Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation
Evolution of milk production, body reserves and blood metabolites and their relationships with dietary carbohydrates were compared in 30 Sarda dairy ewes and 26 Saanen dairy goats in mid-lactation. From 92 to 152 ± 11 days in milk (DIM), each species was allocated to two dietary treatments: high-sta...
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MDPI AG
2021-04-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/11/5/1222 |
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| author | Mondina Francesca Lunesu Mauro Decandia Giovanni Molle Alberto Stanislao Atzori Giovanni Cristoforo Bomboi Antonello Cannas |
| author_facet | Mondina Francesca Lunesu Mauro Decandia Giovanni Molle Alberto Stanislao Atzori Giovanni Cristoforo Bomboi Antonello Cannas |
| author_sort | Mondina Francesca Lunesu |
| collection | DOAJ |
| description | Evolution of milk production, body reserves and blood metabolites and their relationships with dietary carbohydrates were compared in 30 Sarda dairy ewes and 26 Saanen dairy goats in mid-lactation. From 92 to 152 ± 11 days in milk (DIM), each species was allocated to two dietary treatments: high-starch (HS: 20.0% starch, on DM basis) and low-starch (LS: 7.8% starch, on DM basis) diets. In mid-lactating goats, the HS diet increased fat-corrected milk yield (FCM (3.5%); 2.65 vs. 2.53 kg/d; <i>p</i> = 0.019) and daily milk net energy (NE<sub>L</sub>; <i>p</i> = 0.025), compared to the LS diet. The body condition score (BCS) was not affected. In mid-lactating ewes, the LS diet increased FCM (6.5%) (1.47 vs. 1.36 kg/d; <i>p</i> = 0.008), and NE<sub>L</sub> (<i>p</i> = 0.008), compared to the HS diet. In addition, BCS was greater in HS than in LS ewes (3.53 vs. 3.38; <i>p</i> = 0.008). Goats had a higher growth hormone (GH) and lower insulin concentration than ewes (GH: 2.62 vs. 1.37 ng/mL; <i>p</i> = 0.04; insulin: 0.14 vs. 0.38 µg/L; <i>p</i> < 0.001 in goats and ewes, respectively). In conclusion, in mid-lactation, the two species responded differently to dietary carbohydrates, probably due to differences in the concentration of GH and insulin. The HS diet favored milk yield in goats and body reserve accumulation in ewes. In ewes, the partial replacement of starch with highly digestible fiber increased energy partitioning in favor of milk production. |
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| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-03-10T12:02:16Z |
| publishDate | 2021-04-01 |
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| spelling | doaj.art-cbff451993064c1498c933a603602edb2023-11-21T16:52:44ZengMDPI AGAnimals2076-26152021-04-01115122210.3390/ani11051222Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-LactationMondina Francesca Lunesu0Mauro Decandia1Giovanni Molle2Alberto Stanislao Atzori3Giovanni Cristoforo Bomboi4Antonello Cannas5Dipartimento di Agraria, Sezione di Scienze Zootecniche, Università degli studi di Sassari, Viale Italia 39, 07100 Sassari, ItalyAgris Sardegna, Loc. Bonassai, 07100 Sassari, ItalyAgris Sardegna, Loc. Bonassai, 07100 Sassari, ItalyDipartimento di Agraria, Sezione di Scienze Zootecniche, Università degli studi di Sassari, Viale Italia 39, 07100 Sassari, ItalyDipartimento di Medicina Veterinaria, Sezione di Biochimica, Università degli studi di Sassari, Via Vienna 2, 07100 Sassari, ItalyDipartimento di Agraria, Sezione di Scienze Zootecniche, Università degli studi di Sassari, Viale Italia 39, 07100 Sassari, ItalyEvolution of milk production, body reserves and blood metabolites and their relationships with dietary carbohydrates were compared in 30 Sarda dairy ewes and 26 Saanen dairy goats in mid-lactation. From 92 to 152 ± 11 days in milk (DIM), each species was allocated to two dietary treatments: high-starch (HS: 20.0% starch, on DM basis) and low-starch (LS: 7.8% starch, on DM basis) diets. In mid-lactating goats, the HS diet increased fat-corrected milk yield (FCM (3.5%); 2.65 vs. 2.53 kg/d; <i>p</i> = 0.019) and daily milk net energy (NE<sub>L</sub>; <i>p</i> = 0.025), compared to the LS diet. The body condition score (BCS) was not affected. In mid-lactating ewes, the LS diet increased FCM (6.5%) (1.47 vs. 1.36 kg/d; <i>p</i> = 0.008), and NE<sub>L</sub> (<i>p</i> = 0.008), compared to the HS diet. In addition, BCS was greater in HS than in LS ewes (3.53 vs. 3.38; <i>p</i> = 0.008). Goats had a higher growth hormone (GH) and lower insulin concentration than ewes (GH: 2.62 vs. 1.37 ng/mL; <i>p</i> = 0.04; insulin: 0.14 vs. 0.38 µg/L; <i>p</i> < 0.001 in goats and ewes, respectively). In conclusion, in mid-lactation, the two species responded differently to dietary carbohydrates, probably due to differences in the concentration of GH and insulin. The HS diet favored milk yield in goats and body reserve accumulation in ewes. In ewes, the partial replacement of starch with highly digestible fiber increased energy partitioning in favor of milk production.https://www.mdpi.com/2076-2615/11/5/1222non-fiber carbohydratesmilk productionbody reservesewesgoatsinsulin |
| spellingShingle | Mondina Francesca Lunesu Mauro Decandia Giovanni Molle Alberto Stanislao Atzori Giovanni Cristoforo Bomboi Antonello Cannas Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation Animals non-fiber carbohydrates milk production body reserves ewes goats insulin |
| title | Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation |
| title_full | Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation |
| title_fullStr | Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation |
| title_full_unstemmed | Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation |
| title_short | Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation |
| title_sort | dietary starch concentration affects dairy sheep and goat performances differently during mid lactation |
| topic | non-fiber carbohydrates milk production body reserves ewes goats insulin |
| url | https://www.mdpi.com/2076-2615/11/5/1222 |
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