Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation
| Autor: | Giovanni Molle, Mondina Francesca Lunesu, Antonello Cannas, Mauro Decandia, Giovanni Cristoforo Bomboi, Alberto Stanislao Atzori |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
insulin
goats 040301 veterinary sciences Starch medicine.medical_treatment Veterinary medicine Biology Growth hormone Article 0403 veterinary science chemistry.chemical_compound Animal science Lactation fat SF600-1100 medicine milk production Dietary starch non-fiber carbohydrates General Veterinary Insulin 0402 animal and dairy science food and beverages ewes body reserves 04 agricultural and veterinary sciences Milk production biology.organism_classification 040201 dairy & animal science medicine.anatomical_structure chemistry QL1-991 ruminants growth hormone Animal Science and Zoology Sarda Zoology Dietary Carbohydrates |
| Zdroj: | Animals, Vol 11, Iss 1222, p 1222 (2021) Animals Volume 11 Issue 5 Animals : an Open Access Journal from MDPI |
| ISSN: | 2076-2615 |
| Popis: | 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 p = 0.019) and daily milk net energy (NEL p = 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 p = 0.008), and NEL (p = 0.008), compared to the HS diet. In addition, BCS was greater in HS than in LS ewes (3.53 vs. 3.38 p = 0.008). Goats had a higher growth hormone (GH) and lower insulin concentration than ewes (GH: 2.62 vs. 1.37 ng/mL p = 0.04 insulin: 0.14 vs. 0.38 µg/L p < 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. |
| Databáze: | OpenAIRE |
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