Increasing the concentrations of beneficial polyunsaturated fatty acids in milk produced by dairy cows in high-forage systems

Dewhurst, Richard J.; Shingfield, Kevin J.; Lee, Michael R. F.; Scollan, Nigel D.

doi:10.1016/j.anifeedsci.2006.04.016

Cited by 460 publications

(535 citation statements)

References 126 publications

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“…Due to the increased level of PUFA and n-3 FA, the sulla cheeses resulted in a more beneficial FA profile for the health needs of consumers (Bauman et al, 2006;Dewhurst et al, 2006;Chilliard et al, 2007). These results do not appear to be supported by the LA and ALA intake due to grazing sulla, which were comparable with those with ryegrass, but can be explained by the intake of sulla CT that would have been able to inhibit the activity of ruminal microorganisms in biohydrogenating PUFA, as demonstrated by Cabiddu et al (2009), and then favour PUFA transfer in milk and cheese.…”

Section: Discussionmentioning

confidence: 99%

Effects of ewes grazing sulla or ryegrass pasture for different daily durations on forage intake, milk production and fatty acid composition of cheese

Bonanno

Grigoli

Mazza

et al. 2016

animal

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Sulla (Sulla coronarium L.) forage is valued for its positive impact on ruminant production, in part due to its moderate content of condensed tannin (CT). The duration of daily grazing is a factor affecting the feed intake and milk production of ewes. In this study, the effects of grazing sulla pasture compared with annual ryegrass, and the extension of grazing from 8 to 22 h/day, were evaluated with regard to ewe forage intake and milk production, as well as the physicochemical properties and fatty acid (FA) composition of cheese. During 42 days in the spring, 28 ewes of the Comisana breed were divided into four groups (S8, S22, R8 and R22) that grazed sulla (S) or ryegrass (R) for 8 (0800 to 1600 h) or 22 h/day, and received no feeding supplement. In six cheese-making sessions, cheeses were manufactured from the 48 h bulk milk of each group. Compared with ewes grazing ryegrass, those grazing sulla had higher dry matter (DM) intake, intake rate and milk yield, and produced milk that was lower in fat and higher in casein. Ewes grazing for 22 h spent more time eating, which reduced the intake rate, increased DM and nutrient intake and milk yield, and reduced milk fat. Due to the ability of CT to inhibit the complete ruminal biohydrogenation of polyunsaturated fatty acids (PUFA), the FA composition of sulla cheese was more beneficial for consumer health compared with ryegrass cheese, having lower levels of saturated fatty acids and higher levels of PUFA and n-3 FA. The FA profile of S8 cheese was better than that of S22 cheese, as it was higher in branched-chain FA, monounsaturated FA, PUFA, rumenic acid (c9,t11-C18:2), and had a greater health-promoting index. The effect of short grazing time on sulla was attributed to major inhibition of PUFA biohydrogenating ruminal bacteria, presumably stimulated by the higher accumulation of sulla CT in the rumen, which is related to a higher intake rate over a shorter eating time. Thus, grazing sulla improved the performance of ewes, thereby increasing, especially with short grazing time, the nutritional properties of cheese fat.

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Section: Discussionmentioning

confidence: 99%

Effects of ewes grazing sulla or ryegrass pasture for different daily durations on forage intake, milk production and fatty acid composition of cheese

Bonanno

Grigoli

Mazza

et al. 2016

animal

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“…While omega‐3 has traditionally been considered beneficial only when maintained in a suitable ratio with omega‐6, some research has subsequently challenged this theory, suggesting that the benefit of omega‐3 should be considered solely in terms of total intake (Stanley et al., 2007). Importantly, omega‐3 content of meat products is known to be manipulated through livestock feeding strategies (Dewhurst, Shingfield, Lee, & Scollan, 2006; McAfee et al., 2010); in other words, a change in on‐farm practice will likely have direct impacts on LCA results when the functional unit is altered from mass‐based to nutrition‐based.…”

