This study aimed to determine the effect of the energy / protein ratio of supplementary feed rations (RAS) on the production and characteristics of milk under natural hypobaric conditions (4300 m altitude in Puno, Peru). A total of 24 Brown Swiss cows in first and second third of lactation were distributed in three RAS with three ratios of metabolizable energy / protein (RAS1: 17.0 kcal/g; RAS2: 14.2 kcal/g; RAS3: 12.4 kcal/g) and as a protein source three levels of hydrolysed sheep and alpaca skins – Pioval-2® (0, 3 and 6%, respectively) and three levels of extruded whole soymeal (0, 10 and 25%, respectively). The cows were grazing on alfalfa associated with rye grass and supplemented with oat silage. Daily milk yield (DMY) was recorded for 45 days, as well as density (DE), total solids (TS), fat (FA) and milk urea nitrogen (MUN) at 0, 15, 30 and 45 days. The RAS did not affect the D...

This study aimed to determine the effect of the energy / protein ratio of supplementary feed rations (RAS) on the production and characteristics of milk under natural hypobaric conditions (4300 m altitude in Puno, Peru). A total of 24 Brown Swiss cows in first and second third of lactation were distributed in three RAS with three ratios of metabolizable energy / protein (RAS1: 17.0 kcal/g; RAS2: 14.2 kcal/g; RAS3: 12.4 kcal/g) and as a protein source three levels of hydrolysed sheep and alpaca skins – Pioval-2® (0, 3 and 6%, respectively) and three levels of extruded whole soymeal (0, 10 and 25%, respectively). The cows were grazing on alfalfa associated with rye grass and supplemented with oat silage. Daily milk yield (DMY) was recorded for 45 days, as well as density (DE), total solids (TS), fat (FA) and milk urea nitrogen (MUN) at 0, 15, 30 and 45 days. The RAS did not affect the D...

The aim of this study was to evaluate the effect of the agroecological zone on the textile characteristics of the alpaca fibre (Vicugna pacos) from herds of productive units of the dry Puna and wet Puna in the Puno region, according to sex and age. The samples were obtained from 5530 Huacaya alpacas. Fibre diameter (FD), Standard Deviation of Fibre Diameter (SDFD), Coefficient of Variation of Fibre Diameter (CVDF), Spin Fineness (SF), Curvature Index (ICur) and Standard Deviation of Curvature Index (SDICur) were recorded using the OFDA 2000 equipment. The effects of the agroecological zone in relation to sex and age (Deciduous teeth [DL], 2 teeth [2D], 4 teeth [4D] and all teeth [BLL]) were estimated using a randomized design with factorial arrangement and Duncan's multiple range test. The FF values are in the range of 13.3 to 34.5 μm with an average value of 20.32 μm. The alpacas from...

El objetivo del estudio fue evaluar el efecto de la zona agroecológica en las características textiles de la fibra de alpaca (Vicugna pacos), procedente de rebaños de unidades productivas de la Puna seca y Puna húmeda en la región Puno, según sexo y edad. Las muestras fueron obtenidas de 5530 alpacas Huacaya. El Diámetro de fibra (DF), Desviación estándar del diámetro de fibra (DEDF), Coeficiente de variación de diámetro de fibra (CVDF), Finura al hilado (FH), Índice de curvatura (IC) y Desviación estándar del índice de curvatura (DEIC) fueron registrados utilizando el equipo OFDA 2000. Los efectos de la zona agroecológica con relación al sexo y edad (Diente de leche [DL], 2 dientes [2D], 4 dientes [4D] y Boca llena [BLL]) se estimaron mediante un diseño al azar con arreglo factorial y prueba de rango múltiple de Duncan. Los valores de DF se encuentran en el rango de ...

El objetivo del estudio fue evaluar el efecto de la zona agroecológica en las características textiles de la fibra de alpaca (Vicugna pacos), procedente de rebaños de unidades productivas de la Puna seca y Puna húmeda en la región Puno, según sexo y edad. Las muestras fueron obtenidas de 5530 alpacas Huacaya. El Diámetro de fibra (DF), Desviación estándar del diámetro de fibra (DEDF), Coeficiente de variación de diámetro de fibra (CVDF), Finura al hilado (FH), Índice de curvatura (IC) y Desviación estándar del índice de curvatura (DEIC) fueron registrados utilizando el equipo OFDA 2000. Los efectos de la zona agroecológica con relación al sexo y edad (Diente de leche [DL], 2 dientes [2D], 4 dientes [4D] y Boca llena [BLL]) se estimaron mediante un diseño al azar con arreglo factorial y prueba de rango múltiple de Duncan. Los valores de DF se encuentran en el rango de ...