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Registros recuperados: 12
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Seedling growth response of Seriphidium quettense to water stress and non-water stress conditions Phyton
Ahmad,S; Gul,S; Achakzai,AKK; Islam,M.
Seedling growth and development of Seriphidium quettense were examined under water stress (WS) and non-water stress (NWS) conditions. Seedlings were grown in pots to investigate their response to NWS conditions. Impact of WS on seedling growth was assessed in pre-existing plants grown under a semi-arid, natural environment. Seedling growth attributes were recorded on a monthly basis. Seedling growth exhibited a significant positive response under NWS conditions. Length of the main root axis at the first leaf emergence stage was 5.69 cm under NWS conditions; however, it was 4.8 cm in the natural environment (WS). At the end of the growing season, length of their primary root was 118 cm in NWS conditions. At the same time, it reached 8.8 cm in the WS natural...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Seriphidium quettense; Root and shoot growth; Water stress.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000100004
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Effect of feeding whole linseed as a source of polyunsaturated fatty acids on performance and egg characteristics of laying hens kept at high ambient temperature Rev. Bras. Ciênc. Avic.
Ahmad,S; Ahsan-ul-Haq,; Yousaf,M; Kamran,Z; Ata-ur-Rehman,; Sohail,MU; Shahid-ur-Rahman,.
The present study was conducted to evaluate the effects of feeding whole linseed on the laying performance and egg characteristics in laying hens kept at high ambient environmental temperatures (average 34 ºC; the diurnal temperature range 26 ºC to 41 ºC). Two hundred and forty 38-wk-old white Leghorn laying hens were fed diets containing 0, 5, 10 or 15% whole linseed (as a source of n-3 polyunsaturated fatty acids) for a period of 12 weeks. Egg production was recorded daily, while feed intake and egg characteristics were monitored on weekly basis. The results of the study demonstrated that egg production and feed intake decreased, while feed conversion ratio (FCR) per dozen of eggs increased (p < 0.05) with increasing dietary linseed levels. Egg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Linseed; N-3 PUFA; Laying hens; Hot climate; Performance.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000100004
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Effect of prescribed fre on forage production and nutritive value of the perennial grass Saccharum griffithii Phyton
Gul,B; Islam,M; Ahmad,S; Gul,S.
The effect of fre on growth and nutritive value of Saccharum griffithii Munro ex Boiss-ravennae (Linn.) Murr. hybrid, a low palatable perennial grass in the semi-arid region of the highlands of Balochistan, Pakistan, was evaluated during 2008 and 2009. Prescribed fire treatments were applied in February 2008 and 2009 at the dormant stage of vegetation. Different growth parameters (tiller height, tiller number/plant), forage production (fresh, dry) and nutritive value (crude protein, ash) were compared with control (unburnt) plots. Fire increased the number of tillers, and the fresh and dry forage production in both years. Fire also improved the crude protein contents. Prescribed fire at the dormant stage of vegetation can be used as a vegetation tool to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tiller growth; Fire; Biomass.
Ano: 2014 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200025
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Aboveground biomass and concentration of nutrients in semiarid rangeland plant species: Influence of grazing and soil moisture Phyton
Gul,B; Islam,M; Ahmad,S; Gul,S.
Spatial and temporal patterns of aboveground biomass and nutritive value of rangeland species with respect to the influence of grazing and soil moisture were investigated. The research was conducted during two years at the Tomagh Research Station, near Sanjawi, Ziarat District, Balochistan, Pakistan. This area is protected from grazing since 1998; however, some of the area is open for grazing. Tree sites were selected for research purposes: a protected plain, a protected hilly, and an unprotected plain grazed area. Sampling was carried out during the spring, summer and autumn seasons. Results revealed that soil moisture was greater at the protected than unprotected sites. The aboveground plant biomass was 66% to 76% lower at unprotected than protected...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rangeland; Biomass production; Season; Semiarid; Grazing; Grass.
Ano: 2016 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100013
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Different Selection Strategies for the Improvement of the Growth Performance and Carcass Traits of Japanese Quails Rev. Bras. Ciênc. Avic.
Ahmad,S; Mehmood,S; Javed,K; Mahmud,A; Usman,M; Rehman,A; Ishaq,HM; Hussain,J; Ghayas,A.
