differ significantly as affected by various organic acids (butyric, FUA and lactic acid at 2 and 3% of the diet; Adil et al, 2011b). Also, Nourmohammadi et al (2010) showed that 3 or 6% of CA supplemented to broiler diet had no significant effect on abdominal fat weight.…”

Section: Carcass Characteristicsmentioning

confidence: 97%

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Interaction Effect of Dietary Crude Protein and Organic Acids on Growth Performance, Carcass Characteristics and Immune Organs of Broiler Chicks

Attia

El-Haliem

Saber

et al. 2018

Egyptian Journal of Nutrition and Feeds

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n experiment was designed to investigate the effect of feeding two crude protein levels (PL): Required protein level (RPL), 2% lower (LPL) and two organic acids (OA; citric, CA and fumaric, FUA) each at 0, 1.5 and 3% of the diet on the productive performance of broiler chicks (0-6 wks of age). Two hundred eighty-eight one-day old unsexed chicks (Cobb 500) were randomly divided into 12 treatments of 3 replicates (8 chicks each). Three types of corn-soybean meal diets were fed. Starter diet (0-3 wks of age; contained 23 and 21% crude protein, CP), grower diet (4-5 wks of age; contained 20 and 18% CP) and finisher diet (the 6 th wk of age; contained 18 and 16% CP). Diets were formulated to be isocaloric (3200 Kcal/Kg diet). Average daily gain (ADG) and average daily feed intake (ADFI) were significantly increased for most periods with RPL diets. Feed and caloric conversion ratios (FCR and CCR) were significantly improved with RPL (starter) or LPL diets (finisher). Crude protein conversion ratio (CPCR) was improved (P<0.05) with LPL diets during all periods. Dressing, meat %, and meat to bone or fat ratios were increased (P≤0.05) and abdominal fat % was decreased with RPL diets while LPL diets increased bursa and proventriculus %. Bursa % was significantly increased due to CA addition. The highest ADFI and the worst (P<0.05) FCR, CPCR and CCR were recorded with 0% OA diets compared with 1.5% or 3% diets. The highest significant dressing % and meat: fat ratio and the lowest (P<0.05) abdominal fat % were obtained with 1.5% OA diets. Diets supplemented with 3% OA significantly improved thymus %. Significant differences in growth performance and carcass criteria due to the combined effects of PL, OAT and OAL were obtained. Diet of RPL+ 1.5% CA increased (P<0.05) ADG (starter and finisher), percentages of giblets, liver, dressing, meat: fat ratio and decreased abdominal fat. However, RPL+1.5% FUA diets significantly improved ADG (grower and total periods), FCR, CPC and CCR. The highest values of thymus and bursa were reported with RPL+ 3% CA diet. No mortality was recorded with RPL or LPL+1.5 CA or FUA diets.

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“…D or Ca of chickens fed a diet containing 0, 0.25, 0.75 and 1.25% CA (Islam et al, 2010). In addition, CA affected mineral utilization, but did not affect the plasma mineral contents (Nourmohammadi et al, 2010). These differences in the response to CA may be due to strain differences, dietary composition, hygienic conditions and the hormonal balance responsible for maintaining Ca and P homeostasis (Fraser, 1988).…”

Section: Hemato-biochemical Parametersmentioning

confidence: 99%

Effect of Adding Some Antioxidants to Diet Containing Fatty Acids on Productive and Some Physiological Parameters of Silver Montazah Chickens Strain. 2-During Laying Period

Bahakaim¹,

Assaf²,

Osman³

et al. 2018

Egyptian Journal of Nutrition and Feeds

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n experiment was conducted for a period of 12 wks to investigate the effect of some antioxidants in the diet on productive performance and some physiological and hematological parameters as well as fertility and hatchability of chickens. For this purpose, 231 Silver Montazah strain birds (210 hens and 21 cocks) 24-wks-old were used in this experiment up to 36 wks of age. All birds were individually weighed and randomly divided into 7 equal experimental groups (30 hens and 3 cocks of each) with three replicates (10 hens and 1 cock each) with almost similar initial average body weight. Replicates were randomly housed in floor pens (280 cm long x 220 cm wide). The 1 st group was fed the basal diet that supplemented linoleic acid (n-6) and linolenic acid (n-3) at the ratio of 4:1, respectively and served as control. The 2 nd and 3 rd groups were fed the basal diet supplemented with 125 and 250 g Butylated Hydroxy Toluene/ton diet, respectively. The 4 th and 5 th groups were fed the basal diet supplemented with 100 and 200 g vit. E /ton diet, respectively. The 6 th and 7 th groups were fed the basal diet supplemented with 5 and 10 kg citric acid/ton diet, respectively. Results indicated that antioxidants supplementation significantly increased egg number, egg production percentage and egg mass and improved feed conversion ratio and egg shell thickness compared to the control group. Moreover, significant increase was obtained for blood hemoglobin, red blood cells and white blood cells, as well as plasma total protein, globulin and high density lipoproteins for groups fed antioxidants compared with the control group. Ejaculate volume, sperm motility, live sperm percentage, sperm concentration, total sperm per ejaculate and total live sperm per ejaculate, as well as fertility and hatchability percentages were increased. Conversely, significant lower heterophils/lymphocytes ratio and plasma concentration of total lipids, cholesterol, triglycerides and lowdensity lipoproteins were associated with supplemental antioxidants, while abnormal sperm percentage was decreased with antioxidants supplementation. In conclusion, dietary supplemental of some antioxidants to feed containing fatty acids is a practical application recommended especially by 100 and 200 g vit. E or 10 kg citric acid/ton diet to Silver Montazah chickens strain during the laying period and had beneficial effects on productive, reproductive, physiological and hematological parameters and immune status.

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Influence of Citric Acid and Microbial Phytase on Growth Performance and Carcass Characteristics of Broiler Chickens

Cited by 16 publications

References 23 publications

Plasma Thyroid Hormone Concentrations and pH Values of Some GI-Tract Segments of Broilers Fed on Different Dietary Citric Acid and Microbial Phytase Levels

Plasma Thyroid Hormone Concentrations and pH Values of Some GI-Tract Segments of Broilers Fed on Different Dietary Citric Acid and Microbial Phytase Levels

Interaction Effect of Dietary Crude Protein and Organic Acids on Growth Performance, Carcass Characteristics and Immune Organs of Broiler Chicks

Effect of Adding Some Antioxidants to Diet Containing Fatty Acids on Productive and Some Physiological Parameters of Silver Montazah Chickens Strain. 2-During Laying Period

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