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- Title
FUNÇÃO DE PRODUÇÃO DO GIRASSOL SUBMETIDO A DIFERENTES LÂMINAS DE IRRIGAÇÃO.
- Authors
COIMBRA PELEGRINI, LAUREANA APARECIDA; PAIVA DE ARAÚJO, MÁRIO SÉRGIO; MARTINS GUIMARÃES, CLAUDINEI; FERNANDES DE SOUSA, ELIAS; FONSECA DE CARVALHO, DANIEL
- Abstract
The aim of this study was to evaluate the effects of different irrigation depths on the cultivation of two varieties of sunflower in Rio de Janeiro state's North region, making it possible to estimate the crop yield response factor (Ky). "Single Point" irrigation method was used, with a cannon sprinkler installed in the center of the planted area, dividing the wet area into four quadrants (blocks) and seven rings (treatmets) concentric to the sprinkler, with one of the rings (ring 3) used as a reference for irrigation management. Yield, plant height, leaf area, dry matter and drop in relative yields were evaluated. Statistical analysis was performed using linear and quadratic regression. The hybrids Helio 358 and Helio 251 showed a positive relationship with the irrigation depth, and the 200 and 316 mm depths are recommended for cultivation, respectively. Irrigation of sunflowers in the autumn-winter period of Rio de Janeiro state's North region, is essential for obtaining better yields, in view of the sensitivity to the water deficit presented by the crop (Ky = 1.2) and the low volume of rainfall normally expected at this time of year.
- Publication
Revista IRRIGA - Brazilian Journal of Irrigation & Drainage, 2020, Vol 25, Issue 2, p234
- ISSN
1413-7895
- Publication type
Article
- DOI
10.15809/irriga.2020v25n2p234-246