Vahel Taha | University of Duhok (original) (raw)

Papers by Vahel Taha

Research paper thumbnail of The effect of supplemented chestnut tannin to grass silage either at ensiling or at feeding on lamb performance, carcass characteristics and meat quality

Agricultural and Food Science, Aug 8, 2022

Research paper thumbnail of Effect of silage additive (tannin or inoculate) on protein degradability of legume and grass silages

Implications Undegradable protein supply from forages can be increased by incorporation of tannin... more Implications Undegradable protein supply from forages can be increased by incorporation of tannin at ensiling. Introduction Tannin has the ability to bind with different compounds such as protein and carbohydrate to form complex undegradable molecules. Tannin protein complexes formed in the rumen pH (6-7) can disassociate post-ruminally in the abomasum (pH< 3.5) facilitating digestion in the small intestine. As a consequence, rumen degradable protein supply is reduced and undegradable protein supply is increased (Muller-Harvey, 2006). Salawu et al. (1999) have reported an improvement of silage quality (low pH and NH3-N) as a result of incorporating tannin at the point of ensiling. McMahon et al. (2000) reported that the absorption of dietary amino acid in the small intestine was increased when the diet contained tannin. The aims of this study is to evaluate, using an in situ (nylon bag) technique, the potential hydrolysable tannin to reversibly bind with plant protein during ensi...

Research paper thumbnail of Effect of tannin or inoculum as silage additives on silage quality and rumen fermentation kinetics

Tannin has the ability to bind with different compounds including protein and carbohydrate to for... more Tannin has the ability to bind with different compounds including protein and carbohydrate to form complex undegradable compounds. Tannin-protein complexes form in the rumen (pH 6-7) and disassociate in the abomasum (pH< 3.5) enhancing duodenal supply of dietary protein. The in vitro gas production technique can be used to predict rumen fermentation kinetics. The effect of additional tannin (hydrolysable, chestnut) and a bacterial inoculant as additives at ensiling on final silage quality and in vitro rumen fermentation kinetics were investigated. Whole crop grass, pea and bean forages were harvested on 07/14/2011 and ensiled in triplicate in experimental silos (25kg). Prior to ensiling each forage was treated with one of 4 additives: 40g/kg fresh weight (FW) tannin (HT), 20g/kg FW tannin (LT), an inoculant (L. plantarum) 106 colony-forming units/g FW (In), or untreated (C). A standard volume of water (1 ml. /kg FW) was applied to all treatments. Silos were opened after 100 days ...

Research paper thumbnail of Effect of supplemental tannin on silage quality and animal performance

Tannin has the ability to reversibly complex with forage protein s . A series of experiments were... more Tannin has the ability to reversibly complex with forage protein s . A series of experiments were conducted to test the effect of supplementary chestnut hydrolysable tannin (HT) on a variety of forage s to reduce protein degradability. Experiment 1 in vestigated the effect of additional HT to different forages on ensiling characteristics and rumen degradability. Tannin was applied prior ensiling at either 40g kg - 1 FW high tannin (HiT), or 20g kg - 1 FW low tannin (LT). An inoculant treatment ( L. plantarum ) 10 6 CFUg - 1 FW (Inoc) as a positive control and untreated (W) as a negative control. Water addition was unified by adding 0.5 l kg - 1 FW and forages ensiled for 100d. Addition of tannin reduced (P<0.01) silage NH 3 - N concentration (42, 49, 56 and 60g kg - 1 TN for HiT, LT, Inoc and W respectively). Tannin supplementation was found to r educe ( P <0.05) DM and CP effective rumen degradability Experiment 2, evaluated the effect of additional HT (30g kg - 1 DN) to rye ...

