Influence of fertiliser nitrogen on higher fatty acids and on Mg, Ca, K, and P in grazed grass-clover herbage

Molloy, L. F.; Ball, R. S.; Collie, T. W.; Ross, D. J.

doi:10.1080/00288233.1978.10427383

Cited by 12 publications

(5 citation statements)

References 23 publications

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“…The primary purpose for using N fertilisers is to increase pasture yield and, as a result of high N responses, N fertiliser usage has steadily increased. Early research focused on effects of N on dry matter (DM) production [3][4][5][6], herbage quality [7,8], pasture composition [9], and technology of N fertiliser application [4][5][6]10].…”

Section: Introductionmentioning

confidence: 99%

Fertiliser Nitrogen and Factors Affecting Pasture Responses

Sun¹,

Longhurst²,

Luo³

et al. 2008

TOASJ

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Nitrogen (N) is an essential plant element. However, its supply from soil compared to its demand by crops as well as pasture plants is the most limiting amongst soil nutrients. Pastures respond well to N application. N utilization efficiency can be 9-28 kg dry matter per 1 kg N applied. As a result, N fertilisers are increasingly applied for high pasture production. How pastures respond to N and the factors affecting responses are crucial to the efficient use of N fertilisers. After fertiliser N is applied, N is rapidly absorbed into plants and growth stimulated via improvement of root systems and photosynthetic activity. Pasture production increases depend on botanical composition, cultivars and physiological state. Pasture growth is improved immediately after N application. This effect can last into the next growing period following initial defoliation. The carryover N effect may increase plant growth, but can be negative in some cases. New Zealand studies showed positive N carryover effects present for first two cuts, inconsistent at third, and negative for fourth and fifth cuts. Pasture composition, N fixation by legumes and herbage nutrient concentration all respond to N application. Pastures response to N flux varies with various factors, including N form, rate applied, and frequency and timing of application. Dry matter yields in pure grass pastures increases linearly with N application rate up to 200-400 kg N ha-1 per year. Split N applications improve annual yield and seasonal yield distribution. Spring applications gave greater N responses than autumn applications. N responses are also affected by climate, geographical factors, and soil factors, such as type, texture, drainage, pH, fertility, moisture and temperature.

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Section: Introductionmentioning

confidence: 99%

Fertiliser Nitrogen and Factors Affecting Pasture Responses

Sun¹,

Longhurst²,

Luo³

et al. 2008

TOASJ

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“…The fatty acid composition was characterized by higher concentration of C18:3 and lower concentration of C16:0 compared with other reports (Mayland et al 1976;Molloy et al 1978;Boufaied et al 2003a). Many factors can influence the fatty acid concentration and composition of forages including species, maturity, fertility and season (Boufaied et al 2003a).…”

Section: Fatty Acid Composition Of Dietsmentioning

confidence: 36%

“…The average lipid concentration of the pasture during the grazing season was about 25 g kg -1 of forage DM, which was a fairly typical value for temperate grasses (Molloy et al 1978;French et al 2000;Boufaied et al 2003a). The fatty acid composition was characterized by higher concentration of C18:3 and lower concentration of C16:0 compared with other reports (Mayland et al 1976;Molloy et al 1978;Boufaied et al 2003a).…”

Section: Fatty Acid Composition Of Dietsmentioning

confidence: 99%

“…These conditions, such as high ruminal pH, active cellulolytic bacteria, and high rate of passage (Martin and Jenkins 2002;Lee et al 2003), are associated with pasture feeding. Further, forages typically contain high concentrations of PUFA (Mayland et al 1976;Molloy et al 1978;Boufaïed et al 2003a). Thus, pasture of high nutritive value is one of the most effective diets for elevating CLA and PUFA content of both milk (Kelly et al 1998) and meat (French et al 2000).…”

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confidence: 99%

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Meat quality and fatty acid composition of pasture-finished beef steers fed barley and soybeans

Duynisveld¹,

Charmley²,

Mir³

2006

Can. J. Anim. Sci.

