Grapevine root distribution in drip and microsprinkler irrigation

By L. Bassoi, Jan W. Hopmans, Lucio Andre de Castro Jorge, C. M. Alencar, J. A. Silva. 2003

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ABSTRACT: Grape ( Vitis vinifera L.) yield and its quality are dependent of the status of the root system.Root distribution information is also valuable for soil and water management. An analysis of methods toevaluate the root distribution of grapevines for both, drip and microsprinkler irrigation in a Typic Acrustoxis presented for the table grape cv. Italia grafted on the rootstock IAC-313, in northeastern Brazil. Measuredroot parameters using the monolith method were root dry weight (D w ) and root length density (L v ), while rootarea (A p ) was estimated using the soil profile method in combination with digital image analysis. For bothirrigation systems, roots were present to the 1 m soil depth and extended laterally to 1 m distance from thetrunk, but grapevines irrigated by microsprinkler showed greater root presence as the distance from the trunkincreased. Values of A p were reasonably well correlated to D w and L v . However, correlation values werehigher when fractional root distribution was used. The soil profile method in combination with image analysistechniques, allows proper grapevine root distribution evaluation.Key words:

Subfields: Plant Science, Soil Science

View Paper: https://www.semanticscholar.org/paper/ac92cc32dc9975898d457fa540b61ca4a9dc7106