PSVI-13 Nutritional Supplementation with Leftover Food of Dairy Cows Upon Reproductive Response of Goats

Autor: Ma Angeles de Santiago, Maria G Machado, Dalia Ivette Carrillo-Moreno, Fernando Arellano-Rodríguez, Juan M Guillen, Viridiana Contrearas, Francisco Gerardo Véliz-Deras
Rok vydání: 2022
Předmět:
Zdroj: Journal of Animal Science. 100:400-401
ISSN: 1525-3163
0021-8812
DOI: 10.1093/jas/skac247.733
Popis: To evaluate the effect of nutritional supplementation with leftover food of dairy cows upon the reproductive response of multiracial female goats fed in open range in northern Mexico (26°N, 104°W), 38 multiparous goats in extensive grazing conditions were randomly assigned to two groups with similar weight (BW; Kg) and body condition score (BCS; scale 1-5). The control group (CG; n=19; BCS 1.7± 0.03; BW 60.42 ± 1.5 Kg, fed only in native vegetation) and supplemented group (SG; n=19; BCS; 1.7± 0.07; BW 60.21± 0.97 Kg) were fed native vegetation plus a nutritional supplementation with a ration fully mixed of leftover dairy feed, which consisted of 96.67 g of corn silage, 54.08 g of alfalfa ground hay, 49.38 of soybean paste, 37.80 g of cottonseed, 124.27 g of rolled corn and 37.80 g of commercial mixture with vitamins and minerals (totaling 400g; 14.5 PC,80% DM). The diet was offered individually daily (before grazing) from day -5 to +15 of the study. All females were subject to the male effect (Day 0; 2/group) for 10 days. By transrectal ultrasonography (Aloka SSD-500; 7.5MHz) were determined: the proportions of females having ovulations (OF: day 8) and pregnant females (PF, day 45). All data were compared using a Chi-square test (IBM SPSS 25). Differences were observed (P< 0.05) for OF (SG:15/19;78.9% vs CG: 9/19; 47.3%), but not for PF (SG:10/19; 52.6% vs CG: 6/19; 31.5%). We conclude that the proportion of ovulating females was greater n SG than in CG, nevertheless, the PF was not different, possibly because the time in which the nutritional supplementation was offered did not influence the period of embryonic implantation, it would be interesting to do an experiment extending the period of nutritional supplement with leftover food.
Databáze: OpenAIRE
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