An Improved Method to Estimate Heat Production by Growing Sheep

Holland C Dougherty; Mark Evered; Edward H Clayton; James W Oltjen; Hutton Oddy

Abstract

Livestock feeding systems calculate energy transactions as the sum of energy used for maintenance and growth/production, with associated efficiencies (k_m and k_g ) for the conversion of feed energy toward these purposes (Freer et al 2007, NASEM 2007). These efficiencies reflect the amount of heat (HP) produced from using metabolizable energy from feed (MEI) for maintenance and gain. This approach attributes variation in HP to variation in MEI and dietary energy density (M/D). However, in growing animals, HP also arises from changes in body composition (fat and protein) and composition of gain. A simple way has been devised to combine these two approaches to calculate total HP in growing sheep.

Original language	English
Pages	30-31
Publication status	Published - 31 Jul 2023
Event	RAAN 2023: Recent Advancement in Animal Nutrition Australia - Hilton, Gold Coast, Gold Coast, Australia Duration: 27 Jul 2023 → 28 Jul 2023

Other

Other	RAAN 2023: Recent Advancement in Animal Nutrition Australia
City	Gold Coast, Australia
Period	27/07/23 → 28/07/23

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title = "An Improved Method to Estimate Heat Production by Growing Sheep",

abstract = "Livestock feeding systems calculate energy transactions as the sum of energy used for maintenance and growth/production, with associated efficiencies (km and kg ) for the conversion of feed energy toward these purposes (Freer et al 2007, NASEM 2007). These efficiencies reflect the amount of heat (HP) produced from using metabolizable energy from feed (MEI) for maintenance and gain. This approach attributes variation in HP to variation in MEI and dietary energy density (M/D). However, in growing animals, HP also arises from changes in body composition (fat and protein) and composition of gain. A simple way has been devised to combine these two approaches to calculate total HP in growing sheep.",

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AB - Livestock feeding systems calculate energy transactions as the sum of energy used for maintenance and growth/production, with associated efficiencies (km and kg ) for the conversion of feed energy toward these purposes (Freer et al 2007, NASEM 2007). These efficiencies reflect the amount of heat (HP) produced from using metabolizable energy from feed (MEI) for maintenance and gain. This approach attributes variation in HP to variation in MEI and dietary energy density (M/D). However, in growing animals, HP also arises from changes in body composition (fat and protein) and composition of gain. A simple way has been devised to combine these two approaches to calculate total HP in growing sheep.

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