Abstract
Microfiber fabrics are more efficiency in retaining fine-particles that increase the variation in in situ degradability. The aim of this was to examine the performance of in situ bags made from different microfiber fabric for meeting the required specification and their ruminal degradability compared with standard Ankom in situ bags. Four fabrics were manufactured using polyester microfiber with 1.04 denier, weft yarn counts (150 and 300), weft density (22 and 28 picks / inch), plain 1/1 textile structure. Physical and mechanical properties of manufactured fabrics were measured before and after incubation. Ruminal degradability was measured for three feedstuffs (soybean meal, wheat bran and berseem hay) using three rumen-fistulated rams as a replicates after 24 and 48 hours. Fabric's pore size was significantly decreased as either yarn weft count or density increased. Yarn weft count had a significant effect on all fabric's properties. Air permeability was significantly decreased as fabric's weft yarn count increased. Sample (1) meet the specific requirements for in situ bags and showed the nearest degradability values to those observed using Ankom bags for all feedstuffs in most incubation times. Microfiberin situ bags could be used in in situ ruminal degradation trials to reduce the variation in results due to the present of the fine particles.
Highlights
In situ technique is one of the most important methods used for feed evaluation
Data show that, manufactured in situ bags had a wide range for fabric s pore size (30.0 – 72.7, μm)
Fabric's pore size was significantly affected by both yarn weft count and density (p < 0.001) with no significant interaction (p = 0.089)
Summary
In situ technique is one of the most important methods used for feed evaluation. It could provide useful information about the rate and extent of nutrient degradation inside the rumen, which enables the formulation of a synchronous least cost rations for better feed utilization (Bogoro, Kalla, & Gaiya, 2006; Khadem, Pahlavan, Afzalzadeh, & Rezaeian, 2007; Aboameret al., 2015; Aboameret al., 2017).Several works evaluated in situ bags made from different textile materials (Valente, Detmann, & Sampaio, 2015). In situ technique is one of the most important methods used for feed evaluation. It could provide useful information about the rate and extent of nutrient degradation inside the rumen, which enables the formulation of a synchronous least cost rations for better feed utilization (Bogoro, Kalla, & Gaiya, 2006; Khadem, Pahlavan, Afzalzadeh, & Rezaeian, 2007; Aboameret al., 2015; Aboameret al., 2017). A standard protocol has been introduced by the Nordic feed evaluation systemrecommended to use polyester bags with 38 μm of pore size (Saatifil PES 38/31, manufactured by Saatitech, Como, Italy). The most effect is the overestimation of feed degradability which was observed due to loss of undigested fine particles from bags pores (Mabjeesh et al, 2000; Wilman & Adesogan, 2000)
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