ABSTRACT The present study evaluated different selection strategies to improve the growth performance and carcass traits of Japanese quails. To this end, 540 Japanese quails previously selected for high body weight at three ages (10, 12 and 14 weeks) from four close-bred flocks (Major, Kaleem, Saadat and Zahid) were subjected to three selection strategies: pedigree-based, mass selection or random-bred (controls). For pedigree-based selection, 108 birds (4 close-bred flocks × 3 age groups × 9 replicates × 1 bird each) with full pedigree and selected for high body weight were used, whereas in mass selection 324 birds (4 close-bred flocks × 3 age groups × 9 replicates × 3 birds each) with high body weight were selected to be the parents of next generation....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pedigree Selection; Mass Selection; Parental Age groups; Close-bred Flocks; Feed Conversion Ratio; Carcass yield.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300497
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Subsequent Effect of Lysine Regimens on Egg Characteristics of Native Aseel Chicken Rev. Bras. Ciênc. Avic.
Batool,T; Farooq,S; Roohi,N; Mahmud,A; Ghayas,A; Ahmad,S; Usman,M.
ABSTRACT This study was planned to evaluate subsequent effects of rearing under various lysine regimens on egg quality traits in Peshawari, Mushki, Mianwali and Lakha varieties of native Aseel. Ninety six pullets and 12 cockerels (24♀ and 3♂) from each variety were randomly chosen, placed in three-tiered cage units of equal space and standard conditions were followed for their maintenance. These birds were reared on three lysine regimens (L1, L2 and L3), wherein L1 containing 1.3% lysine was given in one phase from week 1-6 of age, L2 regimens entailing 1.4 and 1.2% lysine was smeared in two phases from week 1-3 and 4-6 of age, while in L3 regimen, lysine @ 1.5, 1.3 and 1.1% in diet was fed in three phases from week 1-2, 3-4 and 5-6 of age, respectively....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aseel; Egg quality; Lysine regimens.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400789
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Influence of Moringa Oleifera Leaf Meal Used as Phytogenic Feed Additive on the Serum Metabolites and Egg Bioactive Compounds in Commercial Layers Rev. Bras. Ciênc. Avic.
Ahmad,S; Khalique,A; Pasha,TN; Mehmood,S; Ahmad,S Sohail; Khan,AM; Hussain,K.
ABSTRACT Phytogenic feed additives have been increasingly used in the last decade, and several plants and their metabolites have been investigated for the said purpose. In this context, present study aimed at evaluating the effects of Moringa oleifera as feed additive on layer performance, and egg bioactive compound levels and nutrient profile. HyLine W36 layers (n=200), 50 weeks of age, were randomly distributed in four treatments with five replicates of ten birds each. Four isocaloric (2725 kcal/kg) and isonitrogenous (CP 16%) diets were formulated and supplemented with 0, 0.5, 1.0, or 1.5% (w/w) of dried Moringa oleifera leaf powder (MLM). The results showed positive effects of MLM on egg production, egg mass, and feed conversion ratio, but negative...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Β-carotene; Moringa leaf; Quercetin; Production performance; Serum biochemistry.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000200325
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Productive Performance, Egg Characteristics and Hatching Traits of Three Chicken Genotypes under Free-Range, Semi-Intensive, and Intensive Housing Systems Rev. Bras. Ciênc. Avic.
Ahmad,S; Mahmud,A; Hussain,J; Javed,K.
ABSTRACT The present study aimed at evaluating the effect of housing system on the live performance, egg quality, and hatching traits of three dual-purpose chicken genotypes. In total, 180 birds, comprising 48 pullets and 12 cockerels from each of three genotypes, were evaluated during the production phase (27-46 weeks). For this, 144 pullets and 36 cockerels were randomly picked from 18 treatment block groups were shifted to breeding coops, allotting 4 pullets to one cockerel. A completely randomized complete block design (RCBD) was employed. Three genotypes, purebred Naked Neck (NN) and two crosses Rhode Island Red × Naked Neck (RIR × NN = RNN) and Black Australorp × Naked Neck (BAL × NN = BNN), were compared. Intensive system (p<0.0001) and BNN hens...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crossbred chickens; Egg quality; Hatching traits; Housing system; Live performance.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200341
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Effect of Breeder Age on the Progeny Performance of Three Naked-Neck Chicken Phenotypes Rev. Bras. Ciênc. Avic.
