A comparison of processed sorghum grain using different digestion techniques
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Date
2016
Authors
González García, Ulises Alejandro
Corona, Luis
Castrejon Pineda, Francisco
Balcells Terés, Joaquim
Castelan Ortega, Octavio
González Ronquillo, Manuel
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Abstract
This study compares in situ, in vitro (DaisyII and gas production) and in vivo techniques to estimate the
degradation of dry matter (DM), organic matter (OM), and N of sorghum grain. We used whole dried
sorghum (WDS), dry cracked sorghum (DCS), the reconstituted whole sorghum silage (WSS) and
reconstituted cracked sorghum silage (CSS). The residues obtained from the ruminal digestion in vitro
(DaisyII) and in situ were analysed for their intestinal digestion (pepsin–pancreatin). OM was similar
(981.32 ± 0.52) in all treatments, WSS showed the highest (P < .001) crude protein (CP) concentration
compared with the other treatments, whereas CSS showed the highest amount of starch (P < .001)
compared to other treatments. The apparent degraded substrate (ADS) was higher (P < .038) for whole
sorghums, rumen degradable protein (RDP) was higher for WDS and WSS (P = .003), while protein
digestible in the intestine (PDI) was higher for sorghums silage (P < .001) compared with dry sorghums.
ADS was higher (P < .022) using the in sacco technique compared with the other methods, while for
the RDP and PDI methods in sacco and in vitro (Daisy) showed the better degradation compared with
in vivo. The reconstituted ensiling sorghum grains had a favourable response in the availability of
nutrients, compared with dried sorghums.
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Journal of Applied Animal Research, 2016, p. 1-9