Supplementation of the amino acid composition of protein-rich wheat with protein concentrates and L-lysine in rations for laying hens. 4. Effect of various rearing diets on crude protein, fat and ash contents of the utilizable and nonutilizable parts of carcasses of slaughter hens

Die Nahrung
K Gruhn, H Graf

Abstract

The present paper is concerned with the effects of four rations of varying composition (fed to pullets from the eighth to the twenty-second week of life) on the composition of the carcasses of laying hens at the end of a 52-week trial. Ration 1 served as a control; ration 2 contained 68% protein-rich wheat as a protein carrier, 2% extracted soybean meal. 4% fish meal; the two other rations contained only 94% protein-rich wheat with or without addition of 2% lysine. The mean live-weights of the animals for slaughter were: 1792 g +/- 71 g; 1760 g +/- 78 g; 1701 g +/- 92 g; and 1655 +/- 102 g, respectively. The mean portion of edible parts (heart, liver, stomach, fatty tissue, follicles, flesh) of the 104 carcasses was 61.6% +/- 3.0%. The edible parts contained (mean values): crude protein, 18.0% +/- 2.0%; raw fat, 22.8% +/- 5.7%; and crude ash, 1.02% +/- 0.16%. The values calculated for the bonefree, uneatable parts (to be used as feed) were: crude protein, 16.2% +/- 0.7%; raw fat, 8.7% +/- 1.5%; and crude ash, 3.45% +/- 0.32%. The ash content of the edible parts is increased by lysine-rich diets. The rearing as well as the feeding during the laying period exerted no targeted effect on the crude protein and raw fat contents of th...Continue Reading

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.