Effects of initial cutting and subsequent cutting on yields and chemical compositions of cassava hay and its supplementation on lactating dairy cows
2002
Nguyen, T.T. H.(Khon Kaen University, Khon Kaen (Thailand). Faculty of Agriculture. Department of Animal Science) | Wanapat, M.(Khon Kaen University, Khon Kaen (Thailand). Faculty of Agriculture. Department of Animal Science) | Wachirapakorn, C.(Khon Kaen University, Khon Kaen (Thailand). Faculty of Agriculture. Department of Animal Science) | Pakdee, P.(Khon Kaen University, Khon Kaen (Thailand). Faculty of Agriculture. Department of Animal Science)
Exp. 1, a 2*2 factorial arrangement in a Randomized complete block design with 4 replications was carried out to determine the effects of different initial (IC) and subsequent cutting (SC) on yields and compositions of cassava plant. The results revealed that cassava could produce from 4 to 7 ton of DM and 1.2 to 1.6 ton of CP for the first six months after planting. CP content in cassava plant ranged from 20.8 to 28.5 percent and was affected by different SC. Condensed tannin ranged from 4.9 to 5.5 percent. At 2 months of IC and 2 months of SC was the optimal cutting to obtain high DM and CP yield as well as good cassava hay. Exp. 2, five crossbred (50 percent, 75 percent HF) cows in mild lactation with live-weight of 505+-6.1 kg and average milk yield of 10.78+-1.3 kg/d was randomly assigned in a 2*2 Factorial arrangement in a 5*5 Latin square design to study the effects of 2 levels of CH (1 and 2 kg/h/d) and concentrate (1 to 2 kg of milk and 1 to 3 kg of milk) on milk yield and milk compositions. The results showed that cassava hay increased NH3-N and MUN (P LT 0.05). Cassava hay tended to increase milk production and 4 percent FCM. Milk protein increased in cows fed cassava hay (P LT 0.05). Cassava hay can be a good source of forage to reduce concentrate supplementation and improve milk quality especially in the dry season.
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