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espanolEl objetivo de este trabajo fue estudiar el efecto de la densidad poblacional sobre el crecimiento y productividad de mani tipo Espanol y Virginia cultivados en Nuble, Chile. Con cada genotipo se establecio un ensayo de campo en diseno de bloques completos al azar con cuatro repeticiones, considerando cuatro densidades poblacionales entre 104 y 417 mil plantas ha-1. La unidad experimental (12 m2) contenia cuatro hileras espaciadas a 60 cm. La cosecha se realizo 152 dias despues de siembra (DDS). Entre los 73 y 152 DDS se determino area foliar, biomasa acumulada/organo, numero de organos por planta e indice de cosecha. A cosecha se extrajeron las plantas de 3,6 m2 y se determino peso seco de parte aerea, frutos y semillas. Para ambos genotipos el aumento de la densidad poblacional disminuyo significativamente el area foliar, numero de organos y biomasa acumulada por planta. La distribucion de biomasa en la planta no resulto afectada. Por unidad de superficie, mayores densidades implicaron mayor rendimiento de semilla (2.031 y 1.932 kg ha-1 para los genotipos Espanol y Virginia, respectivamente). Altas densidades poblacionales en mani tipo Espanol y Virginia disminuyen el crecimiento por planta, sin embargo, por unidad de superficie, incrementan significativamente la productividad EnglishThe aim of this study was to analyze the effect of population density on growth and productivity of Spanish and Virginia peanuts grown in Nuble, Chile. For each peanut genotype a field trial was established using a randomized complete block design with four replications. Four population densities between 104 and 417 thousand plants ha-1 were used. The experimental unit (12 m2) consisted of four rows spaced at 60 cm. The harvest took place 152 days after sowing (DAS). Between 73 and 152 DAS the leaf area, biomass accumulated per organ, number of organs per plant and harvest index were determined. At harvest, plants contained in 3.6 m2 of each plot were removed, and dry weight of aerial parts, fruits and seeds was determined. For both peanut genotypes, increasing population density decreased leaf area, number of organs and accumulated biomass per plant. The distribution of plant biomass was unaffected. Greater density produced higher seed yield per unit area (2,031 and 1,932 kg ha-1 for Spanish and Virginia genotypes, respectively). High population densities in Spanish and Virginia peanuts reduce individual plant growth, but increase productivity per unit area

Crecimiento y productividad de dos genotipos de maní (Arachis hypogaea L.) según densidad poblacional establecidos en Ñuble, Chile