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Supplementation of Cassava Hay to Replace Concentrate Use in Lactating Holstein Friesian Crossbreds

  • Wanapat, M. (Department of Animal Science, Faculty of Agriculture, Khon Kaen University) ;
  • Petlum, A. (Department of Animal Science, Faculty of Agriculture, Khon Kaen University) ;
  • Pimpa, O. (Department of Animal Science, Faculty of Agriculture, Khon Kaen University)
  • 투고 : 1999.06.21
  • 심사 : 1999.08.16
  • 발행 : 2000.05.01

초록

Exp. I, the study was conducted to examine the supplementation levels of cassava hay (CH) in dairy cows. Six multiparous Holstein-Friesian crossbreds were paired and randomly assigned in a change-over design to receive three levels of CH supplement at 0, 0.8 and 1.7 kg DM/hd/d. Concentrate was supplemented at the same level (1:2; concentrate:milk yield) while urea-treated (5%) rice straw was offered on ad libitum basis. The results revealed that supplementation of CH could significantly reduce concentrate use resulting in similar milk yield (12.5, 12.12 and 12.6 kg/hd/d) and significantly enhanced 3.5% FCM (14.21, 15.70, 14.9 kg/d, respectively). Moreover, CH supplementation significantly increased milk fat and milk protein percentages especially at 1.70 kg/hd/d. Concentrate use could be significantly reduced by 27% at 1.7 kg/hd/d CH supplementation. Exp. II, supplementation of cassava hay to replace concentrate use was studied in lactating-Holstein Friesian crossbreds grazed on Ruzi grass. Six multiparous cows in mid-lactating periods were paired and randomly assiged according to a change-over-design to receive three dietary treatments, $T_1=0kg$ cassava hay (CH) in 1:2 concentrate supplementation (CS) to milk yield (MY), $T_2=1.0kg$ DM CH/hd/d in 1:3 CS to MY, $T_3=1.7kg$ DM CH/hd/d in 1:4 CS to MY, respectively. The results were found that milk yield were similar among treatments while protein, lactose and solids-not-fat percentages were highest (p<0.05) in cows receiving CH at 1.0 kgjhd/d. Most significant improvement from CH supplementation was the ability to reduce concentrate use by 42% which could provide a higher income for small-holder dairy farmers. In addition, milk thiocyanate was enhanced from 5.3 to 17.8 ppm (p<0.05) in the control and in the CH supplemented group (1.7 kg/hd/d), respectively. Moreover, CH supplementation could significantly reduce concentrate level for diary feeding thus resulted in more economical return. Cassava hay demonstrated as a potential and high-quality on-farm feed resource especially for dry season feeding in the tropics.

키워드

Cassava Hay;Dairy Cattle;Milk Yield and Quality;Concentrate;Tannin-Protein;Milk Thiocyanate;Tropics

피인용 문헌

  1. Potential uses of local feed resources for ruminants vol.41, pp.7, 2009, https://doi.org/10.1007/s11250-008-9270-y
  2. Manipulation of ruminal fermentation and methane production by dietary saponins and tannins from mangosteen peel and soapberry fruit vol.63, pp.5, 2009, https://doi.org/10.1080/17450390903020406
  3. Chemical composition and in sacco degradability of four varieties of cassava leaves grown in Southwestern Nigeria in the rumen of sheep vol.42, pp.7, 2010, https://doi.org/10.1007/s11250-010-9596-0
  4. Chemical composition and nutritive value of four varieties of cassava leaves grown in South-Western Nigeria vol.95, pp.5, 2010, https://doi.org/10.1111/j.1439-0396.2010.01086.x