Root distribution of irrigated grapevine rootstocks in a coarse texture soil of the Sao Francisco Valley, Brazil.

BASSOI, L. H.; GRANGEIRO, L. C.; SILVA, J. A. M. e; SILVA, E. E. G. da

Root distribution of irrigated grapevine rootstocks in a coarse texture soil of the Sao Francisco Valley, Brazil.

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Descripción

An experiment was carried out to determine the root distribution of four grapevine rootstocks (Salt Creek, Dogridge, Courdec 1613, IAC 572) in a coarse texture soil of a commercial growing area in Petrolina Country, Sao Francisco Valley, Brazil. Rootstocks were grafted to a seedless table grape cv. Festival, and irrigated by microsprinkler. Roots were quantified by the trench wall method aided by digital image analysis. Results indicated that roots reached 1 m depth, but few differences among rootstocks were found. All of them presented at least 90% of the roots distributed until 0.6 m depth, with a greater root presence in the first 0.4 m. The upper 0.6 m can be taken into account as the effective rooting depth for soil and water management.