Effect of concentrate supplementation on nutrient digestibility and growth of Brahman crossbred cattle fed a basal diet of grass and rice straw.

Autor: Quang do V; Institute of Animal Science Southern Vietnam, Ho Chi Minh, Vietnam., Ba NX; Faculty of Animal Sciences, Hue University of Agriculture and Forestry, Hue City, Vietnam., Doyle PT; Peter Doyle Consulting, 4 Red Bean Close, Byron Bay, NSW 2481 Australia., Hai DV; Institute of Animal Science Southern Vietnam, Ho Chi Minh, Vietnam., Lane PA; Tasmanian Institute of Agriculture and School of Land and Food, University of Tasmania, Sandy Bay, 7001 Australia., Malau-Aduli AE; Tasmanian Institute of Agriculture and School of Land and Food, University of Tasmania, Sandy Bay, 7001 Australia., Van NH; Faculty of Animal Sciences, Hue University of Agriculture and Forestry, Hue City, Vietnam., Parsons D; Tasmanian Institute of Agriculture and School of Land and Food, University of Tasmania, Sandy Bay, 7001 Australia.
Jazyk: angličtina
Zdroj: Journal of animal science and technology [J Anim Sci Technol] 2015 Sep 25; Vol. 57, pp. 35. Date of Electronic Publication: 2015 Sep 25 (Print Publication: 2015).
DOI: 10.1186/s40781-015-0068-y
Abstrakt: Background: An experiment was conducted in Vietnam to test the hypothesis that total dry matter (DM) intake and liveweight (LW) gain would increase in a curvilinear manner with increasing amounts of concentrate offered.
Method: There were five treatments: a basal diet of Guinea grass fed at 1 % of LW and rice straw fed ad libitum (T0), or this diet supplemented with concentrate at 0.6 (T1), 1.2 (T2), 1.8 (T3), or 2.4 % of LW (T4). The concentrate comprised locally available ingredients, namely cassava chips, rice bran, crushed rice grain, fishmeal, salt, and urea, mixed manually.
Results: Concentrate intake increased from T0 to T3, but there was no difference in concentrate intake between T3 and T4. Total feed intake increased in a curvilinear manner from 4.0 to 6.4 kg DM/d as the quantity of concentrate consumed increased. The substitution of concentrate for grass and rice straw increased with increasing consumption of concentrate and was as high as 0.49 kg DM reduction per kg of concentrate consumed. LW gain increased curvilinearly, with significant differences between T0 (0.092 kg/d), T1 (0.58 kg/d) and T2 (0.79 kg/d); but there were no significant differences in LW gain between T2, T3 (0.83 kg/d) and T4 (0.94 kg/d).With increasing amount of concentrate in the diet, the digestibilities of dry matter, organic matter, crude protein, and crude fat increased, but NDF digestibility decreased.
Conclusion: Based on these results, young Vietnamese Brahman-cross growing cattle will respond to a locally-sourced concentrate mix offered at a level of up to 1.2 % of LW.
Databáze: MEDLINE
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