Reproductive performance of layer chickens reared on deep litter system with or without access to grass or legume pasture
| Autor: | Okanlawon Onagbesan, A. O. Ladokun, O.E. Oke |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Ovary Poaceae Pasture 03 medical and health sciences Animal science Food Animals Floors and Floorcoverings Botany medicine Animals Legume geography geography.geographical_feature_category biology Reproduction 0402 animal and dairy science Deep litter Fabaceae 04 agricultural and veterinary sciences biology.organism_classification Housing Animal 040201 dairy & animal science 030104 developmental biology medicine.anatomical_structure Stylosanthes Oviduct Female Animal Science and Zoology Chickens |
| Zdroj: | Journal of Animal Physiology and Animal Nutrition. 100:229-235 |
| ISSN: | 0931-2439 |
| DOI: | 10.1111/jpn.12353 |
| Popis: | Summary Despite several studies carried out to investigate the effects of access to pasture on poultry performance, there is a dearth of information on the comparative benefit of grass and legumes. This study investigated the effects of rearing systems [deep litter system (DL), deep litter with access to legumes (LP) or grass (GP) pastures] on the performance of ISA Brown layers. Two hundred and forty 12-week-old pullets were housed for this study. They were reared until 60 weeks of age. Eighty birds were assigned to each treatment; each treatment had four replicates of 20 birds each. Two birds per replicate were slaughtered at weeks 20, 35 and 58 for determination of the weights of liver, ovary, oviduct and the number of follicles. Daily egg production records were kept from the day of first egg to 42 weeks in lay. Body weights were recorded weekly. Results indicated that at 20 weeks of age, the hens kept in the LP had higher (p |
| Databáze: | OpenAIRE |
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