Acceso usuarios
[1]
;
Sergio Iban Mendoza-Pedroza
[2]
;
Valeria Vázquez-Meraz
[2]
;
Ma. Magdalena Crosby-Galván
[2]
;
José Melquiades Monzón-Armenta
[1]
México
México
Se prepararon ocho micro silos de 4.05 L conteniendo de 2.35 a 3.54 kg de forraje verde (FV) de maíz o 587 a 873 kg FV m-3(182 a 271 kg MS m-3), compactación que fue considerada la variable independiente. En el ensilado se midieron las siguientes variables dependientes: humedad (Hum), cenizas (Cen), extracto etéreo (EE), proteína cruda (PC), proteína cruda insoluble en detergente neutro (PCIDN), proteína cruda soluble (PCS), fibra detergente neutro (FDN), fibra detergente ácido (FDA), hemicelulosas (Hem), celulosa (Cel), lignina (Lig), sílice (Síl), contenido celular (CC) y carbohidratos no fibrosos (CNF). Se obtuvieron ecuaciones de regresión lineales (L) y cuadráticas (C) de las variables dependientes en función de la compactación. Las variables Hum (79.3 a 77.3%, L y C), EE (5.2 a 1.8%, L y C), CC (51.8 a 38.6%, C) y PCS (8.8 a 7.6%, C) disminuyeron (P < 0,05) al aumentar la compactación del forraje, mientras que PC (9.2 a 10.6%, L), PCIDN (1.5 a 3.1%, L), FDN (48.2 a 59.4%, C), FDA (30.2 a 40.0%, C) y Síl (0.9 a 2.7%, C) aumentaron (P < 0.05). Las variables de mayor solubilidad alcanzaron un máximo a 735 kg FV m-3, contrariamente, las variables fibrosas, alcanzaron un mínimo a dicha compactación. Se sugiere compactar el forraje de maíz a 735 kg FV m-3(equivalente a 227 kg MS m-3) para lograr ensilados con valores máximos de proteína cruda soluble, extracto etéreo y contenido celular, y con valores mínimos de componentes fibrosos.
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 crudeprotein (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.
