Energy and nitrogen balance in lactating cows fed diets containing dry or high moisture corn in either rolled or ground form

• Published in: Journal of dairy science Vol. 80; no. 10; pp. 2487 - 2496
• Main Authors: Wilkerson, V.A, Glenn, B.P, McLeod, K.R
• Format: Journal Article
• Language: English
• Published: Savoy, IL Am Dairy Sci Assoc 01.10.1997; American Dairy Science Association
• Subjects: AGE; Animal Feed; Animal productions; Animals; ASHES; BALANCE DE ENERGIA; BILAN ENERGETIQUE; Biological and medical sciences; BODY TEMPERATURE; BODY WEIGHT; CARBOHIDRATOS; CARBOHYDRATES; CARBON; CARBONE; CARBONO; Cattle - metabolism; CELLULOSE; CELULOSA; CENDRE; CENIZA; COMPOSICION APROXIMADA; COMPOSITION GLOBALE; CONTENIDO DE HUMEDAD; CONTENIDO DE LIPIDOS; CONTENIDO DE MATERIA SECA; CONTENIDO PROTEICO; CRUDE PROTEIN; DAIRY COWS; Dietary Carbohydrates - metabolism; Dietary Fiber - administration & dosage; DIETARY FIBRES; Dietary Proteins - metabolism; DIGESTIBILIDAD; DIGESTIBILITE; DIGESTIBILITY; Digestion; DRY MATTER CONTENT; EDAD; ENERGY BALANCE; Energy Metabolism; ENERGY VALUE; ETHER EXTRACTS; EXTRACTOS; EXTRACTS; EXTRAIT; FEED INTAKE; Female; FIBER CONTENT; FIBRA DE LA DIETA; FIBRE ALIMENTAIRE; Food Handling; FRECUENCIA CARDIACA; FREQUENCE CARDIAQUE; Fundamental and applied biological sciences. Psychology; GESTACION; GESTATION; GLUCIDE; GRASA DE LA LECHE; HEART RATE; HEMICELLULOSE; HEMICELULOSA; INGESTION DE PIENSOS; LACTACION; LACTATION; LACTATION STAGE; LIGNINAS; LIGNINE; LIGNINS; LIPID CONTENT; MAIS; MAIZ; MAIZE; MATIERE GRASSE DU LAIT; METABOLISME DE L'AZOTE; METABOLISMO DEL NITROGENO; MILK FAT; MILK PROTEIN; MILK YIELD; MOISTURE CONTENT; NITROGEN METABOLISM; PESO CORPORAL; POIDS CORPOREL; PREGNANCY; PRISE ALIMENTAIRE (ANIMAUX); PROTEIN CONTENT; PROTEINA BRUTA; PROTEINAS DE LA LECHE; PROTEINE BRUTE; PROTEINE DU LAIT; PROXIMATE COMPOSITION; RENDEMENT LAITIER; RENDIMIENTO LECHERO; SOLIDS NOT FAT; TEMPERATURA DEL CUERPO; TEMPERATURE CORPORELLE; TENEUR EN EAU; TENEUR EN LIPIDES; TENEUR EN MATIERE SECHE; TENEUR EN PROTEINES; Terrestrial animal productions; VACAS LECHERAS; VACHE LAITIERE; VALEUR ENERGETIQUE; VALOR ENERGETICO; Vertebrates; Water; Zea mays - chemistry; Flaked cereal; Farming animal; Animal feeding; Ruminant animal; Nutritive value; Dairy cattle; Grinding(comminution); Corn; Energy balance; Vertebrata; Mammalia; Nitrogen balance; Water content; Cereal; Female; Artiodactyla; Ungulata; Comparative study; Digestibility
• ISSN: 0022-0302; 1525-3198
• DOI: 10.3168/jds.s0022-0302(97)76201-5

The effects of harvesting and processing methods on the value of net energy for lactation of corn grain were investigated. Lactating Holstein cows were used in a replicated Latin square design with a 2 x 2 factorial arrangement of treatments. Treatments were different methods for the storage (dry or high moisture) and processing (rolled or ground) of corn grains. Alfalfa silage was the forage source in the diets. Indirect calorimetry was conducted using a 6-d nutrient balance protocol; respiration measurements were made at 24-h intervals. Dry matter intake did not differ among treatments and averaged 24.2 kg/d. Milk yield was 2.0 kg/d greater for cows fed diets containing high moisture corn than for cows fed diets containing dry corn and was 2.2 kg/d greater for cows fed diets containing ground corn than for cows fed diets containing rolled corn. Apparent digestibilities of nonfiber carbohydrates, crude protein, and dry matter were greater for cows fed diets containing high moisture corn than for cows fed diets containing dry corn. Metabolizable energy and heat production were greater for diets containing high moisture corn than for diets containing dry corn and were greater for diets containing ground corn than for diets containing rolled corn. Net energy for lactation was greater for diets containing high moisture corn than for diets containing dry corn (1.78 vs. 1.64 Mcal/kg of dry matter)