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Laboratory analyses of the nutritional value of western queensland australia browse feeds



Laboratory analyses of the nutritional value of western queensland australia browse feeds



Australian Journal of Experimental Agriculture & Animal Husbandry 19(98): 344-349



Samples (70) of browse feeds collected during late autumn and spring of 1971 from 42 western Queensland [Australia] shrubs and trees, were subjected to laboratory analyses of the proximate fractions and in vitro digestibility. Crude protein, crude fiber and N free extract fractions ranged between 65-242, 55-353 and 425-711 g/kg dry matter, respectively. The in vitro dry matter digestibility coefficients ranged between 0.22 and 0.86. Comparisons of 15 browse feeds collected in April, May and Oct. indicated a higher crude protein content (P < 0.05) and in vitro digestibility (P < 0.01) and lower crude fiber (P < 0.01) and ash (P < 0.01) content in spring samples for most species. Browse feeds (9) of known in vivo [sheep] dry matter and organic matter digestibility were subjected to in vitro digestibility analysis. The in vitro and in vivo dry matter digestibilities were similar (0.43 and 0.45, respectively) and the mean in vitro organic matter digestibility was substantially lower than the corresponding in vivo digestibility (0.40 and 0.46, respectively).

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