Light and Egg Production

Egg production functions

Effect of Monochromatic Light on Production and Egg Quality in Laying Japanese

s of papers 97 eggshell breaking strength, and eggshell percentage were no affected by treatments(P>0.05). Only eggshell thickness was affected by treatments (P<0.05), and RL showed the highest value( 0.1862 mm), followed by BL (0.1785mm).

Effects of light intensity from photostimulation in four strains of commercial egg layers: 2. Egg production parameters.

The effects of light intensity (LI) from photostimulation to 45 wk of age on egg production parameters and egg size characteristics were examined in four layer strains. Floor housed pullets were raised in a light-tight facility from 1 d of age until housing in individually illuminated cages at 17 wk of age. At 17 wk of age, two white egg strains, ISA-White (ISA-W) and Shaver 2000 (S2000), and t...

Egg Production Traits and Egg Quality Characteristics in Black and Brown Plumage Color Lines of Japanese Quail

The present study was conducted to determine egg production traits and egg quality characteristics in black and brown lines of Japanese quail. A total of 500 quails comprising 400 females and 100 males obtained from two breeding centers were raised according to the standard procedure for Japanese quail. They were grouped in according to their plumage colours. Age at first egg-laying has been re...

Effect of Dietary Betaine and Folic Acid Supplementation on Performance, Egg Folate Content and Egg Production of Japanese Quail

A study was conducted to investigate the effects of different betaine (BET) (0.0, 0.5 or 1.0 g/kg) and folic acid (FA) (0.0, 4.0 or 8.0 mg/kg) levels on performance, egg FA concentration and egg production of laying quails using 288 forty-two day-old Japanese quail in a 3 × 3 factorial arrangement of treatment based on randomized complete design. The results showed that none of the performance ...