Influence of different levels of dried citrus pulp on <i>in vitro</i> ruminal fermentation kinetics of total mixed ration in goat rumen inocula

Abstract

Inclusion of dried citrus pulp (DCP) at different levels: 0 (control), 10% (DCP10), 20 (DCP20), and 30% (DCP30) of the total mixed ration (TMR) was evaluated by in vitro gas production (GP), and ruminal fermentation patterns, in a completely randomized design. Rumen fluid was collected before the morning meal from 8 gestating goats (Boer×Saanen, body weight 3±2.3 kg). GP was recorded at 2, 4, 6, 8, 10, 12, 24, 48, 72, and 96 h of incubation. Ruminal fermentation parameters such as 96 h partitioning factor (PF 96 ), in vitro organic matter digestibility (IVOMD), metabolizable energy (ME), short-chain fatty acids (SCFA), and metabolizable energy (ME) were also estimated. Inclusion of DCP linearly increased (P<0.01) cumulative gas production at 24, 48, and 96 h after inoculation, as well as asymptotic gas production (b). Rations at 30% and 10% DCP had the highest values of gas production, whereas control and 20% DCP presented the same values (quadratic effect P<0.01). Lag phase (L) decreased linearly (P<0.001) with DCP addition. IVDMD and IVOMD 7 Corresponding author: e-mail: asalem70@yahoo.com Journal of Animal and Feed Sciences, 21, 2012, 458-467 459 HERNÁNDEZ J. ET AL.increased linearly (P<0.01) with the inclusion of DCP in rations. The ration at 30% DCP (DCP30) had the greatest value of ME and SCFA, but no differences were observed in the PF 96 among treatments. The data suggest that the DCP30 ration had the best impact on rumen gas production and IVDMD, IVOMD, ME, and SCFA.

Effect of dietary inclusion of dried citrus pulp on growth performance, carcass characteristics, blood metabolites and hepatic antioxidant status of rabbits

“…In the study of Hon et al (2009), no difference was found in growth performance after 20% dried sweet orange (Citrus sinensis) pulp meal was added in rabbit feeds. Moreover, fermentation of structural carbohydrates in citrus pulp can benefit the animal (Hernández et al 2012). Information related to the effects of dietary citrus pulp on the performance, blood metabolites and antioxidant status of growing rabbits is limited.…”

<i>In vitro gas</i> production and degradation kinetics of elephant grass silage with dried tamarind residue

“…The reduction of is favoured by the presence of readily fermentable substrates, and physical and chemical characteristics of the cell wall to facilitate microbial colonization (Tomich et al, 2003). Hernández et al (2012) also observed a linear decrease in as they increased the levels of dried citrus pulp (0, 10, 20 and 30%) in a total mixed ration for goats.…”

Effects of Replacing Extruded Maize by Dried Citrus Pulp in a Mixed Diet on Ruminal Fermentation, Methane Production, and Microbial Populations in Rusitec Fermenters

“…Due to the great content of highly-degradable NDF and readily fermentable carbohydrates, DCP has a high nutritional value and it has been proposed as a possible substitute of cereals in ruminant diets [ 10 , 11 ]. Several in vitro [ 12 , 13 , 14 ] and in vivo [ 15 , 16 , 17 ] studies evaluated the inclusion of DCP in the diet of small ruminants, mainly in sheep. These studies showed that replacing barley or other cereals by DCP can increase rumen pH [ 18 , 19 ], fiber digestibility [ 15 , 20 ], and acetate proportion [ 10 , 21 , 22 ], with no effects on either total volatile fatty acid (VFA) production [ 10 , 21 ] or microbial protein synthesis (MPS) [ 21 ].…”