Milk fatty acid profile from grazing buffaloes fed a blend of soybean and linseed oils

Abstract

The aim of the study was to examine the changes in milk fatty acid (FA) profile of grazing buffaloes fed either low (L, 276g/d) or high (H, 572g/d) doses of a blend (70:30, wt/wt) of soybean and linseed oils. Fourteen multiparous Mediterranean buffaloes grazing on a native pasture were fed 4 kg/day of a commercial concentrate containing no supplemental oil over a pre-experimental period of ten days. The baseline milk production and composition and milk FA profile were measured over the last three days. After this pre-experimental period the animals received the same concentrate added with either the L or H oil doses for 26 additional days. Milk yield (g/animal/day) did not differ at the start (1776 ± 522 and 1662 ± 291 for L and H, respectively, P<0.622) or at the end of the trial (4590 ± 991 and 4847 ± 447 in L and H, respectively, P<0.543). Baseline milk fat content (g/kg) averaged 77.1 (±20.5) in L and 74.3 (±9.9) in H (P<0.10) and was reduced (P<0.031) to 60.7 (±23.6) and 49.4 (±11.2) (P<0.0031) respectively after L and H with no differences between treatments (P<0.277). Baseline milk protein content (L=43.2 ± 3.4 and H= 44.3 ± 6.9g/kg) increased after oil supplementation (P<0.0001) in both L (73.2 ± 6.0g/kg) and H (68.4 ± 4.9g/kg) without differences between oil doses (P<0.123). Milk fat content of 14:0 decreased after oil supplementation only in the H treatment (5.29 to 4.03, P<0.007) whereas that of 16:0 was reduced (P<0.001) at both L (24.49 to 19.75g/100g FA) and H (25.92 to 19.17g/100g FA) doses. The reduction of total content of 12:0 to 16:0 was higher (P<0.052) in H (32.02 to 23.93g/100g FA) than L (30.17 to 25.45g/100g FA). Vaccenic acid content increased (P<0.001) from 5.70 to 13.24g/100g FA in L and from 5.25 to 16.77 in H, with higher results in the in H treatment (P<0.001). Baseline rumenic acid was sharply increased (P<0.001) in L (1.80 to 4.09g/100g FA, +127%) and H (1.60 to 4.61g/100g FA, +187%) with no differences between L and H (P<0.19). Overall, these results indicate a pronounced improvement in the nutritional value of milk fat from grazing buffaloes fed little amounts (0.276g/day) of a blend of soybean and linseed oils.

Fatty-acid composition of buffalo milk under intensive and pasture farming

“…The fatty-acid profile was found to be similar to that of cow milk in determined by previous study (Penchev et al, 2016), also establishing the effect of diet, as it has been done with buffaloes abroad (Fernandes et al, 2007;Gagliostro et al, 2015;Pegolo et al, 2017).…”

“…Brazil (Gagliostro et al, 2015), the beneficial FAs in milk from pasture in present study are generally lower, while compared to the buffaloes of the Mediterranean type in Romania (Vidu et al, 2015) they are better.…”

Effects of Feeding Combinations of Soybean and Linseed Oils on Productive Performance and Milk Fatty Acid Profile in Grazing Dairy Cows

“…Partial ruminal biohydrogenation of linolenic acid also yields VA and the inhibition in the conversion of VA to stearic acid (C18:0) [9] [10] may also contribute to increase milk RA content avoiding a shift towards the formation of undesirable FAs like trans-10 C18:1 [11] which may be detrimental to human health [12]. Supplementation with LO can also reduce (or contribute to maintain) the milk n − 6/n − 3 ratio close to 5 in cows [4], goats [13], ewes [14] and buffaloes [15]. The objective of the experiment was to quantify the effectiveness of the combination of SO and LO on productive performance and milk FA profile in order to obtain a functional bovine milk …”

Fraud with the addition of cow's milk alters the lipid fraction of buffalo mozzarella

“…The crude protein content in the buffalo milk varies between 4.32-4.43% (Gagliostro et al, 2015) while cow milk varies between 3.00-3.28% (Feltes et al, 2016;Bondan et al, 2018). Considering these facts, the addition of milk of lower crude protein content to the cheese-making mixture should decrease the cheese crude protein content.…”