A comparison of diploid and tetraploid perennial ryegrass and tetraploid ryegrass/white clover swards under continuous sheep stocking at controlled sward heights. 2. Animal production

Vipond, J. E.; Swift, Gabriel; McClelland, T. H.; Fitzsimons, John; Milne, J. A.; Hunter, E. A.

doi:10.1111/j.1365-2494.1993.tb01862.x

Cited by 17 publications

(18 citation statements)

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“…The growth rates seen in the present experiment are similar to those seen in other grazing trials where Corriedale Iambs grazed ryegrass (Montossie et al, 2001) and Suffolk cross lambs out of Mule dams grazed clover-based swards (Vipond et al, 1993). The breeds differed in their growth responses to the different swards.…”

Section: Although Interactions Between Genotype Andsupporting

confidence: 77%

Growth and carcass composition of lambs of two breeds and their cross grazing ryegrass and clover swards

2004

Anim. Sci.

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Section: Although Interactions Between Genotype Andsupporting

confidence: 77%

Growth and carcass composition of lambs of two breeds and their cross grazing ryegrass and clover swards

2004

Anim. Sci.

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“…A high clover content of swards (proportionately 0-2 of dry matter) has been shown necessary to sustain output similar to that achieved by typical grass-N systems (Vipond, Swift, McClelland, FitzSimons, Milne and Hunter, 1993). A high clover content of swards (proportionately 0-2 of dry matter) has been shown necessary to sustain output similar to that achieved by typical grass-N systems (Vipond, Swift, McClelland, FitzSimons, Milne and Hunter, 1993).…”

Section: Introductionmentioning

confidence: 84%

Effects of clover and milk in the diet of grazed lambs on meat quality

1995

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Link to this article: http://journals.cambridge.org/abstract_S1357729800008390How to cite this article: J. E. Vipond, S. Marie and E. A. Hunter (1995). Effects of clover and milk in the diet of grazed lambs on meat quality. AbstractThe eating quality of lambs slaughtered at weaning or 8 to 9 weeks later off pastures of diploid grass (D), tetraploid grass (T) and tetraploid grass/white clover (TC) was studied. Samples of lean from grilled chops and roasted leg joints were assessed by members of a group of 36 sensory panellists for texture by rating juiciness and tenderness on an eight-point scale. Lamb and abnormal flavour were assessed in lean and fat samples. Lean from lambs slaughtered off the mother at weaning was significantly more tender than from lambs slaughtered 8 to 9 weeks later (5-8 v. 5-0, s.e.d. 0-18; P < 0-001). There was a tendency for lambs slaughtered offTC to be more juicy and tender. Lean from chops was significantly more juicy and tender and of superior flavour to lean from leg and overall acceptability was higher for chops. Acceptability of lamb slaughtered at weaning was higher than of lamb slaughtered 8 to 9 weeks later (5-3 v. 4-9, s.e.d. 0-14; P < 0-001). In further studies a trained sensory panel of 12 judges formed a consensus flavour profile for 10 attributes of lean and five attributes of fat. Univariate analysis revealed only small differences between treatments. Multivariate statistical procedures however identified significant treatment effects that appeared favourable to the flavour of lamb slaughtered off the mother although only around a third of the variation was explained. Analysis of weight loss on cooking showed less wastage when lambs were slaughtered off the mother (0-209 v. 0-225, s.e.d. 0-0043; P < 0-001) and when grazed on grass/clover (TC) v. grass (D, T) (0-206 v. 0-222, 0-223; s.e.d. 0-0053; P < 0-01). Weight loss on cooking was negatively correlated with texture and overall acceptability. The results obtained provide evidence for enhanced eating quality from production systems involving the sale of lambs off the mother. Incorporation of grazing of clover pastures into production systems showed some small benefits.

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“…For details on the establishment of these pastures and their relative lamb production over the first three grazing seasons see Swift, Vipond, McClelland, FitzSimons, Milne and Hunter (1993) and Vipond, Swift, McClelland, FitzSimons, Milne and Hunter (1993). In the previous 3 years, 1988-90 clover content of GC swards averaged 0-2 of herbage dry matter.…”

Section: Pastures and Sward Measurementsmentioning

confidence: 99%

Effects of clover in the diet of grazed lambs on production and carcass composition

Vipond¹,

Swift²,

Noble³

et al. 1993

Anim. Sci.

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The effect of grazing clover on ewes and lambs was studied using nitrogen-fertilized grass (G) and grass/white clover pastures (GC) containing proportionately 0-18 clover. Carcasses of lambs grazed on GC were significantly heavier than carcasses of lambs grazed on G pastures. An interaction with weaning occurred. Carcasses from lambs grazed on GC for 53 days post weaning were 2-3 kg heavier (F < 0-01) but lambs slaughtered at weaning had similar carcass weights. Diet had no effect on relative joint components of carcasses. The effect of clover in the diet on carcass weight was attributed to higher levels of protein retention. Analysis of the fatty acid composition of intramuscular and subcutaneous and perirenal lipids indicated small but significant effects of diet. Lean tissue lipids of lambs grazing clover showed significant increases in C18:2 and reduced C20 : 5 fatty acids. In tissue fats there were small increases in C14 : 0, C16 : 0 and C18 : 2 with reduced C18:1 content. Twin suckled lambs grazing GC for 94 days from turn-out in early April showed increased live-weight gain over lambs on G of 336 v. 287 glday (s.e.d. 84; P < 0-001). Post weaning live-weight gain of lambs was 173 and 221 g/day on G and GC respectively. Sward height was maintained at 5-18 and 5-24 (s.e.d. 0-075) cm on G and GC paddocks by adjusting ewe numbers. GC pastures carried proportionately 0-82 of the stock on G pastures but output of lamb was similar at 1289 and 1247 kg/ha for G and GC respectively. Results shoioed that the production penalty of lower stocking rate associated with grass/clover v. grass fertilized with 190 kg nitrogen per ha was ameliorated by higher lamb live-weight gain and carcass weight without change in joint composition or nutritionally significant change in fatty acid composition of carcass tissues.

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A comparison of diploid and tetraploid perennial ryegrass and tetraploid ryegrass/white clover swards under continuous sheep stocking at controlled sward heights. 2. Animal production

Abstract: A comparison of diploid and tetraploid perennial ryegrass and tetraploid ryegrass/white clover swards under continuous sheep stocking at controlled sward heights. 2. AbstractPerformance of continuously stocked Mule ewes nursing Suffolk-cross twin lambs over three grazing seasons,

Cited by 17 publications

References 15 publications

Growth and carcass composition of lambs of two breeds and their cross grazing ryegrass and clover swards

Growth and carcass composition of lambs of two breeds and their cross grazing ryegrass and clover swards

Effects of clover and milk in the diet of grazed lambs on meat quality

Effects of clover in the diet of grazed lambs on production and carcass composition

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