Title
Requirement of the laying hen for apparent fecal digestible lysine
Author
Schutte, J.B.
Smink, W.
Centraal Instituut voor Voedingsonderzoek TNO
Publication year
1998
Abstract
A study was conducted to determine the requirement for lysine of a White Leghorn strain of hens with a body weight of approximately 1,600 g. Before starting the experiment, apparent fecal digestibility of amino acids of the basal diet was determined in an in vivo digestibility trial with six individually housed hens. The basal diet used was based on corn and soybean meal and contained 0.65% total and 0.49% apparent fecal digestible lysine. To the basal diet, seven graded dose levels (0.04, 0.08, 0.12, 0.16, 0.20, 0.24, and 0.28%) of lysine as L-Lysine-HCl were added. The experimental diets were fed for 12 wk, covering the early stage of laying from 24 to 36 wk of age. Each experimental diet was fed to 60 individually caged housed birds. The dietary lysine requirement was found to be higher for maximizing efficiency of feed utilization than for obtaining maximum egg mass yield. Based on the feed conversion efficiency and at an egg mass yield of 57 g/hen-d, the requirement for total lysine was estimated to be about 900 mg/hen-d. From the results of the digestibility trial, it was calculated that the estimated requirement for total lysine was equivalent to 720 mg apparent fecal digestible lysine per hen-day.
Subject
Nutrition
Egg mass
Feed efficiency
Laying hen
Lysine
Requirement
Lysine
Animal
Body weight
Chicken
Digestion
Feces
Female
Maize
Nutritional requirement
Physiology
Soybean
Animals
Body Weight
Chickens
Digestion
Feces
Female
Lysine
Nutritional Requirements
Soybeans
Zea mays
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TNO identifier
70525
ISSN
0032-5791
Source
Poultry Science, 77 (5), 697-701
Document type
article