| Summary: | Samples of poultry litter were collected in January-February 2009; 30 each from broiler and from broiler parent stock houses in the different parts of Thailand. The bedding material was rice hull. Both types of litter were pelleted as feed ingredient and nutritive values were analyzed. Results revealed that total ash (TA), crude protein (CP) and acid detergent fiber(ADF) contents for pelleted broiler litter (PBL) were much lower than those for pelleted broiler parent stock litter (PBPSL)(P<0.05), while dry matter (DM) was not significant (P>0.05). The range of values in both groups was very large. Mean copper contents were very similar for both PBL and PBPSL samples (P>0.05). Estimations of metabolizable energy (ME) werepredicted from rumen fluid-pepsin in vitro digestible organic matter content of the DM (ME-IV), and organic matter loss during 72h rumen incubation (ME-RI). ME-IV value for PBL and PBPSL was not significant (P>0.05), while the corresponding difference of ME-RI values was significant (P<0.05). The ranges within each of these means were large. ME contents were closely correlated with the sum of TA and ADF, the correlation coefficient for ME-IV was -0.870, and for ME-RI, -0.910. Useful estimations of ME of the litter samples could be made utilizing regression equations for either ME-IV or ME-RI,ME-RI being preferred for its slightly greater correlation coefficient, ME-RI (MJ/kg DM) = 12.7-0.0105 (TA + ADF) (g/kg DM).
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