INCUBATION CONDITIONS AND JAPANESE QUAIL EGG CHARACTERISTICS AS INFLUENCED BY DIFFERENT LEVELS OF DIETARY CALCIUM | ||
| Egyptian Journal of Agricultural Research | ||
| Volume 71, Issue 2, June 1993, Pages 551-570 PDF (4.89 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1993.460101 | ||
| Authors | ||
| RAOF E. RIZK1; NABEH S. ISSHAK2; HASSAN S. ZEWEIL3 | ||
| 1Animal Production Research Institute, Agricultural Research Centre, Giza, Egypt. | ||
| 2Faculty of Agriculture, Kafr El-Sheikh, Tanta University, Egypt | ||
| 3Faculty of Agriculture, Alexandria University, Egypt | ||
| Abstract | ||
| Five groups of 120 Japanese quails were used to study dietary calcium (Ca) levels on slected egg parameters, eggshell thickness, eggshell porosity and egg weight loss during incubation. egg production, egg wight, feed consumption and feed efficiency were not significantly affected by Ca levels. Shell thickness, specific gravity , shape index, yolk and albumen heights were significantly affected . Loss of egg weight was significantly affected with increasing Ca level in the first three days of incubation than during other stages of incubation. No significant effect of dietary Ca on hatchability of fertile eggs was found. Pore numbers and shell thickness were significantly (P<0.05) affected in different eggshell regions for Late dead (LD) and hatched (H) eggshell types. Pore numbers decreased significantly with increasing Ca levels for the different eggshell types . Negative (p < 0.05) correlation between shell thickness and pore concentration was recorded in LD type allover the egg regions. Negative correlation (P r 0.05 ) was also recorded in H type among the equator and small end egg regions. | ||
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