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Duynisveld, J. L., Charmley, E. and Mir, P. 2006. Meat quality and fatty acid composition of pasture-finished beef steers fed barley and soybeans. Can. J. Anim. Sci. 86: 535-545. The effect of supplemention on the performance, carcass characteristics, meat quality, and fatty acid composition of pasture-finished cattle was studied. Thirty-two steers were assigned to four treatments in a randomized block design. Treatments were: totally mixed ration (TMR) [confinement-fed total mixed ration (60% grass silage, 40% rolled barley], pasture only (rotationally grazed temperate mixed pasture); pasture plus barley (the same pasture plus 4.5 kg DM hd -1 d -1 rolled barley) and pasture plus soybeans (the same pasture plus 1.8 kg DM hd -1 d -1 whole roasted soybeans). Steers were slaughtered after 105 d on test. Tissue samples were collected at slaughter for analysis of meat quality and fatty acid content. Dry matter (DM) intakes were greater for TMR-fed cattle (P < 0.05). Among the pasture-fed cattle those fed barley (P < 0.05) consumed more total DM than those given pasture alone. Rates of BW gain were higher for TMR-fed steers than those fed pasture only (P < 0.05). Carcass weights and dressing percentage were similar across all treatments. Feeding barley or soybeans on pasture increased backfat thickness (P < 0.05), but the pasture-only cattle had greater loin eye area (P < 0.05). Pasture-only beef had more thaw drip loss (P < 0.05) and less cooking drip loss (P < 0.05) than TMR-fed beef. Evaporative cooking losses were greater in beef from unsupplemented pasture than from barley-or soybean-supplemented pasture (P < 0.05). Pasture-only beef had 25% more polyunsaturated fatty acids and 37% greater cis-9, trans-11 conjugated linoleic acid (CLA) concentrations in longisimus thoracis (l. thoracis) tissue than TMR-fed beef (P < 0.05). Among pasture-fed cattle, soybean supplementation increased C18:2 concentration by 34% (P < 0.05), while barley reduced C18:3 concentration by 8% (P < 0.05) in l. thoracis tissue. Soybean supplementation increased cis-9, trans-11 CLA concentration by 30% (P < 0.05) in l. thoracis tissue over pasture only. Beef finished on pasture has higher levels of beneficial fatty acids than TMR-fed beef, with few differences in meat quality. Supplementation on pasture improves animal performance, but barley has some negative effects on beneficial fatty acids in meat. Les auteurs se sont intéressés à l'incidence des suppléments sur la performance, les paramètres de la carcasse, la qualité de la viande et la composition des acides gras des bovins finis au pâturage. Pour cela, ils ont réparti 32 bouvillons entre quatre traitements selon un dispositif en blocs aléatoires. Les traitements étaient les suivants :TMR (ration mixte totale fournie en claustration -60 % d'ensilage d'herbe, 40 % de flocons d'orge); paissance (pâturage mixte de région tempérée en rotation); paissance plus orge (même pâturage plus 1,8 kg de matière sèche par tête et par jour sous forme de flocons d'orge); paissance plus soja (même pâtura...

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“…Both are marginal for Roa and S170, and may be a poorer quality feed than Ariki rye grass from this viewpoint. In mixed grass/legume pastures this is less likely to be a problem (Molloy et a\. 1978).…”

Section: Discussionmentioning

confidence: 99%

‘Grasslands Roa’ tall fescue: Herbage dry matter production and quality under mowing

Anderson¹,

Brock²,

Boyd³

et al. 1982

New Zealand Journal of Experimental Agriculture

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In pure swards at sites in 4 regions of New Zealand, Roa and S170 tal1 fescue (Fesluca arundinacea Schreb.) established slower than Ariki rye grass (Lolium x hybridum Hausskn). Ariki rye grass was generally superior to tall fescue at sites where soil moisture levels were maintained throughout the year (because of even rainfal1 or heavier soils), whereas tall fescue was more productive in areas prone to long periods of moisture stress (summer drought andlor light soils) particularly over the summer-autumn period. Roa tall fescue was better than S170 under frequent cutting but similar under infrequent cutting. Herbage of Roa tall fescue had a higher acceptability to sheep than S170.

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Influence of fertiliser nitrogen on higher fatty acids and on Mg, Ca, K, and P in grazed grass-clover herbage

Cited by 12 publications

References 23 publications

Fertiliser Nitrogen and Factors Affecting Pasture Responses

Fertiliser Nitrogen and Factors Affecting Pasture Responses

Meat quality and fatty acid composition of pasture-finished beef steers fed barley and soybeans

‘Grasslands Roa’ tall fescue: Herbage dry matter production and quality under mowing

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