Efecto de la densidad de siembra en caracteres morfoproductivos de Jatropha curcas intercalada con cultivos alimenticios.

In order to determine the effect of planting density on the morpho-productive traits of Jatropha curcas intercropped with crops under rotation, the following treatments-systems (S) were studied in a completely randomized design: S1 (control): J. curcas at 2,5 x 2,0 m (2 000 plants/ha), S2: 50% of the area with J. curcas at 2,5 x 2,0 m and 50% of the area with crops under rotation (2 000 plants/ha), S3: J. curcas intercropped with crops at 5,0 x 2,0 m (1 000 plants/ha), S4 (control): crops under rotation. To interpret the results of plant height (H), number of primary branches (PB), stem diameter and primary branch diameter, quantity of racemes (NR) and fruit production (FP), a simple classification ANOVA was used and H, PB and NR were correlated; while descriptive statistics was used for the number of fruits per raceme (FR), weight and size of the seeds and crop yield. H and PB were higher for S1 and S2; nevertheless, higher NR was obtained with S3, and this last one did not differ regarding FP (p < 0,05) from the control (S1). There was high and positive correlation (r = 0,84) between H and PB, but they were not correlated with NR. In S3, the yield of the associated crops was 1,023; 4,281 and 0,320 t/ha for beans, sweet potato and sesame, respectively. It is concluded that when using 1 000 plants/ha in association systems, adequate yields and diversity of plant species can be obtained. [ABSTRACT FROM AUTHOR]