QUALITATIVE CHARACTERISTICS, MICROBIAL POPULATIONS AND NUTRITIVE VALUES OF ORANGE PULP ENSILED WITH NITROGEN SUPPLEMENTATION
2014
LASHKARI S. | TAGHIZADEH A. | SEIFDAVATI J. | SALEM A. Z. M.
The aim of this study was to evaluate the qualitative characteristics, microbial profile and nutritive value of high-moisture orange pulp co-ensiled with poultry by-product meal (PBM) or urea as additional nitrogen (N) source. The optimum dry matter (DM) content of each experimental silage was achieved by adding the appropriate proportion of wheat straw. A control silage was also prepared with orange pulp and wheat straw, but without any supplemental nitrogen. Each experimental silage was ensiled in three replicates of 12 kg mini-silos and left intact for 90 days. The evaluated traits were: silage pH, microbial population, lactate, acetate, butyrate, crude protein (CP), true protein and NH3-N contents.In addition to these,in situ dry matter and CP degradability as well as ruminal and post-ruminal CP disappearance rates were also measured. Both N-supplemented silages showed higher pH values and CP contents compared to the control silage (P
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