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The nutritional value of roselle seed meal in laying hen diets
Author(s) -
Backeit Mohammed H,
El Zubeir El Fadil A,
Jubarah Salah K
Publication year - 1994
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740650212
Subject(s) - meal , yolk , feed conversion ratio , chemistry , food science , calcium , zoology , phosphorus , biology , body weight , organic chemistry , endocrinology
The effects of feeding mechanically extracted roselle seed meal (RSM) to laying hens at dietary levels up to 200 g kg −1 were studied over a 14‐week period. RSM contains 491.1 g crude protein, 59 g ether extract, 169.6 g crude fibre, 113.5 g ash, 6.8 g calcium, 6.6 g total phosphorus and 0.6 g magnesium kg −1 . From chemical analyses the metabolisable energy content of RSM would be expected to be 10.07 MJ kg −1 but a high value (11.63 MJ kg −1 ) was obtained for true metabolisable energy using chick growth assay. As the inclusion rate of RSM increased rate of lay, feed intake and egg weight were increased ( P < 0.01). The dietary treatments had no significant effects on feed conversion ratio, mortality, shell thickness, albumen height, and yolk colour.