Biomass of Lupinus mutabilis sweet and its effect in the soil

Abstract

The aim of this research was quantify the biomass of Lupinus mutabilis Sweet through methods dendrometric and the contribution in macronutrients of biomass incorporated into soil as green manure. The field test, performed at the farm of the Faculty of Sciences Agriculture of the Technical University of Ambato, located in Querochaca, at an altitude of 2990 masl. Before incorporating, were randomly selected from 30 plants, of which data were taken of diameters, lengths and weights of stems and branches, was estimated biomass using formulas of volumetric, additionally we conducted chemical analysis of soil before planting and 45 days after incorporated the biomass to the soil. As a result, developed a multiple linear regression model to estimate the volume of biomass of this species, from know the height of the plant and the basal diameter of the stem. The soil analysis showed that the biomass of L. mutabilis Sweet increased organic matter in 490%, nitrogen at 500% and the phosphorus in 200%