Fatty acid, tocopherol and carotenoid content of botanically diverse pastures rotationally grazed by ruminant livestock in Ireland

IF 4.8 Q1 AGRICULTURE, MULTIDISCIPLINARY

Journal of Agriculture and Food Research Pub Date : 2025-05-27 DOI:10.1016/j.jafr.2025.102050

Michelle Kearns, Peter G. Dunne, Jean-Christophe Jacquier, Sabine M. Harrison, Raquel Cama-Moncunill, Gaspard Beaucarne, Helen Sheridan, Tommy M. Boland, Frank J. Monahan

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Abstract

Pasture samples from (i) perennial ryegrass (Lolium perenne, L.; (PRG), (ii) PRG + white clover (Trifolium repens, L. (WC); PRG + WC) and (iii) multi-species (MS; PRG, timothy (Phleum pratense L.), WC, red clover (Trifolium pratense L.), chicory (Cichorium intybus L.) and plantain (Plantago lanceolata L.) pastures were collected from rotationally grazed paddocks throughout 2021. Higher levels of the fatty acids (FA) C16:0, C18:2n-6c and C18:3n-3c occurred in late-season for all pastures. C18:2n-6c contents were higher in MS pasture compared to PRG and PRG + WC pastures for all seasons, whereas C18:3n-3c contents were higher in PRG pasture than PRG + WC and MS pasture in mid- and late-seasons. Higher levels of tocopherols and carotenoids were observed in late-season for all pastures. Although α-tocopherol concentrations were similar between pastures, γ-tocopherol and lutein concentrations were higher in MS pasture. In conclusion, MS pastures can produce equivalent FA concentrations, along with increased γ-tocopherol and lutein concentrations compared to PRG pastures.

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爱尔兰反刍家畜轮牧的不同植物牧场的脂肪酸、生育酚和类胡萝卜素含量

(1)多年生黑麦草（Lolium perenne， L.）的牧草样品；（PRG），（ii） PRG +白三叶草（Trifolium repens， L.， WC）；PRG + WC)和（iii）多物种(MS；在2021年期间，在轮换放牧的围场中采集了PRG， timothy (Phleum pratense L.)， WC，红三叶草（Trifolium pratense L.），菊苣（Cichorium intybus L.）和车前草（Plantago lanceolata L.）牧场。脂肪酸（FA） C16:0、C18:2n-6c和C18:3n-3c均在牧草季末出现较高水平。牧草C18:2n-6c含量在四季中均高于PRG和PRG + WC，而牧草C18:3n-3c含量在中后期均高于PRG + WC和MS。所有牧场的生育酚和类胡萝卜素含量在晚育期均较高。虽然各牧场α-生育酚浓度相近，但MS牧场γ-生育酚和叶黄素浓度较高。综上所述，与PRG牧场相比，MS牧场可以产生相当的FA浓度，同时γ-生育酚和叶黄素浓度增加。

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