Section: Effects Of Farming Systems On Meat Qualitymentioning

confidence: 99%

Framework for life cycle assessment of livestock production systems to account for the nutritional quality of final products

McAuliffe

Takahashi

Lee

2018

Food and Energy Security

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Life cycle assessment (LCA) is widely regarded as a useful tool for comparing the environmental impacts of multiple livestock production systems. While LCA results are typically communicated in the form of environmental burdens per mass unit of the end product, it is increasingly becoming recognized that the product quality also needs to be accounted for to truly understand the value of a farming system to society. To date, a number of studies have examined environmental consequences of different food consumption patterns at the diet level; however, few have addressed nutritional variations of a single commodity attributable to production systems, leaving limited insight into how on‐farm practices can be improved to better balance environment and human nutrition. Using data from seven livestock production systems encompassing cattle, sheep, pigs, and poultry, this paper proposes a novel framework to incorporate nutritional value of meat products into livestock LCA. The results of quantitative case studies demonstrate that relative emissions intensities associated with different systems can be dramatically altered when the nutrient content of meat replaces the mass of meat as the functional unit, with cattle systems outperforming pig and poultry systems in some cases. This finding suggests that the performance of livestock systems should be evaluated under a whole supply chain approach, whereby end products originating from different farm management strategies are treated as competing but separate commodities.

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“…Forages such as grass and clover contain a high proportion (50% to 75%) of total acids as linolenic acid (Dewhurst et al, 2006) and its content in tissues is directly related to the dietary intake of the animal. The greater proportion of C 18:3n-3 found in foals from the FES group (18.78%) can be attributed to them having eaten only pasture until they were slaughtered and is in good agreement with those reported in a previous study (Lorenzo et al, 2010).…”

Section: Lorenzo Crecente Franco Victoria Sarriés and Gómezmentioning

confidence: 99%

The effect of livestock production system and concentrate level on carcass traits and meat quality of foals slaughtered at 18 months of age

Lorenzo¹,

Crecente

Sarriés

et al. 2014

Animal

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This trial was conducted to study the effect of livestock production system (freedom extensive system (FES) v. semi extensive system (SES)) and amount of finishing feed (1.5 v. 3.0 kg of commercial feed) in SES on carcass characteristics, meat quality and nutritional value of meat foal slaughtered at 18 months of age. For this study, a total of 49 foals (21 from FES and 28 from SES) were used. The obtained results showed that SES had a positive influence on carcass characteristic because these foals showed the best values for live weight, carcass weight, dressing percentage, perimeter of leg (PL) and carcass compactness index. On the other hand, finishing feeding also had a significant ( P < 0.05) effect on PL and lean thickness, as the highest values were obtained in foals finished with 3 kg of commercial fodder. The physico-chemical properties were significantly affected by the livestock production system with the exception of ashes content ( P > 0.05). Foals finished in SES increased in 408% the intramuscular fat content (0.23 v. 1.17%, for foals reared in FES and SES, respectively). On the other hand, L*-value and a*-value were significantly ( P < 0.01) affected by livestock production system, as foals from the FES group had a more intense redder color (higher CIE a*-value) and higher lightness (higher CIE L*-value) compared with those from the SES group. Finally, meat nutritional value was significantly affected by livestock production system, as foals from an extensive production system on wood pasture could be considered as healthier in relation to their fatty acid profiles (low n-6/n-3 ratio and high hypocholesterolemic/hypercholesterolemic ratio) as a result of the beneficial grass intake on meat fatty acid profile.

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Increasing the concentrations of beneficial polyunsaturated fatty acids in milk produced by dairy cows in high-forage systems

Cited by 460 publications

References 126 publications

Effects of ewes grazing sulla or ryegrass pasture for different daily durations on forage intake, milk production and fatty acid composition of cheese

Effects of ewes grazing sulla or ryegrass pasture for different daily durations on forage intake, milk production and fatty acid composition of cheese

Framework for life cycle assessment of livestock production systems to account for the nutritional quality of final products

The effect of livestock production system and concentrate level on carcass traits and meat quality of foals slaughtered at 18 months of age

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