Combining cover cropping with deficit irrigation in a Mediterranean low vigor vineyard |
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| Authors: | Carlos M Lopes Tiago P Santos Ana Monteiro M Lucília Rodrigues Joaquim M Costa M Manuela Chaves |
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| Institution: | 1. Centro de Botânica Aplicada à Agricultura, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal;2. Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal |
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| Abstract: | The aim of this research was to test the effects of vineyard soil management practices combined with deficit irrigation strategies on the performance of the grapevine (Vitisvinifera L.) red variety Tempranillo. Two soil management practices (soil tillage – ST and permanent resident vegetation – RV) were combined with three deficit irrigation treatments (regulated deficit irrigation – RDI, partial rootzone drying – PRD and conventional sustained deficit irrigation – DI) during two growing cycles. Compared to ST, RV reduced soil water content during spring, inducing a significant reduction in vine vegetative growth, yield and must titratable acidity. The effects of irrigation treatments were not much pronounced. Only in the second season RDI showed a significant reduction on vine vegetative growth, yield and must titratable acidity as compared to PRD and DI whose results were similar to one another. |
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| Keywords: | ASW available soil water DI deficit irrigation DWU daily water use ETc crop evapotranspiration ET0 reference evapotranspiration ψpd predawn leaf water potential FTSW fraction of transpirable soil water PPFD incident photosynthetic photon flux density PRD partial rootzone drying RDI regulated deficit irrigation RV resident vegetation ST soil tillage SWD soil water depletion TTSW total transpirable soil water TWU total water use |
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