Biometrical Ranking of Fodder Crops for Sustainable Livestock and Clean Air Production
Keywords:Maize index, biomass production, enteric methane, emission factor
AbstractThe study was conducted with the objectives to develop a professional forage quality ranking scale by considering their efficiency of biomass production (Xddm), animal production response (Xap), enteric methane emission reduction (XCH4) and benefit to cost ratio of their production (Xbc) in proportion to a typical fodder: maize, considering its constant efficiency of 1.0. Available fodder crops were cultivated following standard agronomical practices and conserved to develop database for calculating Xddm, and Xbc. Considering maize as a control roughage, a series of feeding trials on the native cattle of Bangladesh was conducted to calculate Xap andXCH4. The maize index (Mi) of a test fodder crop was calculated as: Mi =Â . The Mi of Moringafeed was found the highest (1.64), followed by Maize (1.00), Australian sweet jumbo (0.99) and Napier- Bajra (0.82). The German, Napier-Hybrid, Napier Arusha and Andropogon had the Mi of between 0.80 and 0.50 (0.72, 0.63, 0.57 and 0.50, respectively). Next, the Mi of Sugargraze jumbo, Splendida, UMS (Aus), and Para fall between 0.49 and 0.40 (0.45, 0.43, 0.42, 0.41 and 0.40, respectively). The least Mi (below 0.40) was found in UMS (Aman), local grass and Plicatulum (0.39, 0.35 and 0.35, respectively). The Mi of UMS (Aman), local grass and Plicatulum was below 0.40. The Mi may be used for the ranking of fodder crops for their cost effective production and feeding to animals and help reduction of enteric methane emission in the rumen.
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