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Abstract
In a study to evaluate some roughages and agricultural wastes and concentrates from Dakahlia Governorate, we came to the following conclusions:
Concerning the roughages and agricultural wastes studied here, there were variations in their chemical and cell-wall composition and in vitro digestibilities among them and among sampling locations. These variations were found too in mineral results. Generally, these forages are characterized by their low crude protein content, in vitro dry matter digestibility, low phosphorus, zinc and selenium and high ash, crude fibre, calcium and iron content.
Chemical analysis of the concentrates revealed variations among feeds and among sampling locations. These concentrates varied too in their mineral contents especially in calcium, sodium, iron and manganese. Sampling location affected also mineral contents. Generally, concentrates reflected low calcium and high phosphorus contents than required for ruminants.
Hence, the studied agricultural wastes could be used as novel feed ingredients in diet formulation for ruminants with improving their mineral contents by mixing with concentrates with correct mineral content and important ratios among different minerals in the whole diet as required by animals.