Resumo

ZAMBRANO B, Gema; APRAEZ G, José Edmundo  e  NAVIA E, Jorge Fernando. Relationship between soil properties and bromatological variables grasses in a dairy system of Nariño. Rev. Cienc. Agr. [online]. 2014, vol.31, n.2, pp.106-121. ISSN 0120-0135.  https://doi.org/10.22267/rcia.143101.46.

The research was conducted at high Andean regions of the department of Nariño with the aim of evaluating the physical and chemical properties of soil and its relation to biomass production and bromatological analyses of Lolium hybridum monoculture and pasture mixtures of Dactylis glomerata L., Holcus lannatus L. y Lolium sp. Soil indicators for monoculture at high, medium, and low areas showed differences between these, but no differences were observed between seasons (wetdry). The chemical properties were statistically different for the pasture mixtures. In regards to the physical properties, the soils showed a sandyloam texture with good stability. In monoculture, the bulk density (BD) per area showed differences, while the relative density (RD) and total porosity (TP) did not present differences. The results for the mixed pastures perarea showed no differences in all of the physical soil variables (RD, BD, and TP) between areas; however, differences in RD and TP were found between seasons (P< 0.05). In monoculture, differences in the recovery period (RP) and biomass production (PB) forboth seasons and areas were found. Nonetheless, in the pasture mixture, RP differed between seasons, but no differences were found per area. The bromatological analysis showed only differences between locations for monoculture as well as pasture mixtures, in regards to raw protein, neutral detergent fiber, acidic detergent fiber, calcium, phosphorus, magnesium, and total digestible nutrients. The positive relationships of these soil variables with production will allow a high relation between pasture recovery and animal wellbeing.

Palavras-chave : Coconutfiber; rice husks; A frame structure.

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