Research paper thumbnail of Using a Mix of Three Microbial Strains on Fermentation and Aerobic Stability of Grass Silage

Springer Proceedings in Earth and Environmental Sciences, 2019

This study was conducted to investigate the effect of using a mix of Lactobacillus (L.) plantarum... more This study was conducted to investigate the effect of using a mix of Lactobacillus (L.) plantarum, L. casei and Saccharomyces cerevisiae as silage inoculate to meadow grass on silage fermentation characteristics, silage quality and aerobic stability. A sample of Meadow grass (MG) was collected directly from the forage harvester during a first cut harvest. The fresh, chopped MG sample was divided into 2 equal portions and either treated with the test additive (EM) or received an equal volume of water (control). The dosage of EM Silage was based on 80 ml per ton product. Samples were analysed statistically as randomise complete (1 × 2) design using an ANOVA procedure of Genstat 15. Ensiled sample was found to have lower dry matter (DM), crude protein (CP), water soluble carbohydrate (WSC) and yeasts count, and higher mould count compared fresh samples. Additionally, treating MG with EM increased concentration of total volatile fatty acids (tVFA), acetic and propionic acids and total a...

Research paper thumbnail of Effect of Using Quercus Infectoria Galls in The Diet on Sheep Performance in Late Pregnancy And Early Lactation

The Journal of the University of Duhok

Research paper thumbnail of A Survey Study Of Sheep And Goats Raised Under Farm Conditions

Research paper thumbnail of Effect of supplemental tannin (chestnut) at feeding on rumen pH and protozoa number in vivo

Research paper thumbnail of Effect of Fattening Period on Growth Rate and Carcass Characteristics of Meriz and Local Black Goats a Thesis Submitted to the Council of the College of Agriculture University of Dohuk as a Partial

Supervised by Prof. Dr. Jalal E. Alkass _____________________________________________ January kan... more Supervised by Prof. Dr. Jalal E. Alkass _____________________________________________ January kanina dowe muharam 2009 2708 1430

Research paper thumbnail of Nutrition & Husbandry Effect of Fattening Period on Growth Rate and Carcass Charactristics of Meriz and Black Goats

This study was carried out at the Animal Farm, Animal Production Department, College of Agricultu... more This study was carried out at the Animal Farm, Animal Production Department, College of Agriculture, University of Duhok, where 10 Meriz goats averaged 13.65 kg weight and 3-4 months old and 10 Black goats averaged 30.3 kg weight and 6 months old were randomly divided into two groups and allocated to be fattened for either 90 or 150 days. Result revealed that the daily gain, feed efficiency, dressing percentage based on live body weight, rib eye area and fat thickness, lean, fat and bone percentage averaged 98.73gm, 5.12 kg/kg, 46.96%, 9.44cm 2 , 1.15 mm, 64.07%, 16.89 % and 19.02 % respectively for Meriz, while the corresponding values for Black goat were 75.58 gm, 6.43 kg/kg, 49.42 %, 12.47 cm 2 , 1.75 mm, 63.73 %, 16.82 % and 19.44 %, respectively. No significant differences between 90 and 150 days fattening period was observed in all studied traits except some commercial cuts.

Research paper thumbnail of Nutrition & Husbandry Effect of Fattening Period on Growth Rate and Carcass Charactristics of Meriz and Black Goats

This study was carried out at the Animal Farm, Animal Production Department, College of Agricultu... more This study was carried out at the Animal Farm, Animal Production Department, College of Agriculture, University of Duhok, where 10 Meriz goats averaged 13.65 kg weight and 3-4 months old and 10 Black goats averaged 30.3 kg weight and 6 months old were randomly divided into two groups and allocated to be fattened for either 90 or 150 days. Result revealed that the daily gain, feed efficiency, dressing percentage based on live body weight, rib eye area and fat thickness, lean, fat and bone percentage averaged 98.73gm, 5.12 kg/kg, 46.96%, 9.44cm 2 , 1.15 mm, 64.07%, 16.89 % and 19.02 % respectively for Meriz, while the corresponding values for Black goat were 75.58 gm, 6.43 kg/kg, 49.42 %, 12.47 cm 2 , 1.75 mm, 63.73 %, 16.82 % and 19.44 %, respectively. No significant differences between 90 and 150 days fattening period was observed in all studied traits except some commercial cuts.

