The effects of remedial fertilizer treatments on growth and pulp properties of<i>Eucalyptus grandis</i>stands established on infertile soils of the Zululand coastal plain

Toit, Ben du; Arbuthnot, Athol; Oscroft, D. G.; Job, R. A.

doi:10.1080/20702620.2001.10434129

Cited by 20 publications

(9 citation statements)

References 3 publications

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“…The manually weeded treatment with the longest fibres indicated a beneficial trait in terms of paper making. In two separate studies carried out on the influence of fertilizer on Eucalyptus growth and wood properties, no significant differences of fibre length were found between treatments [20,26].…”

Section: Fibre Length and Coarsenessmentioning

confidence: 85%

The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone

Little¹,

Staden

Clarke

2003

Ann. For. Sci.

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-When felled at 7 years of age, Eucalyptus grandis × camaldulensis trees from three vegetation management treatments (manually weeded treatment, 1.2 m row weeding treatment and a weedy control) were tested for selected wood and pulping properties in a trial in Zululand, South Africa. Weed control significantly improved merchantable volume of the manually weeded (230 m 3 ha −1 ) treatment over that of the 1.2 m row weeding (171 m 3 ha −1 ) or weedy control (138 m 3 ha −1 ). A significant increase in fibre length, density, extractable content and active alkali consumption was recorded with increased weed control. As no significant treatment differences were detected for screened pulp yield, differences in the pulp yield ha −1 could be attributed to differences in the merchantable volume, with a 22.6% and 40.8% increase in the pulp yield ha −1 for the manually weeded treatment in comparison to the 1.2 m row weeding treatment and the weedy control.vegetation management / eucalypt / wood properties / pulping properties Résumé -Relations entre gestion de la végétation et les propriétés du bois et de la pâte d'un clone hybride d'Eucalyptus. On a testé un certain nombre de propriétés du bois et de la pâte de sujets d'un hybride d'Eucalyptus grandis × camaldulensis soumis à trois traitements de la végétation concurrente (désherbage manuel, désherbage de bandes de 1,2 m, terrain enherbé) abattus à l'âge de 7 ans dans un essai situé dans le Zululand en Afrique du Sud. Le contrôle de la végétation a significativement amélioré la production de volume marchand dans le cas du désherbage manuel (230 m 3 ha −1 ) qui s'est révélé supérieur au désherbage en bande de 1,2 m (171 m 3 ha −1 ) et au témoin enherbé (138 m 3 ha −1 ). Le contrôle de la végétation s'est accompagné d'un accroissement significatif de la longueur des fibres, de la densité, du contenu de produits extractibles, et de la consommation d'alkali active. Aucune différence n'a pu être détectée entre traitements pour le rendement papetier, les différences de production de pâte à l'hectare résultent de celles de production de bois marchand ; ce qui donne un gain de production de pâte de 22,6 % et 40,8 % pour le traitement désherbage manuel, comparé au traitement désherbage en bande de 1,2 m et au témoin enherbé. gestion de la végétation / eucalyptus / propriétés du bois / propriétés de la pâte

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Section: Fibre Length and Coarsenessmentioning

confidence: 85%

The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone

Little¹,

Staden

Clarke

2003

Ann. For. Sci.

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“…More specifically, during the last half century, there has been substantial experimentation with fertilizers at time of establishment, which covered a wide range of species, site types and establishment conditions. Summaries of results from these empirical fertilizer trials on hardwood plantations have been documented by Schö nau et al (1981), Schö nau (1983, Herbert andSchö nau (1989, 1990), Noble and Herbert (1991), Herbert (1996), Carlson et al (2001), du Toit et al (2001, du Toit (2002), du Toit and Oscroft (2003), and du Toit and Drew (2003). Fertilization at establishment has the potential to substantially boost the productivity of shortrotation hardwood crops.…”

Section: Effects Of Harvest Residue Management and Fertilization On Smentioning

confidence: 95%

Intensive, site-specific silviculture: Manipulating resource availability at establishment for improved stand productivity. A review of South African research

Toit

Smith

Little

et al. 2010

Forest Ecology and Management

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“…The soil was classified as an arenosol. Arenosols are characteristically sandy textured and contain little organic matter and soils from the Zululand coastal plain typically fall into this category (du Toit et al 2001, Smith & du Toit 2005, Dovey et al 2014. The basic soil chemical properties of the soil at the experimental site are shown in Tab.…”

Section: Site Historymentioning

confidence: 99%

“…The Zululand coastal plain of South Africa has more than 50 000 ha of industrial plantation forests and many wood-burning processing plants. The coastal plain soils are sensitive to poor management practices, as demonstrated by the nutritional disorders that have been experienced with soils that have low organic matter in the topsoil (du Toit & Oscroft 2003), as well as old agricultural lands that had been intensively tilled and burnt (du Toit et al 2001). We explored the feasibility of disposing pure wood ash in an area where it is produced in large quantities on a plantation soil as an alternative disposal method.…”

Section: Introductionmentioning

confidence: 99%

Potential for utilization of wood ash on coastal arenosols with limited buffer capacity in KwaZulu-Natal and its effect on eucalypt stand nutrition and growth

Scheepers¹,

Toit²

2017

iForest

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A field trial was established to test the effects of various wood ash and fertilizer application rates on the nutrition and early growth of a clonal Eucalyptus grandis × urophylla stand near Richards Bay, KwaZulu-Natal province, South Africa. The trial consisted of wood ash treatments of 0, 0.3, 0.6 and 1.2 t ha -1 , combined with fertilizer treatments of no fertilizer (control), 150 g tree -1 of conventional ammonium sulphate fertilizer or 320 g tree -1 of controlled release fertilizer mixture containing N, P and a balanced suite of several plant nutrients. The experiment was conducted on a young sandy soil of aeolian origin with a very low buffer capacity. Ash application rates were chosen after a pilot study was conducted to test the effect of CaCO3 on the soil reaction. At 4 and 8 months after treatment, soil heavy metal concentrations for cadmium (Cd), mercury (Hg), chromium (Cr) and lead (Pb) levels were substantially lower than toxic levels. Foliar heavy metal concentrations (for the same elements) were less than 1mg kg -1 at both time intervals. The wood ash induced a temporary liming effect up to 8 months after application. Foliar nutrient assessments revealed sub-optimal nutrient concentrations for phosphorous (P), potassium (K) and zinc (Zn) at 4 months and K at 8 months of age. The positive growth responses (expressed as a biomass index) at 8 months, ranged between 13% and 683% relative to the untreated control. At 21 months, the growth response to ash and fertilizer combinations ranged from -0.5% to 50% relative to the control. This research demonstrated that 1.2 t ha -1 of wood ash can safely be disposed of on a typical, poorly buffered Zululand coastal sand with little environmental risk and minimal growth suppression, provided that it is balanced with an appropriate NPS plus trace element fertilizer mixture.

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The effects of remedial fertilizer treatments on growth and pulp properties ofEucalyptus grandisstands established on infertile soils of the Zululand coastal plain

Cited by 20 publications

References 3 publications

The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone

The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone

Intensive, site-specific silviculture: Manipulating resource availability at establishment for improved stand productivity. A review of South African research

Potential for utilization of wood ash on coastal arenosols with limited buffer capacity in KwaZulu-Natal and its effect on eucalypt stand nutrition and growth

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