Microalgae supplementation improves goat milk composition and fatty acid profile: a meta-analysis and meta-regression

Archives animal breeding/Archiv für Tierzucht, Journal Year: 2025, Volume and Issue: 68(1), P. 223 - 238

Published: March 26, 2025

Abstract. Recently, there has been an emphasis on research sustainable and environmentally friendly agricultural practices. Microalgae are a promising feed that is rich in essential nutrients, oriented toward their incorporation into ruminant diets. This study aimed to evaluate the inclusion of microalgae goat diets using meta-analysis methodology. The data were acquired from 17 peer-reviewed scientific papers. raw mean difference between treatment supplemented with control was evaluated random-effects model. Experimental characteristics such as animal breed, days milk, experimental duration, species, levels, concentrate used covariates meta-regression subgrouping analyses. supplementation did not affect dry matter intake (DMI, p=0.170) but significantly improved crude protein (CP, p<0.001) neutral detergent fiber (NDF, p=0.005). diet all digestibility parameters (p<0.01), improvement fermentation parameters, including ruminal pH (p=0.010) propionate (p<0.001). increased blood glucose levels (p<0.001) antioxidant activity (p>0.05). milk yield (p=0.480) lactose (p<0.001), fat improves fatty acid (FA) profile. goats had decreased C18:0 (p=0.001) C18:1 n-9 (p=0.028) C20:5 n-3 (p=0.027), C22:6 (DHA, p<0.001), polyunsaturated FA (PUFA, p=0.039), (p=0.006). Subgroup analysis showed level higher than 30 g per kg DM advisable obtain this total improvement. However, even moderate (15–30 DM) species Schizochytrium sp. Alpine–Greek crossbreed breed interesting results concerning DHA PUFA. In addition, could be nutritional approach enhance production quality.

Language: Английский

The Effects of a Small Dose of Tannin Supplementation on In Vitro Fermentation Characteristics of Different Forages

Animals, Journal Year: 2025, Volume and Issue: 15(9), P. 1269 - 1269

Published: April 29, 2025

Pastoral systems in New Zealand are under societal pressure due to their increasing negative environmental impact terms of greenhouse gas emissions. This study was conducted investigate the effects supplementing a mixture containing hydrolysable and condensed tannins on vitro fermentation characteristics production three different forages, Lolium perenne, Medicago sativa, Plantago lanceolata. Three runs 48 h were using ANKOM technique, with each pertaining particular forage or without (control) tannin. Tannins added fermentable substrate (i.e., forage) at level 0.3%. For run, rumen fluid collected from two fistulated Holstein Friesian × Jersey cows. The RF modules used monitor temperature every 5 min. At end pH measured, vials taken for methane (CH4) measurements liquor samples measure volatile fatty acids (VFA) NH3 concentrations. addition reduced fractional rate alfalfa (p ≤ 0.04) but increased it ryegrass plantain. There tendency when = 0.10). also CH4 reduce < 0.10) N2O increase added. Iso-butyrate tended be lower control than 0.08). Valerate concentration plantain tannins. No detected composition > 0.05) VFA concentrations fermenting alfalfa. Under condition this study, these results may suggest that low-level tannin diet affect rumen-fermentation pattern potential reduction perenne-based diets. Further research is required effect low levels supplementation ex vivo conditions as might substrate-dependent.

Language: Английский

Forage Turnip (Brassica rapa L.) as a Dietary Supplement to Improve Meat Quality

Animals, Journal Year: 2025, Volume and Issue: 15(9), P. 1277 - 1277

Published: April 30, 2025

Summer turnips (Brassica rapa L.) have become one of the main supplementary crops in ruminant livestock systems southern Chile because accelerated forage growth as well greater yield and nutritive value dry season. This study investigated effects turnip supplementation on physicochemical sensory quality beef from steers. Twenty-seven Holstein–Friesian steers were allocated to three dietary treatments: pasture plus concentrate (Control), 50% with a basal diet hay rolled corn (T50), 70% same (T70). Carcass yields attributes, including fatty acid composition intramuscular fat (IMF) lean tissue, measured. Compared Control diet, finishing or increased meat redness (a* > 25.9 vs. 22.9 Control), IMF (1.79% T50 1.12% polyunsaturated acids (PUFAs) (especially n-3), cholesterol, specific minerals (sodium, manganese iron); this resulted reduction subcutaneous thickness (0.29 cm T50, 0.25 T70 0.51 Control) shear force cooked (p < 0.05). However, no differences found between diets juiciness, flavor, tenderness assessed by trained panelists Increasing inclusion similar level. Foraged present promising strategy for producing high-quality during periods limited growth.

Language: Английский