ศักยภาพของการใช้โปรตีนก้อนเพื่อทดแทนอาหารข้นในโคนม | Potential of using protein block to replace concentrate feed in dairy cattle
2011
Jiraporn Odton | Choke Mikled | Nattaphon Chongkasikit
Study was conducted to evaluate the chemical composition of Protein Block (PB) I, II and concentrate. The result of chemical analysis were showed that the dry matter (DM) 94.54, 93.48 and 89.16 percent; crude protein (CP) 45.85, 41.41 and 15.41 percent; crude fiber (CF) 4.26, 1.90 and 3.36 percent; ash 25.38, 26.99 and 6.36 percent; and ether extract (EE) 8.58, 1.18 and 4.98 percent, respectively. Nutrients digestibility and energy contents were studied by gas production technique. The predication values of organic matter digestibility of protein block I, protein block II and concentrate residue were 84.56 ± 5.08, 75.41 ± 2.68 and 114.86 ± 0.89 percent, metabolizable energy (ME) 7.65 ± 1.30, 8.33 ± 1.61 and 9.89 ±1.19 MJ/kg and net energy for lactation (NEL) 4.18 ± 0.84, 4.68 ± 1.08 and 5.76 ± 0.73 MJ/kg, respectively. The average milk yield were 9.51 + 2.52 and 9.76 + 3.27 kilogram per day, respectively, which were not significantly different (P>0.05). The percentage of milk composition of Group 1 and Group 2 were fat 4.14 + 1.58, 3.98 + 0.59 percent; lactose 4.90 + 1.27, 4.66 + 0.90 percent; and total solid 13.52 + 2.83, 12.74 + 1.95 percent, which were not significantly different (P > 0.05). However, protein 3.71 + 1.16, 3.37 + 0.88 and solid not fat 9.37 + 0.32, 8.75 + 1.13 percent which were significantly different (P < 0.01).
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