The objective of this study was to systematically evaluate and compare the effect of selected spices on methanogenesis using in vitro cultures. Some of the spices selected are Allium cepa, piper nigrum. Aframonum melegueta, Dennttia tripetala,, syzygium aromaticum, Gongronema latifolium among others were dried and milled for chemical analysis and in vitro gas fermentation study. The results showed that the organic matter was highest in Allium crispum (97.98%) and lowest in Allium cepa (96.77%) ash content ranges from 4.2% to 2.34% for Allium cepa and Allium crispum respectively. The crude protein (CP) also was found to vary from 24.50% in Allium cepa to 11.19% for Gongroneme latifolium. NDF values ranges from 52.00% for Capsicum annuum to 14.43% for Allium ascalonium and ADF values was 40.50% for Capsicun annuum to 4.25% for Allium crispum, also hemicelluloses was noticed to be highest in Allium crispum (39.00%) and lowest in Allium cepa(white) (2.75%).
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