Research paper thumbnail of The effect of supplemented chestnut tannin to grass silage either at ensiling or at feeding on lamb performance, carcass characteristics and meat quality

Agricultural and Food Science, Aug 8, 2022

Research paper thumbnail of Effect of silage additive (tannin or inoculate) on protein degradability of legume and grass silages

Implications Undegradable protein supply from forages can be increased by incorporation of tannin... more Implications Undegradable protein supply from forages can be increased by incorporation of tannin at ensiling. Introduction Tannin has the ability to bind with different compounds such as protein and carbohydrate to form complex undegradable molecules. Tannin protein complexes formed in the rumen pH (6-7) can disassociate post-ruminally in the abomasum (pH< 3.5) facilitating digestion in the small intestine. As a consequence, rumen degradable protein supply is reduced and undegradable protein supply is increased (Muller-Harvey, 2006). Salawu et al. (1999) have reported an improvement of silage quality (low pH and NH3-N) as a result of incorporating tannin at the point of ensiling. McMahon et al. (2000) reported that the absorption of dietary amino acid in the small intestine was increased when the diet contained tannin. The aims of this study is to evaluate, using an in situ (nylon bag) technique, the potential hydrolysable tannin to reversibly bind with plant protein during ensi...

Research paper thumbnail of Effect of tannin or inoculum as silage additives on silage quality and rumen fermentation kinetics

Tannin has the ability to bind with different compounds including protein and carbohydrate to for... more Tannin has the ability to bind with different compounds including protein and carbohydrate to form complex undegradable compounds. Tannin-protein complexes form in the rumen (pH 6-7) and disassociate in the abomasum (pH< 3.5) enhancing duodenal supply of dietary protein. The in vitro gas production technique can be used to predict rumen fermentation kinetics. The effect of additional tannin (hydrolysable, chestnut) and a bacterial inoculant as additives at ensiling on final silage quality and in vitro rumen fermentation kinetics were investigated. Whole crop grass, pea and bean forages were harvested on 07/14/2011 and ensiled in triplicate in experimental silos (25kg). Prior to ensiling each forage was treated with one of 4 additives: 40g/kg fresh weight (FW) tannin (HT), 20g/kg FW tannin (LT), an inoculant (L. plantarum) 106 colony-forming units/g FW (In), or untreated (C). A standard volume of water (1 ml. /kg FW) was applied to all treatments. Silos were opened after 100 days ...

Research paper thumbnail of Effect of supplemental tannin on silage quality and animal performance

Tannin has the ability to reversibly complex with forage protein s . A series of experiments were... more Tannin has the ability to reversibly complex with forage protein s . A series of experiments were conducted to test the effect of supplementary chestnut hydrolysable tannin (HT) on a variety of forage s to reduce protein degradability. Experiment 1 in vestigated the effect of additional HT to different forages on ensiling characteristics and rumen degradability. Tannin was applied prior ensiling at either 40g kg - 1 FW high tannin (HiT), or 20g kg - 1 FW low tannin (LT). An inoculant treatment ( L. plantarum ) 10 6 CFUg - 1 FW (Inoc) as a positive control and untreated (W) as a negative control. Water addition was unified by adding 0.5 l kg - 1 FW and forages ensiled for 100d. Addition of tannin reduced (P<0.01) silage NH 3 - N concentration (42, 49, 56 and 60g kg - 1 TN for HiT, LT, Inoc and W respectively). Tannin supplementation was found to r educe ( P <0.05) DM and CP effective rumen degradability Experiment 2, evaluated the effect of additional HT (30g kg - 1 DN) to rye ...

