Respuesta de cultivos de maní a la inoculación con Bradyrhizobium sp.

DÍAZ-ZORITA, MARTÍN; BALIÑA, RAFAEL

Ciencia Del Suelo

Asociacion Argentina de la Ciencia del Suelo

Lugar: Buenos Aires; Año: 2004 vol. 22 p. 7 - 10

0326-3169

The variability in the grain yields of peanut (Arachis hypogaea L.) crops in sandy soils can be attributed to inadequate nitrogen nutrition beacasuse of a low soil N availability and a poor biological fixation from native rhizobium strains. Our objective was to determine the effects of in-furrow Bradyrhizobium sp. inoculation on nodulation and grain yields of 16 dryland peanut crops in sandy soils from the central and southern part of Córdoba province (Argentina). The study was performed during the 2001-02 and the 2002-03 production seasons on Entic Haplustolls and Typic Ustipsaments. The inoculation improved the number of nodules, both in vegetative and early reproductive growth stages and the leaf nitrogen content (estimated from Minolta SPAD 502) in early reproductive stages. The average grain yields response, independently of the studied season, was of 630 kg ha-1 and it increases when increasing the mean productivity of the experimental site. In-furrow inoculation with Bradyrhizobium sp. is a recommended practice for achieving high yielding peanut crops in sandy soils.