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Optimising the efficiency of energy, calcium and phosphorus utilisation in layers fed on vegetable sources of protein. - LS0905

Objective
1. To monitor the pattern of feed intake throughout a 24 hour period in individually caged laying hens fed a mash containing two inclusion levels of calcium (optimum according to the published calcium requirements of laying hens and less than optimum). 2. To determine the total phosphorus, nitrogen and calcium balance of laying hens fed a mash containing different levels of dicalcium phosphate (optimum and less than optimum in terms of dietary calcium and available phosphorus levels) x two levels of phytase (with and without phytase) each determined with and without access to separate calcium (ad libitum or controlled). 3. To determine the effect of feeding four levels of dicalcium phosphate x two levels of phytase (with and without phytase) when provided with or without access to separate calcium of two particle sizes on feed usage, egg mass output, feed conversion efficiency, protein efficiency, mortality, egg shell strength, bone strength and feeding/husbandry techniques.
Project Documents
• Final Report : `Optimising the efficiency of energy, calcium and phosphorus utilisation in layers fed on vegetable sources of protein`   (83k)
Time-Scale and Cost
From: 1997

To: 2000

Cost: £95,466
Contractor / Funded Organisations
ADAS UK Ltd., University - Leeds
Keywords
              
Fields of Study
Livestock