The response of store lambs to protein supplementation of a roughage-based diet

Hassan, Shaker A.; Bryant, M. J.

doi:10.1017/s0003356100017748

Cited by 18 publications

(6 citation statements)

References 13 publications

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“…However, the general conclusion from these and other studies (e.g. Hassan and Bryant, 1986), is that values for the requirements of lambs for UDP quoted by ARC (1980) are too low, at least in some_circumstances. Clearly, where silage is the basal diet, supplementation with a protein source of low degradability in the rumen has marked performance benefits, particularly after a period of maintenance feeding.…”

Section: Tablementioning

confidence: 64%

“…However, Yilala and Bryant (1985) summarized data from several experiments and showed a clear effect of protein supplementation of silage (either fish meal or rapeseed meal) on DLWG compared with the predicted responses of lambs (Figure 1). They were unable to confirm whether this was as a result of increased microbial protein yield or the direct supply of amino acids, but subsequent studies (Hassan and Bryant, 1986) have confirmed the response to UDN.…”

Section: Tablementioning

confidence: 98%

“…FFEB gain was increased significantly by fish meal inclusion (P < 0-01). Hassan and Bryant (1986) also investigated the response of lambs to increasing levels of rumen undegradable nitrogen (UDN) from either fish meal or formaldehydetreated rapeseed meal. Daily live-weight gains (DLWG) were again improved by the inclusion of increasing amounts of UDN, especially in the first 3 weeks, but the effect was more pronounced with fish meal.…”

Section: Tablementioning

confidence: 99%

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Nutrition of the Finishing lamb

Webster¹,

Povey²

1990

BSAP Occas. Publ.

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I n order to achieve maximum economic returns, the finished-lamb producer needs to plan his production system to meet the requirements of his chosen market. These requirements are now becoming more specific as consumer demands for a quality product increase and new markets (e.g. Europe) become available. With the diversity of genetic and environmental backgrounds of lambs destined for slaughter, together with the seasonality of breeding in sheep, it is not surprising that a range of finishing systems exists. This paper highlights recent developments in the nutrition of the finishing lamb and examines their potential.In the early lambing flock, where fast growth rates are essential, lambs are often weaned when they are 4 to 6 weeks old. Similarly, in flocks lambing more than once per year, early weaning is necessary to allow the ewe to recover body condition before the next mating. Cereals are rich sources of energy and highly palatable to young lambs. Their rapid rate of fermentation in the rumen makes intensive finishing on cereal-based diets a relatively easy process, with growth rates of 350 to

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Section: Tablementioning

confidence: 64%

Section: Tablementioning

confidence: 98%

Section: Tablementioning

confidence: 99%

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Nutrition of the Finishing lamb

Webster¹,

Povey²

1990

BSAP Occas. Publ.

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“…These findings apply when the basal diet consisted of NaOH-treated straw (Hovell, 0rskov, Grubb and MacLeod, 1983;Hassan and Bryant, 1986), grass silage (Yilala and Bryant, 1985;Povey, Webster and Weekes, 1990) or maize silage (Kossaibati and Bryant, 1990). These findings apply when the basal diet consisted of NaOH-treated straw (Hovell, 0rskov, Grubb and MacLeod, 1983;Hassan and Bryant, 1986), grass silage (Yilala and Bryant, 1985;Povey, Webster and Weekes, 1990) or maize silage (Kossaibati and Bryant, 1990).…”

Section: Introductionmentioning

confidence: 89%

Effects of rapeseed-meal and fish-meal supplementation of maize silage-based diets upon voluntary intake, live-weight gain and wool growth of store lambs

Kossaibati

Bryant

1994

Anim. Sci.

