In vitro nutritional evaluation and methane production of deoiled ajwain meal as a potential ruminant feed ingredient
2018
Gautam, Mayank | Sehgal, J.P. | Mohini, Madhu | Gupta, Ritika | Varun, Tarun Kumar | Sarkar, Srobana
The present study was undertaken to evaluate deoiled ajwain (Trachyspermum ammi) meal (DOAM) for its in vitro nutritional evaluation and methane mitigation potential. For this purpose, a concentrate mixture based on maize and soybean meal as a major feed ingredient was formulated and designated as control ‘C’. The concentrate mixture was reformulated using 5, 10, 15 and 20 parts (kg/100kg) of DOAM for experimental groups i.e. T₁, T₂, T₁₃ and T₄, respectively and made iso-nitrogenous by addition of urea. The values of DM, CP, EE, CF, TA, NFE, NDICP and ADICP (%) in DOAM were 88.41, 14.57, 2.65, 16.35, 12.75, 53.68, 51.86 and 17.35, respectively. Dry matter degradability and digestibility of T₁ and T ₂ were comparable with those of control whereas significant (P<0.05) depression was observed when 15% (T₃) and 20% (T₄) of DOAM was incorporated. Addition of 10% DOAM in the concentrate mixture caused significant (P<0.05) decrease of methane production from 46.65 mg/g DM (control) to 39.70 ml/gm DM. It can be concluded from the present study that addition of 10% deoiled ajwain meal (DOAM) in the concentrate in concentrate mixture resulted in lower methane production and has no adverse effect on DM, OM and CP digestibility.
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