Effect of compaction on the nutritional quality of corn silage
DOI:
https://doi.org/10.19136/era.a12n1.4113Keywords:
Non-fibrous carbohydrates, chemical composition, cell content, fodder, soluble crude proteinAbstract
Eight 4.05 L micro silos were prepared containing 2.35 to 3.54 kg of corn green fodder (GF) or 587 to 873 kg GF m-3 (182 to 271 kg DM m-3), compaction that was considered the independent variable. The following dependent variables were measured in the silage: moisture (Mst), ashes (Ash), ether extract (EE), crude protein (CP), neutral detergent insoluble crude protein (NDICP), soluble crude protein (SCP), neutral detergent fiber (NDF), acid detergent fiber (FDA), hemicelluloses (Hem), cellulose (Cell), lignin (Lig), silica (Sil), cell content (CC) and non-fibrous carbohydrates (NFC). Linear (L) and quadratic (Q) regression equations were obtained for the dependent variables as a function of compaction. The variables Mst (79.3 to 77.3%, L and Q), EE (5.2 to 1.8%, L and Q), CC (51.8 to 38.6%, Q) and SCP (8.8 to 7.6%, Q) decreased (P < 0.05) with increasing forage compaction, whereas CP (9. 2 to 10.6%, L), NDICP (1.5 to 3.1%, L), NDF (48.2 to 59.4%, Q), ADF (30.2 to 40.0%, Q) and Sil (0.9 to 2.7%, Q) increased (P < 0.05). The most soluble variables reached a maximum at 735 kg GF m-3, while the fibrous variables reached a minimum at this compaction. It is suggested to compact corn green fodder at 735 kg GF m-3 (equivalent to 227 kg DM m-3) to achieve the maximum values of soluble crude protein, ether extract and cell content, and the minimum values of fibrous components.
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