2008
DOI: 10.1590/s0100-67622008000400006
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Respostas fisiológicas de diferentes clones de eucalipto sob diferentes regimes de irrigação

Abstract: 1RESUMO -O objetivo deste trabalho foi avaliar o desempenho de clones de Eucalyptus spp. em diferentes regimes hídricos, em casa de vegetação, visando subsidiar trabalhos de melhoramento quanto à tolerância ao estresse hídrico. O experimento foi conduzido por 73 dias, em delineamento em blocos casualizados, no esquema fatorial 18 x 4 (18 clones e quatro regimes de irrigação: diária e a cada dois, quatro e seis dias), com quatro repetições. Avaliou-se o incremento relativo em altura, diâmetro do coleto, número … Show more

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Cited by 33 publications
(31 citation statements)
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References 24 publications
(23 reference statements)
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“…Also, 48 hours after irrigation, a recovery was seen in the rate of photosynthesis in the five hybrids ( Figure 1A). Similar values for photosynthesis were observed in plants from 18 clones of Eucalyptus spp under daily irrigation and every two days, comparable to the recovery of this characteristic under the less frequent irrigation regimes (four and six days) after 24 h of irrigation (VELLINI et al, 2008). For Warren, Aranda and Cano (2011), the recovery rate for photosynthesis depends on the genotype and the degree of dehydration reached during stress.…”
Section: Resultssupporting
confidence: 75%
“…Also, 48 hours after irrigation, a recovery was seen in the rate of photosynthesis in the five hybrids ( Figure 1A). Similar values for photosynthesis were observed in plants from 18 clones of Eucalyptus spp under daily irrigation and every two days, comparable to the recovery of this characteristic under the less frequent irrigation regimes (four and six days) after 24 h of irrigation (VELLINI et al, 2008). For Warren, Aranda and Cano (2011), the recovery rate for photosynthesis depends on the genotype and the degree of dehydration reached during stress.…”
Section: Resultssupporting
confidence: 75%
“…Johnson e Ferrel (1983) observaram que a resposta dos estômatos ao DPV é reduzida em solos secos, comparados a solos úmidos. Vellini et al (2008) constataram redução da condutância estomática e da transpiração, em clones de eucalipto, com a redução da disponibilidade de água. Essa restrição da perda de água através do fechamento dos estômatos e o aumento da aquisição da água pelo sistema radicular são mecanismos importantes para a sobrevivência das plantas em situações de déficit hídrico (NGUGI et al, 2004 A relação linear entre a fotossíntese máxima e a produtividade dos clones (Figura 4) explica a maior produtividade da área úmida.…”
Section: Table 1 -Dhb Average High (H) Volume (V) and Maximum Photounclassified
“…For the evaluated periods 120 and 150 DAT, SD was higher with the micro sprinklers compared with the dryland, which, in turn, did not differ from the dripping system (Table 4). In VELLINI et al (2008) study, it was found that the height growth was proportionally less affected than the diameter growth when decrease the water availability for plants.…”
Section: Resultsmentioning
confidence: 97%
“…The eucalypt culture is planted by almost all the national territory, and in some situations have limitations to the development due to water stress in the soil (VELLINI et al, 2008). According to ALVES (2009), for several reasons, including its hardiness, high cost involved in the implementation of irrigation systems in the dimensions of planting areas, and also for being a traditionally rained culture, there is little information on the crop water requirements of eucalyptus.…”
Section: Introductionmentioning
confidence: 99%