Evaluation of local energy sources inmilk production in a tropical silvopastoral system with Erythrina poeppigiana

An experiment was carried out to determine the effect of four local energy sources (sorghum grain, green banana, polished rice, and sugarcane molasses) fed to dairy cows on intake, milk production and composition, and economic viability in a silvopastoral system in Costa Rica (Turrialba). Twelve grazing cows (Jersey × Central American Milking Creole), with a mean live weight of 332 kg (SD 34), were supplemented with 0.5 kg of dry matter (DM)/100 kg/LW of Erythrina porppigiana fresh foliage daily. Experimental design was a replicated change-over 4 × 4 Latin Square. The pasture composition was 11 and 17 % of star grass (Cynodon niemfuensis), 32 and 28 % of ruzzi grass (Brachiaria rusisiensis), and 45 and 42 % of natural grasses (Axonopus compresus and Paspalum conjugatum) at initial and final times of the essay, respectively. The grass allowance was 30.14 DM/cow/day. Significant differences were found among treatments for variable milk fat content (P < 0.05). Sorghum presented the highest (41.2 g/kg milk) content of milk fat, followed by green banana (39.2 g/kg milk), polished rice (38.3 g/kg milk) and molasses (38.1 g/kg milk). Non-significant differences (P > 0.05) resulted for total milk production (sorghum 9.0 kg/cow/day; green banana 8.9 kg/cow/day; polished rice 8.8 kg/cow/day; molasses 8.6 kg/cow/day) and fat-corrected milk (FCM). The financial analysis showed that all treatments were economically viable; however, supplementation with green bananas and molasses were the most favorable due to the low costs incurred.

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Bibliographic Details
Main Authors: Jiménez Ferrer, Guillermo Doctor autor 7948, Mendoza Martínez, Germán autor, Soto Pinto, Lorena 1958- Doctora autora 5454, Alayón Gamboa, José Armando Doctor autor 2012
Format: Texto biblioteca
Subjects:Producción lechera, Leche baja en grasa, Sorgo en grano, Plátanos, Arroz, Bagazo de caña de azúcar, Erythrina poeppigiana, Análisis estadístico, Análisis económico, Sistemas silvopastoriles,
Online Access:http://www.ncbi.nlm.nih.gov/pubmed/25863954
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