Variation in water use efficiency and δ13C levels in Eucalyptus grandis clones

Olbrich, B. W.; Roux, David M le; Poulter, A. G.; Bond, William J.; Stock, William D.

doi:10.1016/0022-1694(93)90128-v

Cited by 44 publications

(33 citation statements)

References 15 publications

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“…Os resultados foram expressos na forma de delta 13 C (%o) em relação ao padrão internacional PDB (Belemnitella Americana da formação Pee Dee). Essa análise possibilitou correlacionar a eficiência de uso de água, que está inversamente relacionada com a disponibilidade de água no solo, e o enriquecimento isotópico do tecido vegetal (OLBRICH et al, 1993). …”

Section: Crescimento Do Eucaliptounclassified

“…Foi observada maior discriminação do 13 C por plantas do terço inferior (PL), em comparação com as do terço superior (Figura 3), o que, segundo Olbrich et al (1993) e Farquhar e Richards (1984), é um indicativo de que as plantas nesse local da paisagem usam, de forma menos eficiente, a água do solo, ou seja, passam mais tempo com seus estômatos abertos e, assim, são capazes de discriminar mais esse isótopo.…”

Section: Balieiro Fc Et Alunclassified

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Fertilidade e carbono do solo e uso da água pelo eucalipto numa topossequencia em Seropédica, RJ

et al. 2008

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RESUMO -A variabilidade espacial de atributos físicos, químicos, biológicos ou pedogenéticos é citada como responsável por padrões encontrados na distribuição do C e nutrientes do solo. Numa toposseqüência típica da Baixada Fluminense (Planossolo Háplico -PL, Argissolo Amarelo -AA e Argissolos Vermelho-Amarelos -AV1 e AV2), buscou-se avaliar a influência da paisagem na distribuição de atributos químicos e no uso da água e o crescimento do Eucalyptus urophylla. Amostras de solo foram coletadas ao acaso em três locais da toposseqüência, para caracterização da sua fertilidade, enquanto outras foram retiradas de trincheiras nas profundidades de 0-10, 10-20, 20-40, 40-60 e 60-100 cm, para avaliação do estoque de C. A circunferência à altura do peito (CAP) e a altura (ALT) e análise isotópica do δ 13 C de tecido foliar de plantas em cada terço da paisagem foram também avaliadas como parâmetros de crescimento e de eficiência do uso da água. Embora a fertilidade do solo tenha se relacionado com o material parental local, o crescimento do eucalipto parece estar mais relacionado com a dinâmica de água na paisagem que com a maioria dos atributos químicos do solo, pois os maiores valores de CAP e ALT foram encontrados nos terços médio e inferior da toposseqüência, menos férteis. Os valores de δ 13 C de amostras foliares de eucaliptos dos terços superior e inferior fortalecem essa hipótese. Os estoques de C dos solos (4,75 kg m -2 para o PL, 4,63 kg m -2 para o AA, 2,93 kg m -2 para o AV2 e 2,60 kg m -2 para o AV1) se relacionaram com as diferenças na densidade do solo, conseqüência da própria mineralogia. Dessa forma, conclui-se que o relevo tem forte influência sobre os atributos químicos do solo, embora haja evidências de o crescimento do eucalipto se relacionar com a disponibilidade de água no solo.Palavras-chave: Matéria orgânica do solo, Eucalyptus urophylla e classes de drenagem. SOIL FERTILITY AND CARBON AND EUCALYPT WATER USE ON TOPOGRAPHY FEATURE IN SEROPÉDICA, RJABSTRACT -Spatial variability of soil attributes (physical, chemical, biological or pedogenic) -10; 10-20; 20-40; 40-60 and 60-100cm depths were collected in each portion. Circumference at breast height (CAP) and height

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Section: Crescimento Do Eucaliptounclassified

