Fatty acid, tocopherol and carotenoid content in herbage and milk affected by sward composition and season of grazing

Larsen, Mette Krogh; Fretté, Xavier; Kristensen, Troels; Eriksen, Jørgen; Søegaard, Karen; Nielsen, Jacob Holm

doi:10.1002/jsfa.5620

Cited by 23 publications

(21 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Information about tocopherol content in fresh forage is not consistent (Kalac 2012). Larsen et al (2012) reported that the concentrations of α-tocopherol in various grasses and legumes vary considerably with plant maturity and, to a lesser extent, with species. They reported a concentration of 36 mg in 1 kg DM lucerne mix.…”

Section: Discussionmentioning

confidence: 99%

A mobile system for rearing meat chickens on pasture

Skřivan¹,

Pickinpaugh²,

Pavlů³

et al. 2015

CZECH J ANIM SCI

View full text Add to dashboard Cite

ABSTRACT:The effect of grazing on the productive performance and meat quality was evaluated for chickens (Ross 308, n = 192). Chickens were kept in two pens on wooden shavings (2 × 96) from one day of age. On day 23 of age, one group was moved to a pasture and kept in a portable floorless pen with an area of 0.11 m 2 per chicken. The field portion of the experiment was conducted from the 1 st till the 18 th of June 2013. A control group was kept in the original pen until the end of the experiment at 6 weeks of age. Both groups were fed the same pelleted feed ad libitum. For the pasture-reared group, the moveable shelter was moved twice daily around the pasture with a predominance of grass species. The herbage intake of chickens was indirectly assessed by compressed sward height measurement after each cage movement, which employed a rising plate-meter. In the pasture, chickens preferred grass over clover. There was no significant effect of grazing observed on chicken body weight. The mortality of chickens in the grazing group was lower than that in the control group. Pasture treatment improved meat flavour by 9% (P = 0.014), produced breast meat with significantly higher (P = 0.009) redness, and almost doubled the concentration of α-tocopherol (P < 0.001). There were no significant effects of grazing on the dry matter, fat, cholesterol or pH of the meat. The production of TBARS in the breast meat of the pasture group after storage at 4°C for 5 days was lower (P = 0.013) than that in the breast meat of the control chickens. Although the differences between K, Ca, P, Mg, and N concentrations in pasture and soil before and after grazing reached 20%, these differences were not significant.

show abstract

Section: Discussionmentioning

confidence: 99%

A mobile system for rearing meat chickens on pasture

Skřivan¹,

Pickinpaugh²,

Pavlů³

et al. 2015

CZECH J ANIM SCI

View full text Add to dashboard Cite

show abstract

“…As the 2 pastures did not differ in the total proportions of non-legume dicotyledons (hypothesis 1), but mainly in the proportions of red clover and white clover it was not likely that differences in botanical composition would affect milk FA composition as Larsen et al (2012) and Wiking et al (2010) found only minor effects of grazing red clover or white clover on milk FA composition. If this is true, we suggest that annual and biannual non-legume docotyledons commonly found in herbage from SP have similar effects on milk FA composition as perennial dicotyledons usually found in herbage from LP.…”

Section: Effect Of Pasture Type On Milk Compositionmentioning

confidence: 92%

“…Compared to grass (Poaceae) based silages, silages based on mixed leys with grass and red clover (Trifolium pratense L.) or white clover (Trifoilum repens L.) increase the milk-fat proportions of C18:3 n-3 (Dewhurst et al, 2003). No or inverse effects on proportions of C18:3 n-3 are reported when cows graze red clover rich pastures compared to white clover rich pastures (Larsen et al, 2012;Wiking et al, 2010). Soder et al (2006) found increasing milk-fat proportions of C18:2c9t11 for cows grazing more botanical diverse forage mixtures, however, C18:3 n-3 was not affected.…”