Research paper thumbnail of Using a Mix of Three Microbial Strains on Fermentation and Aerobic Stability of Grass Silage

Springer Proceedings in Earth and Environmental Sciences, 2019

This study was conducted to investigate the effect of using a mix of Lactobacillus (L.) plantarum... more This study was conducted to investigate the effect of using a mix of Lactobacillus (L.) plantarum, L. casei and Saccharomyces cerevisiae as silage inoculate to meadow grass on silage fermentation characteristics, silage quality and aerobic stability. A sample of Meadow grass (MG) was collected directly from the forage harvester during a first cut harvest. The fresh, chopped MG sample was divided into 2 equal portions and either treated with the test additive (EM) or received an equal volume of water (control). The dosage of EM Silage was based on 80 ml per ton product. Samples were analysed statistically as randomise complete (1 × 2) design using an ANOVA procedure of Genstat 15. Ensiled sample was found to have lower dry matter (DM), crude protein (CP), water soluble carbohydrate (WSC) and yeasts count, and higher mould count compared fresh samples. Additionally, treating MG with EM increased concentration of total volatile fatty acids (tVFA), acetic and propionic acids and total a...

Research paper thumbnail of Effect of Using Quercus Infectoria Galls in The Diet on Sheep Performance in Late Pregnancy And Early Lactation

The Journal of the University of Duhok

Research paper thumbnail of A Survey Study Of Sheep And Goats Raised Under Farm Conditions

Research paper thumbnail of Effect of supplemental tannin (chestnut) at feeding on rumen pH and protozoa number in vivo

Research paper thumbnail of Effect of Fattening Period on Growth Rate and Carcass Characteristics of Meriz and Local Black Goats a Thesis Submitted to the Council of the College of Agriculture University of Dohuk as a Partial

Supervised by Prof. Dr. Jalal E. Alkass _____________________________________________ January kan... more Supervised by Prof. Dr. Jalal E. Alkass _____________________________________________ January kanina dowe muharam 2009 2708 1430

Research paper thumbnail of Nutrition & Husbandry Effect of Fattening Period on Growth Rate and Carcass Charactristics of Meriz and Black Goats

This study was carried out at the Animal Farm, Animal Production Department, College of Agricultu... more This study was carried out at the Animal Farm, Animal Production Department, College of Agriculture, University of Duhok, where 10 Meriz goats averaged 13.65 kg weight and 3-4 months old and 10 Black goats averaged 30.3 kg weight and 6 months old were randomly divided into two groups and allocated to be fattened for either 90 or 150 days. Result revealed that the daily gain, feed efficiency, dressing percentage based on live body weight, rib eye area and fat thickness, lean, fat and bone percentage averaged 98.73gm, 5.12 kg/kg, 46.96%, 9.44cm 2 , 1.15 mm, 64.07%, 16.89 % and 19.02 % respectively for Meriz, while the corresponding values for Black goat were 75.58 gm, 6.43 kg/kg, 49.42 %, 12.47 cm 2 , 1.75 mm, 63.73 %, 16.82 % and 19.44 %, respectively. No significant differences between 90 and 150 days fattening period was observed in all studied traits except some commercial cuts.

Research paper thumbnail of Nutrition & Husbandry Effect of Fattening Period on Growth Rate and Carcass Charactristics of Meriz and Black Goats

This study was carried out at the Animal Farm, Animal Production Department, College of Agricultu... more This study was carried out at the Animal Farm, Animal Production Department, College of Agriculture, University of Duhok, where 10 Meriz goats averaged 13.65 kg weight and 3-4 months old and 10 Black goats averaged 30.3 kg weight and 6 months old were randomly divided into two groups and allocated to be fattened for either 90 or 150 days. Result revealed that the daily gain, feed efficiency, dressing percentage based on live body weight, rib eye area and fat thickness, lean, fat and bone percentage averaged 98.73gm, 5.12 kg/kg, 46.96%, 9.44cm 2 , 1.15 mm, 64.07%, 16.89 % and 19.02 % respectively for Meriz, while the corresponding values for Black goat were 75.58 gm, 6.43 kg/kg, 49.42 %, 12.47 cm 2 , 1.75 mm, 63.73 %, 16.82 % and 19.44 %, respectively. No significant differences between 90 and 150 days fattening period was observed in all studied traits except some commercial cuts.