The Nitrogen Balance of Laying Pullets
نویسندگان
چکیده
منابع مشابه
Ammonia Emissions of Pullets and Laying Hens as Affected by Stocking Density and Manure Accumulation Time
Data on ammonia (NH3) emissions from pullets (hens <18 weeks of>age) are non-existent despite the large differences in nutritional and environmental conditions between raising pullets and laying hens. Different stocking densities (SDs) in housing the birds may be used according to certain industry guidelines on production; however, information concerning the impact of SD on properties of accumu...
متن کاملToxopathology of gout induced in laying pullets by sodium bicarbonate toxicity.
A total of 60, 3-week-old, laying pullets were used in the present experiment. The exposed birds received excess sodium bicarbonate (SB) in their drinking water for 35 days at the levels of: 2 g/l (0.2%), 7.5 g/l (0.75%), 20 g/l (2%) and 40 g/l (4%). All birds were subjected to pathological and toxicological examination. Birds of the 0.75% and 2%-groups developed gross picture of visceral gout,...
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Light plays a key role in the development, production performance, health, and well-being of poultry. Yet there are no standards regarding light type, spectrum, intensity and diurnal photoperiod for poultry production. Thus, it is of socio-economic as well as scientific values to assess light needs of pullets and laying hens, especially considering the emergence of LED lights intended for poult...
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An increased excretion of nitrogen after injuries in experimental animals and in man was described by Cuthbertson (1930). In a series of papers he and his colleagues discussed and explored almost all the facets of this phenomenon which have since been studied (see, e.g., Cuthbertson, 1929, 1930, 1936, 1942; Cuthbertson & Tompsett, 1935 ; Cuthbertson, McGirr & Robertson, 1939). He investigated t...
متن کاملThe ability of laying pullets to negotiate two ramp designs as measured by bird preference and behaviour
Background Laying hens are often kept in barn or free-range systems where they must negotiate level changes in the house to access resources. However, collisions and resultant keel fractures are commonplace. Producers sometimes add ramps to make raised areas more accessible but designs vary and very little research has investigated bird preference or behaviour when using different ramp designs,...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1937
ISSN: 0032-5791
DOI: 10.3382/ps.0160247