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Type: Artigo de periódico
Title: Effect Of Instalation Depth And Distance Of Drip Emitter On Coffee Leaf Water Potential In A Tropical Soil [efeito Da Profundidade E Espaçamento De Instalação De Gotejadores No Potencial Hídrico Das Folhas De Cafeeiro Em Solo Argiloso]
Author: Barreto C.V.G.
Sakai E.
Arruda F.B.
De Matos Pires R.C.
Da Silva E.A.
Abstract: The objective of this work was to evaluate the performance of different configurations of subsurface drip irrigation (SDI) by measuring coffee (Coffea arabica L.) leaf water potential. Six treatments of drip irrigation combining two drip emitters .spaced at 0.50 and 0.80 m, with three drip placement depths: 0 cm (soil surface), 0.10 m and 0.20 cm. The combined treatments were: T1 (50 - 0), T2 (50 - 10), T3 (50 - 20), T4 (80 - 0), T5 (80 - 10) and T6 (80 - 20). Leafwater potential was measured using a Scholander pressure pump at predawn and during the day. Both surface drip irrigation treatments showed a lower predawn leaf water potential. The treatment that presented better performance with higher water potential values was T2. Another fact observed was that treatments with wider spacing between emitters (T4, T5 and T6) always presentd higher water stress than other treatments, mainly in the period when irrigation was suppressed (June, 25th to September, 14th).
Rights: aberto
Identifier DOI: 
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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