<b>Evaluation <i>in situ</i> digestibility of alfalfa in different grinds and textiles

Abstract

ABSTRACT. Indigestible fractions of dry matter (iDM) and neutral detergent fiber (iNDF) in the feed of ruminants are mainly estimated by in situ incubation time with regard to particle size and textile types. Samples of alfafa, ground into three particle sizes, were analyzed. Samples, processed in a Willey mill with 1.0; 2.0 and 3.0 mm sieve pores, were conditioned in F57 (Ankon ) and polyester textile bags measuring 4 x 5 cm. Material was divided into 13 incubation periods and 8 replications, and incubated in the rumen of two multiparous cows adapted to a 70:30 diet, roughage:concentrate, respectively, for 288h. iDM and iNDF rates were evaluated sequentially for non-digested percentage and data underwent analysis of variance (ANOVA p < 0.05); means were compared by tukey's test (p < 0.05). Particle size and material employed for incubation affected iDM and iFDN at the initial periods of incubation (p < 0.05).Keywords: digestion, neutral detergent fiber, F57, nonwoven textile, polyester textile.Avaliação de digestibilidade in situ de alfafa em diferentes moagens e tecidos RESUMO. A determinação do tempo de incubação in situ, em relação ao tamanho de partículas e tipos de tecidos, é o aspecto principal sobre as estimativas das frações indigestíveis da matéria seca (MSi) e da fibra em detergente neutro (FDNi) em alimentos para ruminantes. Estudou-se amostra de alfafa, moídas em três tamanhos de partículas. As amostras foram processadas em moinho, com facas e porosidades das peneiras ajustadas a 1,0; 2,0 e 3,0 mm, as amostras foram acondicionadas em sacos F57 (Ankon ® ), tecido não tecido (100 g m -2 ) e tecido de poliéster, confeccionados na dimensão 4 x 5 cm. Os materiais foram divididos em 13 tempos de incubação e oito repetições, incubadas no rúmen de duas vacas multíparas adaptadas à dieta 70:30, volumoso:concentrado, respectivamente, por tempo total de 288h. Os teores de MSi e FDNi foram avaliados sequencialmente para interpretação das porcentagens de material não digerido, e os dados foram submetidos à análise de variância (ANOVA, p < 0,05), e as médias comparadas posteriormente pelo teste de tukey (p < 0,05). Houve efeito do tamanho de partículas e material utilizado para incubação sobre as estimativas de MSi e FDNi, nos tempos iniciais de incubação (p < 0,05).Palavras-chave: digestão, fibra em detergente neutro, F57, tecido não tecido, poliéster.

Impact of Leaf and Stem Proportions on Dry Matter and Crude Protein In Situ Disappearance of Rhizoma Peanut Genotypes

“…As CP disappearance was a response variable of major interest, the Ankom F57 bags with 25-mm pore size were used to avoid unwanted particle losses from the bag. The use of smaller pore sizes for different forage entities was previously reported by Krizsan and Huhtanen (2013) and Djouvinov et al (1998), and the use of F57 bags in in situ trials was validated by Kuwahara et al (2016) and Valente et al (2011). Samples were incubated for 0, 3, 6, 12, 24, 48, and 72 h (Vendramini et al, 2008).…”

Investigating the performance of polyester microfibers in situ bags using different weft yarn count and density

“…Adesogan (2005) observed an underestimation of in situdegradability due to the fine particles that pass through bags' pores. Kuwahara, Souza, Ferreira, Costa, and Meirelles (2016) reported significant differences in in situ DM degradability between samples of alfalfaground into three differentparticle size especially at the initial periods of incubation.…”

A Review of Kudzu’s Use and Characteristics as Potential Feedstock

“…In comparison, alfalfa is a high-quality forage characterized by high digestibility and swift ruminal degradation [37]. Alfalfa and kudzu leaf and stem have similar in situ rumen degradation, with alfalfa having an average rate of 73.35% and kudzu having 78% maximum degradability [20,38].…”