Response of Early Weaned Pigs to Diets of Different Digestible Energy Concentrations and the Effects of Cereal Source and Added Molasses on Performance

O’Grady, J. F.; Bowland, J. P.

doi:10.4141/cjas72-010

Cited by 11 publications

(3 citation statements)

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“…INTRODUCTION ALTHOUGH dietary energy concentration is known to influence the performance and carcass characteristics of early-weaned pigs (O'Grady and Bowland, 1972;Campbell, Taverner and Mullaney, 1975;O'Grady, 1978) there is little definitive information on the effects of energy intake per se on performance or body composition.…”

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The influence of dietary protein and energy intake on the performance, body composition and energy utilization of pigs growing from 7 to 19 kg

Campbell

Dunkin

1983

Anim. Sci.

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Thirty-six entire male pigs were used to investigate the effects of two levels of dietary crude protein (150 and 220 g/kg) each in combination with four levels of feeding (1-0, 1-32, 1-64 MJ digestible energy/ kg M 073 per day and ad libitum) on growth, body composition and energy utilization over the live-weight range 7 to 19 kg.Growth rate responded linearly (P < 0-001) to increasing energy intake but was depressed (P < 005) when dietary crude protein was reduced from 220 to 150 g/kg.Raising digestible energy intake increased and decreased respectively the proportions of fat and protein in the empty body at 19 kg live weight. However, the magnitude of the response of both components to change in digestible energy intake was reduced in the case of pigs fed the lower protein diet.Total energy retained and that retained as fat and as protein responded linearly (P < 0-001) to change in digestible energy intake of either diet. Extrapolation of the regression of total energy retained on digestible energy intake yielded a digestible energy requirement for maintenance of 510 kj/kg M°" per day, which was unaffected by level of dietary protein.The partial efficiencies of protein utilization, estimated from the regressions of protein deposition (g/day) on protein intake (g/day), were 0-616 and 0-411 for pigs given the diets containing 150 and 220 g crude protein per kg respectively. 185

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The influence of dietary protein and energy intake on the performance, body composition and energy utilization of pigs growing from 7 to 19 kg

Campbell

Dunkin

1983

Anim. Sci.

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“…It has been established that pig performance in terms of rate and efficiency of gain, and quality of the carcass, is closely related to the intake of particular nutrients, especially protein and energy (Cooke, Lodge and Lewis, 1972;O'Grady and Bowland, 1972;Fetuga et al, 1975a and b). This study clearly demonstrated that methionine deficiency in the diet of pigs will cause an 'amino acid imbalance' and depression of daily feed consumption, hence a decreased intake of essential nutrients with consequent adverse effects on daily live-weight gain, efficiency of food conversion and quality of the carcass.…”

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Methionine requirements of weanling European pigs given cassava flour/soya bean meal diets

Balogun

Fetuga

1981

Anim. Sci.

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Forty-eight Large White x Landrace weanling pigs weighing initially 9-69 (s.e. 013) kg were used to evaluate the dietary methionine requirements of weanling European pigs reared under a humid, lowland, tropical environment. Response criteria used were growth rate, efficiency of food conversion, carcass quality, and the weights of some organs and individual muscles. The pigs (three male castrates and three females per treatment) were given a cassava flour-soya bean meal diet containing 202 g crude protein per kg dry matter and supplemented with increments of multiples of 0-8 g DL-methionine per kg diet. Total dietary methionine levels ranged from 2-3 to 7-9 g per kg diet dry matter. All diets contained 14-75 MJ digestible energy per kg dry matter. The experiment lasted 42 days, at the end of which the pigs were slaughtered at an average live weight of 17 kg.Growth rate and feed efficiency were significantly improved when the basal diet was supplemented with DLmethionine (P< 0-001). No significant treatment differences in organ weight were found. Methionine requirement was significantly influenced by sex and age of the pigs, with castrates having lower requirements than females. Pooled estimated methionine requirements for optimum growth rate and efficiency of food conversion were 40 and 4-3 g/kg diet dry matter respectively. Maximum proportion of lean was recorded on the diet containing 3-1 g total methionine per kg dry matter.

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“…Reports on the ability of the weanling pig to adjust its feed intake when challenged with diets containing energy levels well below 3400 kcal ME/kg are inconclusive. 0' Grady and Bowland (1972) On an as fed basis, all diets were calculated to contain 20.2% crude protein while the ME content of diets 1, 2, 3 and 4 were 3473, 3279, 3085 and 2890 kcal/kg, respectively ).…”

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Efficiency of metabolizable energy utilization for maintenance and growth by the weanling pig

McNutt

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Response of Early Weaned Pigs to Diets of Different Digestible Energy Concentrations and the Effects of Cereal Source and Added Molasses on Performance

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Cited by 11 publications

References 2 publications

The influence of dietary protein and energy intake on the performance, body composition and energy utilization of pigs growing from 7 to 19 kg

The influence of dietary protein and energy intake on the performance, body composition and energy utilization of pigs growing from 7 to 19 kg

Methionine requirements of weanling European pigs given cassava flour/soya bean meal diets

Efficiency of metabolizable energy utilization for maintenance and growth by the weanling pig

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