Spelling suggestions: "subject:"poultry -- breeding"" "subject:"poultry -- reeding""
31 |
DNA fingerprinting : a tool for determining genetic variability and strain relationships in poultryDawe, Yvonne M. January 1988 (has links)
No description available.
|
32 |
The influence of the rose and pea comb genes on reproductive performance in the male fowl.Buckland, Roger Basil January 1965 (has links)
No description available.
|
33 |
Breeding for aggressiveness in the fowlEaton, Richard Channon. January 1949 (has links)
Call number: LD2668 .T4 1949 E15 / Master of Science
|
34 |
The effect of diluent, storage time, temperature and dilution ratio on fertility of semen from two breeds of fowl.Lopez Lorenzo, Ricardo. January 1978 (has links)
No description available.
|
35 |
Comparison on the effectiveness of different chemical treatments of built-up broiler litter on broiler house environment and broiler performanceUddin, Zaheer 14 March 1991 (has links)
The objectives in these four experiments were to observe
the effectiveness of sodium bisulfate and clinoptilolite and
different methods of application of sodium bisulfate, ferrous
sulfate heptahydrate and Micro Aide® on atmospheric ammonia
level in the broiler house and on broiler performance.
The first experiment was conducted to determine the
optimum effective level of the litter application of sodium
bisulfate. Atmospheric ammonia at 4 weeks and litter moisture
at 3 weeks
treated-pens
were significantly lower in sodium bisulfate
(488 g/m²) than in the untreated control pens.
However, broiler performance was not significantly affected
with any treatment. Litter application of sodium bisulfate at
244 g/m² and 488 g/m² were comparable and better than the 122
g/m² and untreated control.
In Experiments 2 and 3 comparisons of litter chemical
treatments of liquid Micro Aid® (8.75 ml/L H₂O) applied at 0,
2, 4,and 6 weeks; granular Micro Aid® (0.5 mg/g of feed) fed
continuously throughout the experiment, and litter application
of ferrous sulfate (732 g/m²); clinoptilolite (2443 g/m²),
sodium bisulfate (244 g/m²) and ferrous sulfate (732 g/m²) were
made for 7 week periods. Ferrous sulfate-treated pens (732
g/m²) had significantly lower litter pH at 2, 4 and 6 weeks
than untreated control and significantly lower atmospheric
ammonia levels at 3 and 6 weeks than the clinoptilolite (2443
g/m²), sodium bisulfate (244 g/m²) and untreated control in the
other experiment.
In the fourth experiment, sodium bisulfate was applied
twice (244 g/m²/application) at 0 and 4 weeks, sodium
bisulfate applied once (488 g/m²) and ferrous sulfate applied
once (732 g/m²) prior to the experiment. At 4 weeks mean body
weights and feed conversion were significantly better with one
sodium bisulfate application than the untreated control. At
7 weeks feed conversion (P<0.08) and male body weights (P<0.1)
were slightly better in one sodium bisulfate application than
in the untreated control while mortality was significantly
lower in the untreated control pens. Most mortality occurred
after 4 weeks and were due primarily to Sudden Death Syndrome.
Atmospheric ammonia levels at 0, 1, 2, 3 and 4, weeks and
litter pH levels at 0, 1, 2, 3, and 4 weeks were significantly
lower in pens with one application of sodium bisulfate than in
pens untreated. Litter application of sodium bisulfate once
(488 g/m²) seemed to be the best litter treatment in reducing
atmospheric ammonia. / Graduation date: 1991
|
36 |
Social behavior of chickens as influenced by three loci determining morphological traits.Sefton, Arnold Edward. January 1969 (has links)
No description available.
|
37 |
The influence of comb type on growth rate in the domestic fowlCrober, Donald Curtiss. January 1964 (has links)
During the early existence of the science of genetics, the area of single gene effects was the more active area of interest. Throughout the initial development of this science, studies of qualitative traits provided the basis on which the later principles were founded. [...]
|
38 |
The effect of diluent, storage time, temperature and dilution ratio on fertility of semen from two breeds of fowl.Lopez Lorenzo, Ricardo. January 1978 (has links)
No description available.
|
39 |
The efficiency of tropical relevant major genes in a dual purpose layer strain in the subtropical coastal region of South-East AfricaGarces, Alice P.J.T. 13 July 2006 (has links)
Biological and economic efficiencies of major genes for feather reduction (naked neck and frizzle) and body size reduction (dwarf) in a dual purpose layer strain were evaluated in the subtropical coastal region of South-East Africa (Maputo, Mozambique). The experimental material consisted of eight different genetic groups, two diets (14.4 and 16.2% crude protein) and two climatic seasons. Birds were caged individually in an open-side shelter with natural light. Traits measured were: temperature and relative humidity, body weight, age at first egg, egg weight, egg production, egg quality, feed intake and mortality. The following were calculated: temperature-humidity index (THI), growth rate, persistence, egg mass, feed efficiency, feed conversion, biological efficiency (EM/BWO.75) and productivity (EN/BWo. 75). The main results show that: (1) none of the feather-reduced genes significantly improved egg production or the efficiency of feed utilization, although the naked neck (Na) excelled in terms of the number and mass of eggs produced per metabolic body weight; (2) the dwarf gene (dw) was associated with delayed sexual maturity, production of fewer and lighter eggs, higher persistence, better feed conversion and higher survivability; (3) climatic seasonal effects were observed in all traits analysed, with elevated temperatures restraining body weight gain, the number and weight of the eggs produced, and voluntary feed intake; (4) the lower dietary protein content resulted in decreased egg weight. It was concluded that the normal feathered dwarf is the most suitable genetic group for peri-urban and rural production systems in this region. / Thesis (PhD (Animal Science))--University of Pretoria, 2007. / Animal and Wildlife Sciences / unrestricted
|
40 |
Social behavior of chickens as influenced by three loci determining morphological traits.Sefton, Arnold Edward. January 1969 (has links)
No description available.
|
Page generated in 0.2761 seconds