Evaluation of sweet sorghum lines for silage making
2003
Chaisang Phaikaew(Department of Livestock Development, Bangkok (Thailand). Division of Animal Nutrition. Forage Research Section) | Pimpaporn Pholsen(Department of Livestock Development, Bangkok (Thailand). Division of Animal Nutrition. Khon Kaen Animal Nutrition Research Center) | Boonchu Chompoosor(Department of Livestock Development, Bangkok (Thailand). Mukdaharn Livestock Provincial Office)
Three hybrid sweet sorghum lines from Japan viz. Hi-sugar, Big sugar and Sweet sorghum, and one Thai line, Suphanburi 1, were used in evaluation for silage making, at Khon Kaen animal Nutrition Research Center in 1995-1996. The result showed that the highest dry matter forage yields were obtained from sorghum cut at 75 days in all 4 lines. The dry matter forage yield of the three Japanese hybrid lines were similar and higher than yield of Suphanburi 1, with yields of, 1.2-1.6 ton/rai from cutting at 45 days age, 1.2-1.4 ton/rai from cutting at 60 days, and 2.2-2.5 ton/rai from cutting at 75 days. The dry matter yield of Suphanburi 1 were 0.8, 1.3 and 1.7 ton/rai from cutting at 45, 60 and 75 days, respectively. For silage quality, the sorghum silage made from the 75 days age cutting sorghum gave better quality silage than the other cutting ages, due to higher sugar from sweet stem juice and had lower pH silage. For silage nutritive value, the silage made from the 75 days age cutting sorghum had lower protein content (5.8-7.3 percent CP) than the cut at 45 days (7.2-10.7 percent CP). The digestibility of 75 days cut sorghum silage was found to be lower than the 45 days cut silage.
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