Section: Introductionmentioning

confidence: 99%

Fatty acid composition, fat-soluble vitamin concentrations and oxidative stability in bovine milk produced on two pastures with different botanical composition

et al. 2013

View full text Add to dashboard Cite

a b s t r a c tPrevious research has shown that grazing pastures compared to feeding preserved forages has large impact on milk fatty acid (FA) composition, but differences between grazing red clover (Trifolium pratense L.) or white clover (Trifolium repens L.) are small, whereas the herbage proportions of dicotyledon botanical families is positively correlated with the milk-fat proportions of total polyunsaturated FA when grazing pastures in the Alps. The objective of the present study was to investigate the influence of botanically different pastures on bovine milk composition and milk susceptibility to oxidation. Two groups of 8 multiparous Norwegian Red dairy cows [mean (standard deviation); 599 (45.1) kg body weight, 73 (15.0) d in milk, 29.9 (2.90) kg milk/d at experiment start] grazed either a short-term pasture (SP) or a long-term pasture (LP). Both pastures were organically managed, meaning that no artificial fertilizers or herbicides were applied. The SP was representative for pastures, which are frequently, i.e. at least every third year, renewed by soil tillage and seeding, whereas LP was representative for pastures, which are less frequently renewed. The SP contained mainly meadow fescue (Festuca pratensis Huds.), timothy (Phleum pratense L.) and red clover and LP contained smooth meadow grass (Poa pratensis L.), white clover and a variety of unsown species. Sixteen cows were blocked according to milk yield, days in milk and sire, and randomly within block allocated to the 2 dietary treatments with a daily pasture allowance of 15-20 kg dry matter per cow, supplemented with 3.0 kg barley (Hordeum vulgare L.) concentrate. Milk was sampled during the last week of 3 experimental periods and analysed for FA composition by gas chromatography, concentrations of fat-soluble vitamins by high performance liquid chromatography, and oxidative stability in a light-exposure experiment by measuring the formation of hydroperoxides and by front-face fluorescence spectroscopy. Pasture type had no effect on milk yield, milk gross composition, and only minor effects on milk FA composition. Milk from SP had higher concentration of α-tocopherol than LP. The formation of hydroperoxides in milk was lower for SP than LP after 24 h light .no (S.A. Adler).Livestock Science 154 (2013) 93-102 exposure, but no differences were found after 48 h. Front-face fluorescence spectroscopy revealed slightly higher formation of components in the area of 409-480 nm wavelength for SP than LP, which may be related to milk-lipid oxidation. The experimental pastures differed mainly in herbage proportions of red clover and white clover and less in proportions of non-legume dicotyledons. This explains small differences in milk FA composition and milk susceptibility to oxidation.

show abstract

“…Recently, interest on tocopherol and carotenoid composition of botanical species of natural grasslands has emerged due to their potential use as biomarkers of foods derived from grass feeding animals such as milk, cheese and meat (Prache, Cornu, Berdagué, & Priolo, 2005;Prache, Priolo, & Grolier, 2003). However, studies on tocopherol and carotenoid composition of plants from natural grasslands are scarce in the scientific literature (Cardinault et al, 2008;Larsen et al, 2012;Noziére et al, 2006). The most frequently referenced methods for the analysis of carotenoids and tocopherols in plant material are primarily based on solid-liquid extraction followed by separation by high-performance liquid chromatography (HPLC) ( Table 1, and references therein).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous analysis of carotenoids and tocopherols in botanical species using one step solid–liquid extraction followed by high performance liquid chromatography

et al. 2015

View full text Add to dashboard Cite

Fatty acid, tocopherol and carotenoid content in herbage and milk affected by sward composition and season of grazing

Abstract: All four herbages tested were suitable for production of milk with a high content of beneficial compounds. Thus any of these herbages could be used in production of such differentiated milk based on a large proportion of grazing in the ration.

Cited by 23 publications

References 28 publications

A mobile system for rearing meat chickens on pasture

A mobile system for rearing meat chickens on pasture

Fatty acid composition, fat-soluble vitamin concentrations and oxidative stability in bovine milk produced on two pastures with different botanical composition

Simultaneous analysis of carotenoids and tocopherols in botanical species using one step solid–liquid extraction followed by high performance liquid chromatography

Contact Info

Product

Resources

About