Azhar,M; Mahmud,A; Usman,M; Javed,K; Ishaq,HM; Mehmood,S; Ahmad,S; Hussain,J; Ghayas,A; Abbas,M.
ABSTRACT The study was planned to evaluate the effect of different naked-neck (NN) chicken genotypes and breeder ages on the growth performance of their progenies. A total of 126 chicks, from two breeder ages and three NN varieties, were reared up to 20 weeks of age. A randomized complete block design in factorial arrangement, with six treatments of seven replicates of two females and one male each, was applied. Treatments consisted of three NN varieties (light brown, black, and dark brown) and two breeder age groups (45 and 55 weeks old). Growth performance (body weight gain, feed intake and feed conversion ratio) were evaluated. Higher feed intake was observed in both the male and female progenies of 55-week-old compared with 45-week-old breeders. Light...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Breeder age; Naked-neck chickens; Progeny growth performance; Varieties..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000300312
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Effects of Different Anti-Stressors on Growth, Serum Chemistry and Meat Quality Attributes of Japanese Quail Rev. Bras. Ciênc. Avic.
Rasul,M; Mehmood,S; Ahmad,S; Javid,A; Mahmud,A; Rehman,A; Usman,M; Hussain,J; Ahmad,M; Azhar,M.
ABSTRACT The aim of the present study was to evaluate the effect of different anti-stressors on growth performance, carcass traits, bloodchemistry and meat quality attributes of broiler Japanese quail. For this purpose, a total of 1,875 quail chicks were procured and arranged according to completely randomized design, birds were divided into 5 treatment groups having 5 replicates of 75 birds each. The treatments consisted of four anti-stressors i.e., synthetic anti-stressors (Vitamin C and Betaine) and natural anti-stressors (Turmeric and Chia Seed) along with a control group. Bird’s diets were supplemented with vitamin C, betaine, turmeric and chia seed @ 600 mg/kg, 700 mg /kg, 300 mg/kg and 7,000 mg/kg, respectively. After four weeks, 10 birds per...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Japanese quail; Anti-stressors; Growth performance; Carcass traits; Serum chemistry.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100307
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Morphometric Traits, Serum Chemistry and Antibody Response of Three Chicken Genotypes under Free-Range, Semi-Intensive and Intensive Housing Systems Rev. Bras. Ciênc. Avic.
Ahmad,S; Mahmud,A; Hussain,J; Javed,K.
ABSTRACT The present study evaluated the effect of housing system on the morphometrics, serum chemistry and antibody response of dual-purpose chicken genotypes. A total of 156 pullets and 39 cockerels were randomly picked from 18 treatment block groups (3 housing system × 3 genotypes × 2 sexes) according to Randomized Complete Block Design (RCBD). Three genotypes, purebred Naked Neck (NN) and two crossbred Rhode Island Red × Naked Neck (RIR × NN = RNN) and Black Australorp × Naked Neck (BAL × NN = BNN), were compared. Morphometric traits were recorded during rearing period, thereafter, serum chemistry and antibody response were evaluated in pullets. Intensive and semi-intensive chickens were heavier (males, p=0.0012; females, p<0.0001) on week 21. Body...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antibody response; Chicken genotypes; Housing system; Morphometrics; Serum chemistry.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100327
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Comparative Study on Carcass Traits, Meat Quality and Taste in Broiler, Broiler Breeder and Aseel Chickens Rev. Bras. Ciênc. Avic.
Khan,U; Hussain,J; Mahmud,A; Khalique,A; Mehmood,S; Badar,IH; Usman,M; Jaspal,MH; Ahmad,S.
ABSTRACT Present study evaluated carcass and meat quality attributes of broilers, broiler breeders and Aseel chickens. Sixty birds from each chicken genotype (broiler, broiler breeder and Aseel chickens; five-wk-old broilers and 60-wk-old Aseel chickens and broiler breeders) were evaluated. Birds were maintained under similar environment for 21 days, and then slaughtered to analyze their carcass qualitative and organoleptic characteristics. No carcass yield differences were detected among genotypes. Aseel chickens had heavier neck, followed by broiler breeder and broiler (p<0.0001). Higher liver (p<0.0001), intestine (p<0.0001), ribs and back (p=0.0014) yields were obtained in broilers than in broiler breeders and Aseel chickens. Females showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aseel; Breeder; Broiler; Carcass traits; Meat quality.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100316
Registros recuperados: 12
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