The aim in this study was to determine the chemical composition, digestibility, and methane production of Echinochloa polystachya (Kunth) Hitch in periods with different rainfall in the Peruvian rainforest region. The pasture was managed under a rotational grazing system. The nutritive quality and in vitro CH4 production of the pasture during both experimental periods was determined from a sample obtained by zigzag technique and sampling points using the method of destructive systematic sampling. Echinochloa polystachya in the period of lower than higher rainfall had a higher content of neutral detergent fiber (NDF) (p < 0.001) and acid detergent fiber (ADF) (p < 0.001). Organic material (OM) was higher in the period of greater rainfall (p < 0.001); however, the crude protein (PC) content (p = 0.11), in vitro digestibility of OM (p = 0.89), corrected net gas production (p = 0.83...

The aim in this study was to determine the chemical composition, digestibility, and methane production of Echinochloa polystachya (Kunth) Hitch in periods with different rainfall in the Peruvian rainforest region. The pasture was managed under a rotational grazing system. The nutritive quality and in vitro CH4 production of the pasture during both experimental periods was determined from a sample obtained by zigzag technique and sampling points using the method of destructive systematic sampling. Echinochloa polystachya in the period of lower than higher rainfall had a higher content of neutral detergent fiber (NDF) (p < 0.001) and acid detergent fiber (ADF) (p < 0.001). Organic material (OM) was higher in the period of greater rainfall (p < 0.001); however, the crude protein (PC) content (p = 0.11), in vitro digestibility of OM (p = 0.89), corrected net gas production (p = 0.83...

Universidad Nacional Agraria La Molina. Escuela de Posgrado. Doctorado en Nutrición

The objective of this research was to evaluate the optimum density in the rearing of guinea pigs of the Peru breed in the growth phase, under humid tropical conditions. We used 200 guinea pigs (100 males and 100 females) weaned from the Peru breed at 30 days of age, distributed in a DBCA with 5 treatments (density = 8, 9, 10, 11 and 12 animals/0.96m2) and 4 replications, being sex the blocking effect, the significant difference between treatments was performed with Duncan's test (5%), in addition, the linear regression test was performed to determine the optimum density. In the zootechnical parameters, significant differences were observed (P<0.05); obtaining for weight gain, feed consumption and feed conversion the best result was evidenced in treatment T5 (D12) with 9.05g, 54.11g, 6.03 respectively. It was concluded that the best density for raising guinea pigs of the Peru breed in ...