Section: Balieiro Fc Et Alunclassified

Fertilidade e carbono do solo e uso da água pelo eucalipto numa topossequencia em Seropédica, RJ

et al. 2008

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“…Being endemic to Australia, southeast Asia, and the Pacific, eucalypts are grown mainly as exotic species. Consequently, there is much concern about their water consumption, from many countries around the world [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…South Africa is a water-limited country with an average annual rainfall of 560 mm year −1 , which results in fierce competition for this limited resource [5]. Concerns over the effects of exotic plantations on South African streamflow and catchment water yields led to the establishment of a network of long-term paired catchment experiments in the major forestry areas of the country.…”

Section: Introductionmentioning

confidence: 99%

Eucalyptusand Water Use in South Africa

Albaugh

Dye

King

2013

International Journal of Forestry Research

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The Eucalyptus genus yields high rates of productivity and can be grown across a wide range of site types and climates for products such as pulp, fuelwood, or construction lumber. In addition, many eucalypts have the ability to coppice, making this genus an ideal candidate for use as a biofuel feedstock. However, the water use of Eucalyptus is a controversial issue, and the impacts of these fast-growing trees on water resources are well documented. Regardless, the demand for wood products and water continues to rise, providing a challenge to increase the productivity of forest plantations within water constraints. This is of particular relevance for water-limited countries such as South Africa which relies on exotic plantations to meet its timber needs. Research results from water use studies in South Africa are well documented and legislation restrictions limit further afforestation. This paper outlines techniques used to quantify the water use of eucalypt plantations and provides recommendations on where to focus future research efforts. Greater insights into the water use efficiency of clonal material are needed, as certain eucalypt clones show fast growth and low water use. To better understand water use efficiency, estimates should be combined with monitoring of stand canopy structure and measurements of physiological processes.

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“…The adaptation of species to the effects of climate can help in the management of water in different conditions of moisture, which is why the use of water reflects the complexity of factors involved in the interaction plant/environment. According to Olbrich et al (1993), the knowledge of the efficiency of water use would help the selection of the best species of Eucalyptus to certain conditions.…”

Section: Discussionmentioning

confidence: 99%

ECOPHYSIOLOGICAL BEHAVIOR OF Eucalyptus grandis x Eucalyptus urophylla, IGARATÁ, SP - BRAZIL

Tonello

Filho

2012

R_I

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This study aimed to characterize the effects of environmental variables on the transpiration (E), stomatal conductance (Gs) and photosynthesis (A) behavior of Eucalyptus grandis x Eucalyptus urophylla clone in the leaf scale over three consecutive days. The measurements were performed in a clonal population of 60 months of age, located in the municipality of Igaratá-SP. Measurements of predawn leaf water potential (Ψ pd ) by the Scholander pressure chamber and ecophysiological measurements of E, Gs and A were obtained by porometer LcPro + (ADC). Specific climate characteristics to the measurement days were obtained from the automatic weather station Campbell Scientific Inc. installed on the site of study, distant 100 m from the clonal settlement of interest. Environmental variables such as photosynthetically active radiation (Qleaf) and a pressure deficit of water vapor (VPD) were chosen to correlate with E, Gs and A. The best associations were observed between E, G, A with Qleaf not being significant for Gs and VPD. The ratio A / E was progressively increased with the decrease of Ψ pd . Knowledge of water use efficiency helps to select the best species of Eucalyptus to determine certain conditions. KEYWORDS PALAVRAS-CHAVE:relação planta-água, transpiração, eficiência do uso da água

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Variation in water use efficiency and δ13C levels in Eucalyptus grandis clones

Cited by 44 publications

References 15 publications

Fertilidade e carbono do solo e uso da água pelo eucalipto numa topossequencia em Seropédica, RJ

Fertilidade e carbono do solo e uso da água pelo eucalipto numa topossequencia em Seropédica, RJ

Eucalyptusand Water Use in South Africa

ECOPHYSIOLOGICAL BEHAVIOR OF Eucalyptus grandis x Eucalyptus urophylla, IGARATÁ, SP - BRAZIL

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