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Link to this article: http://journals.cambridge.org/abstract_S0003356100007078How to cite this article: M. A. Kossaibati and M. J. Bryant (1994). Effects of rapeseed-meal and sh-meal supplementation of maize silage-based diets upon voluntary intake, live-weight gain and wool growth of store lambs. AbstractThirty-six individually penned lambs (mean live weight 32-4 (s.d. 2-27) kg) were offered maize silage ad libitum and one of three concentrate mixes, two of which contained extracted rapeseed meal (control and HR) and the other fish meal (FM). The concentrates were given according to live weight and in sufficient quantities to provide proportionately about 0-4 of the dry matter (DM) intake of the lambs. The dietary concentrations of nitrogen (N) g/kg DM were 22-4, 27-4 and 27-5 and of rumen undegradable N 6-6, 7-3 and 11-6 for the control, HR and FM diets respectively. Both the HR and FM diets depressed maize silage intakes compared with the control during the first 21 days (P < 0-05) and lambs given the FM diet continued to have lower intakes than control lambs (P < 0-05) throughout the experiment. The live-weight gain of HR lambs was considerably depressed in comparison with the control and FM lambs during the first 21 days of the experiment (P < 0-05). Overall HR lambs gained weight more slowly than control and FM lambs up to 45 kg live weight but the difference was not statistically significant. Food conversion ratio was better for FM than HR (P < 0-01). There were no treatment differences in wool growth. The results obtained provide little evidence that fish meal had any beneficial effects upon lamb growth compared with the control diet except a possible increase in the efficiency of metabolizable energy utilization.

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“…Dietary supplements of fish meal have frequently been shown to increase live-weight gain and nitrogen (N) balance as well as to reduce food conversion ratio in store lambs given roughagebased diets (Yilala and Bryant, 1985;Hassan and Bryant, 1986). Hovell and 0rskov (1989) have proposed that the potential for growth in lambs cannot be met by diets formulated to satisfy only the needs of the rumen microflora for N and that a dietary allowance of rumen undegradable protein (UDN) is required if the potential for lean tissue growth is to be achieved.…”

Section: Introductionmentioning

confidence: 99%

Effects of rapeseed-meal and fish-meal supplementation of maize silage-based diets upon the tissue growth and body composition of store lambs

Kossaibati

Bryant

1994

Anim. Sci.

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Link to this article: http://journals.cambridge.org/abstract_S000335610000708XHow to cite this article: M. A. Kossaibati and M. J. Bryant (1994). Effects of rapeseed-meal and sh-meal supplementation of maize silage-based diets upon the tissue growth and body composition of store lambs. AbstractThirty-six individually penned lambs (mean live weight 32-4 (s.d. 2-27) kg) were offered maize silage ad libitum and one of three concentrate mixes, two of which contained extracted rapeseed meal (control and HR) and the other fish meal (FM). The concentrates were given according to live weight and in sufficient quantities to provide proportionately about 0-4 of the dry matter (DM) intake of the lambs. The dietary concentrations of the nitrogen (N) g/kg DM were 22-4, 27-4 and 27-5 and of the rumen undegradable N 6-6, 7-3 and 11-6 for the control, HR and FM diets, respectively. All lambs were slaughtered at 45 kg live weight and chemical composition of the empty body and some of the component parts determined. A further 12 lambs were slaughtered at the beginning of the experiment to establish body composition before the dietary treatments were imposed. The HR lambs had lower fleece-free empty body (FFEB) gains than either control or FM lambs (P < 0-05). This reduced gain of HR lambs was particularly associated with a reduction in fat deposition (P < 0-01) such that the FFEBs contained less fat than control and FM lambs (P < 0-01). The efficiency of conversion of metabolizable energy for growth (k^) was worse than both the control (P < 0-01) and the FM (P < 0-001) diets. The FFEBs of HR lambs also contained more ash (P < 0-05) than the lambs receiving the other diets. The FM diet was associated with greater gains of fat and energy in the guts compared with the control diet (P < 0-05) and FM lambs had a better k,, value than control lambs (P < 0-05). There was no evidence that FM lambs had better N retention than lambs on the other two treatments.

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The response of store lambs to protein supplementation of a roughage-based diet

Cited by 18 publications

References 13 publications

Nutrition of the Finishing lamb

Nutrition of the Finishing lamb

Effects of rapeseed-meal and fish-meal supplementation of maize silage-based diets upon voluntary intake, live-weight gain and wool growth of store lambs

Effects of rapeseed-meal and fish-meal supplementation of maize silage-based diets upon the tissue growth and body composition of store lambs

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