« Previous Abstract"Diversity of opportunistic black fungi on babassu coconut shells, a rich source of esters and hydrocarbons"    Next AbstractImproving the Aromatic Profiles of Catarratto Wines: Impact of Metschnikowia pulcherrima and Glutathione-Rich Inactivated Yeasts »

Animal

Title:		"Effects of condensed tannin-amended cassava silage blend diets on feeding behavior, digestibility, nitrogen balance, milk yield and milk composition in dairy goats"
Author(s):		Nascimento TVC; Oliveira RL; Menezes DR; de Lucena ARF; Queiroz MAA; Lima A; Ribeiro RDX; Bezerra LR;
Address:		"Department of Veterinary Medicine and Animal Science, Federal University of Bahia, 500 Adhemar de Barros Avenue, 40170110 Salvador, Bahia, Brazil. Department of Veterinary Medicine and Animal Science, Federal University of Bahia, 500 Adhemar de Barros Avenue, 40170110 Salvador, Bahia, Brazil. Electronic address: ronaldooliveira@ufba.br. Department of Animal Science, Federal University of Sao Francisco Valley, 56300000 Petrolina, Pernambuco, Brazil. Department of Animal Science, Federal University of Campina Grande, Avenida Universitaria, s/n - Jatoba, 58708110 Patos, Paraiba, Brazil"
Journal Title:		Animal
Year:		2021
Volume:		20201210
Issue:		1
Page Number:		100015 -
DOI:		10.1016/j.animal.2020.100015
ISSN/ISBN:		1751-732X (Electronic) 1751-7311 (Linking)
Abstract:		"Condensed tannins (CTs) are phenolic compounds derived from secondary plant metabolism that act as part of the plant's chemical defense system against pathogen invasion and herbivorous attack. This study aimed to evaluate the intake, digestibility, nitrogen (N) balance, production and composition of milk from goats fed cassava silage with added levels of CTs. Eight Anglo-Nubian goats with a mean BW of 40?ª++/-?ª+2.0?ª+kg were distributed in a double Latin square design with four levels of CTs (0, 25, 50 and 75?ª+g/kg DM) with four 20-day periods with 15?ª+days of adaptation and five evaluation days for each period. No differences were observed in DM, NDF, CP intake and feed conversion (grams of DM intake (DMI) per gram of milk produced); however, when expressed as percent of BW, DMI showed a quadratic increase to 29.1?ª+g/kg. As the level of supplemented CTs increased in the diet, the CP digestibility (P?ª+=?ª+0.023), NDF (P?ª+=?ª+0.044), non-fiber carbohydrates (NFC; P?ª+=?ª+0.032) and total digestible nutrients (P?ª+=?ª+0.033) exhibited a linear decrease. Furthermore, the addition of CTs to cassava silage induced a linear increase in N-fecal excretion (P?ª+=?ª+0.014) and a positive quadratic effect on N-retained (P?ª+=?ª+0.014) and N-balance (P?ª+=?ª+0.024) as well as a positive quadratic trend in N-digested (P?ª+=?ª+0.092). Milk urea N (P?ª+=?ª+0.023) decreased linearly. The addition of CTs to cassava silage had a positive quadratic effect on ruminating time (P?ª+=?ª+0.011). In addition, comparing the use or non-use from the orthogonal contrast test, the inclusion of CTs in goat diet increased water and N-intake, CP and NDF digestibility, spent time eating and ruminating and N-balance and decreased milk production corrected(3.5%), fat milk content, milk urea N and dry defatted extract of milk. Thus, adding CTs to cassava silage at 25?ª+g/kg total DM promoted goats' greater use of the diet without impairing feed conversion and the quality of goat milk produced. Dietary levels of 50 and 75?ª+g/kg total DM are not recommended because under the conditions of this study, they reduced the productive efficiency of dairy goats"
Keywords:		Animals Diet/veterinary Digestion Feeding Behavior Female Goats Lactation *Manihot Milk Nitrogen *Proanthocyanidins Silage/analysis Zea mays Byproduct Manihot esculenta Milking Phenolic compound Ruminant;
Notes:		"MedlineNascimento, T V C Oliveira, R L Menezes, D R de Lucena, A R F Queiroz, M A A Lima, A G V O Ribeiro, R D X Bezerra, L R eng England 2021/01/31 Animal. 2021 Jan; 15(1):100015. doi: 10.1016/j.animal.2020.100015. Epub 2020 Dec 10"