Resumen

DAVILA, Ciro; URBANO, Diannelis  y  CASTRO, Fernando. Effect of height and frequency of cutting on three perennial peanut (Arachis pintoi) varieties in Mérida state: II Morphological characteristics and seed production. Zootecnia Trop. [online]. 2011, vol.29, n.1, pp.7-15. ISSN 0798-7269.

In order to obtain the effect of the height and frequency of cutting on some morphological characteristics and seed production in perennial peanut a field trial was carried at the Borbollón farm, located in Jají, Mérida state, at 1950 m.o.s.l,. A randomized blocks design with three replications was used, with a factorial split-split plot treatment arrangement, in the main plot, three varieties (V1: 17434, V2:18744 and V3:18748) were randomized, in the secondary plots, two frequencies of cutting (F1:35 days and F2:49 days) and in the split-split plots three heights of cutting (H1:0 cm, H2:5 cm and H3:10 cm). In the two years of study, the leaf/stem ratio increased with the height of cutting, specially for the frequency of 35 days, whose average passed from 1,40 to 2,30 leaf/stem ratio; with 0 and 10 cm of the height, respectively, but for 49 days, it increased from 1,83 to 2,31. Foliar area increased with height of cutting with averages values of 7,70; 10,03 and 10,87 cm² for 0, 5 and 10 cm, respectively. The flowering increased from 55% when the height of cutting change from 10 to 5 cm and 182%, it pass from 5 cm to ground level, however accumulated production and number of seeds were similar for 0 and 5 cm, but it duplicated when the height was 10 cm (1459 kg/ha and 702.4 seed/m² ). Open flower number, production and seed number did not increased significantly with days of regrowth. The number of main roots decreased with the height of cutting at 49 days, but it increased with height, when peanut was cut at 35 days. As a conclusion height and the frequency of cutting influenced the morphological characteristics and seed production of perennial peanut.

Palabras clave : varieties of Arachis pintoi; height of cutting; frequency of cutting; morphological characteristics; seed production.