Depth distribution of roots of Eucalyptus dunnii and Corymbia citriodora subsp. variegata in different soil conditions

Grant, John C.; Nichols, J. Doland; Yao, Rui Ling; Smith, Ben; Brennan, Paul; Vanclay, Jerome K.

doi:10.1016/j.foreco.2011.12.033

Cited by 33 publications

(20 citation statements)

References 25 publications

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“…Similar results have been reported in other studies elsewhere (Bertomeu, 2012;Kidanu et al, 2005;Okorio et al, 1994). Root concentration of eucalypts is reported to be highest in the upper soil layers and this would be expected to explain the observed species' severe competition for soil moisture (Grant et al, 2012). However, Radersma and Ong (2004) indicate that there is a lack of a clear relation between root length density and water extraction near Grevillea robusta tree lines and conclude that the competition can be explained by a decrease in water-potential gradient between root and soil at increasing distance from the tree base.…”

Section: Discussionsupporting

confidence: 90%

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

Mugunga

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Section: Discussionsupporting

confidence: 90%

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

Mugunga

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“…A classe de solo também influencia a produção de raízes finas de Eucalyptus dunnii, que é menor em solos argilosos e maior em solos distróficos e de textura mais arenosa (GRANT et al, 2012), características estas que são intrínsecas ao tipo de solo na área de estudo. Nos solos distróficos e bem drenados, a intensa produção de raízes finas é uma das estratégias de plasticidade morfológica que otimizam a absorção de água e nutrientes (TAIZ e ZEIGER, 2013).…”

Section: Resultsunclassified

“…As raízes finas do eucalipto que é plantado em solos de baixa fertilidade se desenvolvem mais à superfície, sendo que, diversos fatores afetam o crescimento radicular (MACEDO et al, 2014). A dinâmica de distribuição das raízes finas varia de acordo com a taxa de crescimento das espécies (WITSCHORECK et al, 2003), classe de solo (GRANT et al, 2012), idade do povoamento (LAMBAIS et al, 2017), aplicação de calagem (BAKKER, 1999), no entanto é pouco influenciada pela adição de fertilizante nitrogenado (JOURDAN et al, 2008) e material genético (PINHEIRO et al, 2016). Interessante destacar que, quanto maior é a área de superfície específica das raízes finas, maior é o incremento de biomassa acima do solo em povoamentos florestais (MARTINS et al, 1997).…”

Section: Introductionunclassified

Raízes finas em árvores jovens de <em>Eucalyptus dunnii</em> Maiden

Dick¹,

Schumacher²

2019

Ecol. Nutr. Flor.

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As raízes finas proporcionam o cultivo do eucalipto nas mais diversas condições edáficas, contribuindo à ciclagem de nutrientes e melhoria da fertilidade do solo. O presente estudo teve o objetivo de caracterizar a produção de biomassa e distribuição das raízes finas (≤ 2 mm) em árvores jovens de Eucalyptus dunnii Maiden, cultivadas no bioma Pampa, Rio Grande do Sul. Aos 16 meses após o plantio foram coletados nove monólitos, divididos em 0 a 5, 5 a 10, 10 a 15 e 15 a 20 cm de profundidade do solo. A produção total de raízes finas é de 727,4 kg ha-1 e a biomassa radicular não difere entre as profundidades. A densidade das raízes finas varia de 0,31 a 0,39 g dm-3, reduzindo sutilmente após os 15 cm do perfil de solo. Esta distribuição radicular homogênea indica que fertilização mineral pode ser incorporada em até 20 cm de profundidade e, em curto prazo, por meio do turnover, estas raízes finas serão decompostas e adicionadas à matéria orgânica, proporcionando melhorias na fertilidade do solo.

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“…Aside from root length, root surface area is a parameter that also helps understand the soil-plant relation (Grant et al, 2012). This measurement is associated with the root diameter; thinner roots contribute to higher surface area values and form the exchange site between plant and soil for water and nutrient absorption (Waisel & Eshel, 2002).…”

Section: Introductionmentioning

confidence: 99%

Public-domain software for root image analysis

Costa

Cunha

Jorge

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYIn the search for high efficiency in root studies, computational systems have been developed to analyze digital images. ImageJ and Safira are public-domain systems that may be used for image analysis of washed roots. However, differences in root properties measured using ImageJ and Safira are supposed. This study compared values of root length and surface area obtained with public-domain systems with values obtained by a reference method. Root samples were collected in a banana plantation in an area of a shallower Typic Carbonatic Haplic Cambisol (CXk), and an area of a deeper Typic Haplic Ta Eutrophic Cambisol (CXve), at six depths in five replications. Root images were digitized and the systems ImageJ and Safira used to determine root length and surface area. The line-intersect method modified by Tennant was used as reference; values of root length and surface area measured with the different systems were analyzed by Pearson's correlation coefficient and compared by the confidence interval and t-test. Both systems ImageJ and Safira had positive correlation coefficients with the reference method for root length and surface area data in CXk and CXve. The correlation coefficient ranged from 0.54 to 0.80, with lowest value observed for ImageJ in the measurement of surface area of roots sampled in CXve. The IC (95 %) revealed that root length measurements with Safira did not differ from that with the reference method in CXk (-77.3 to 244.0 mm). Regarding surface area measurements, Safira did not differ from the reference method for samples collected in CXk (-530.6 to 565.8 mm 2 ) as well as in CXve (-4231 to 612.1 mm 2 ). However, measurements with ImageJ were different from those obtained by the reference method, underestimating length and surface area in samples collected in CXk and CXve. Both ImageJ and Safira allow an identification of increases or decreases in root length and surface area. However, Safira results for root length and surface area are closer to the results obtained with the reference method.Index terms: root length, root surface area, image processing, root system.

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Depth distribution of roots of Eucalyptus dunnii and Corymbia citriodora subsp. variegata in different soil conditions

Cited by 33 publications

References 25 publications

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

Raízes finas em árvores jovens de <em>Eucalyptus dunnii</em> Maiden

Public-domain software for root image analysis

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