Growth, biomass yield and biomass functions for plantation-grown Nauclea diderrichii (de wild) in the humid tropical rainforest zone of south-western Nigeria

Onyekwelu, Jonathan C.

doi:10.1016/j.biortech.2006.09.023

Cited by 25 publications

(29 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this case, Nauclea diderrichii is the preferred indigenous species (unpubl. data, Onyekwelu, 2007), next to exotic species as teak, Eucalyptus spp. and Acacia spp.…”

Section: Discussionmentioning

confidence: 99%

“…Unfortunately, most models on AGB are limited in use because of a small diameter range (diameter at breast height, DBH) and a limited number of sample trees. Moreover, they are often based on young plantations (Forrester et al, 2004;Kraenzel et al, 2003;Ola-Adams, 1993;Onyekwelu, 2007). Until now, no species-specific allometric equation for old limba plantations (> 40 y) exists.…”

Section: Estimates Of Aboveground Biomass Using Models and Field Datamentioning

confidence: 99%

“…For 30 y old Nauclea didderichii plantations, the crown biomass accounts for 16% (Onyekwelu, 2007). The crown biomass of teak plantations varies from 18 to 25% (Kraenzel et al, 2003).…”

Section: Aboveground Biomassmentioning

confidence: 99%

“…Merr. (Nigeria) have also taken place (Ola-Adams, 1993;Onyekwelu, 2007;Pendje, 1993). However, these data were collected from other climate regions (Ola-Adams, 1993;Onyekwelu, 2007) or from small plots (<1 ha) (Pendje, 1993).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The potential of plantations of Terminalia superba Engl. & Diels for wood and biomass production (Mayombe Forest, Democratic Republic of Congo)

et al. 2010

View full text Add to dashboard Cite

Abstract• In the 1940s-1950s, large limba (Terminalia superba Engl. & Diels) plantations were established in the Democratic Republic of Congo to reduce the pressure on the natural forests.• The objective of this study was to evaluate the potential of these long-rotation plantations as production forests (timber) and carbon sinks.• Five different plantations, between 50 and 58 years old, were sampled. Over a sample surface of more than 73 ha, the diameter above buttresses of 2 680 trees, bole height of 265 trees and tree height of 128 trees was measured.• To estimate the commercial volume, a nonlinear power law regression was used (R 2 = 0.95). A power law variance function was applied to counter heteroscedasticity of the residual plot. Estimates of commercial tree and stand volume at 50 to 58 y were 5.6 ± 4.1 m 3 and 183.9 ± 135.0 m 3 ha −1 . Stand volumes appear low but are explained by a large decrease in tree density. However, the mean volume increment of 3.2-3.7 m 3 ha −1 y −1 corresponds well with teak plantations of a similar age. For limba, aboveground biomass and carbon estimates of this study (resp. 108.4 and 54.2 Mg ha −1 ) differ significantly from those of existing aboveground biomass models (resp. 135.7-143.9 Mg ha −1 biomass and 67.9-72.0 Mg ha −1 C). All aboveground biomass and carbon estimates for T. superba stands were lower than for the estimates of young fast-growing plantations like Tectona grandis L. f., Eucalyptus spp. and Acacia spp. (≤ 30 y). Mots-clés :Terminalia superba / Afrique centrale / plantation / volume / biomasse Résumé -Le potentiel des plantations de Terminalia superba Engl. & Diels dans la production de bois et de biomasse (forêt de Mayombe, République Démocratique du Congo).• Dans les années 1940-1950, de grandes plantations de limba (Terminalia superba Engl. & Diels) on été mises en place en République Démocratique du Congo afin de réduire la pression sur les forêts naturelles.• L'objectif de cette étude était d'évaluer le potentiel de ces plantations anciennes comme forêts de production de bois d'oeuvre et puits de carbone.• Cinq plantations différentes, âgées de 50 à 58 ans, ont été échantillonnées. Sur une surface de plus de 73 ha, le diamètre au-dessus des contreforts de 2 680 arbres, la hauteur de fût de 265 arbres et la hauteur totale de 128 arbres ont été mesurés.• Le volume commercial a été estimé à l'aide d'une régression du type loi de puissance (R 2 = 0.95). Une fonction de variance du même type a été adoptée pour supprimer l'hétéroscedasticité des résidus. Le volume commercial a été estimé à 5.6 ± 4.1 m 3 par arbre et 183.9 ± 135.0 m 3 ha −1 . Ce dernier volume semble faible mais peut être expliqué par une chute de la densité d'arbres. Toutefois, l'accroissement moyen en volume (3,2-3,7 m 3 ha −1 an −1 ) correspond bien avec des plantations de teck d'un âge comparable. Pour le limba, il y a une différence significative entre les valeurs d'estimation de biomasse et de quantité de carbone épigés dans cette étude (resp. 108,4 Mg ha −1 et 54,2 Mg ha −1 ) et dans les...

show abstract

“…In this case, Nauclea diderrichii is the preferred indigenous species (unpubl. data, Onyekwelu, 2007), next to exotic species as teak, Eucalyptus spp. and Acacia spp.…”

Section: Discussionmentioning

confidence: 99%

Section: Estimates Of Aboveground Biomass Using Models and Field Datamentioning

confidence: 99%

“…For 30 y old Nauclea didderichii plantations, the crown biomass accounts for 16% (Onyekwelu, 2007). The crown biomass of teak plantations varies from 18 to 25% (Kraenzel et al, 2003).…”

Section: Aboveground Biomassmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The potential of plantations of Terminalia superba Engl. & Diels for wood and biomass production (Mayombe Forest, Democratic Republic of Congo)

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Besides, the equation is statistically was right, using diameter only as independent variable will be easier to work in the field in estimating a forest stand (Zianis, 2008;Pilli et al, 2006;Segura, 2005;Hashimoto et al, 2004;Aboal et al, 2005). In addition, the developed allometric equation that incorporate diameter alone would be practical, simple and economical (Onyekwelu, 2007). Values are expressed as mean ± standard deviation for three replicates plots; * T/R ratio: ratio of aboveground biomass to root biomass The productivity of biomass of each component of individual stand of K. ivorensis and H. odorata in the sample plot were calculated using allometric equation with diameter alone as independent variable.…”

Section: Biomass Storage Of K Ivorensis and H Odoratamentioning

confidence: 99%

Assessing Forest Plantation Productivity of Exotic and Indigenous Species on Degraded Secondary Forests

Heryati¹,

Abdu²,

Mahat³

et al. 2011

American Journal of Agricultural and Biological Sciences

View full text Add to dashboard Cite

Problem statement:There is general agreement that human activities such as deforestation and land use change to other land use types have contributed to degraded secondary forests or forestland and increases the emission of greenhouse gases which ultimately led to global climate change. An establishment of forest plantation in particular is regarded as an important approach for sequestering carbon. However, limited information exists on productivity and potential of fast growth exotic and indigenous tree plantations for sequestering CO 2 from the atmosphere through photosynthesis. This study aimed at assessing the productivity and biomass accumulation along with the potential for sequestering CO 2 of planted exotic and indigenous species on degraded forestland. Approach: This study was conducted at Khaya ivorensis and Hopea odorata plantations, which was planted at the Forest Research Institute Malaysia (FRIM) Research Station in Sega mat Johor, Malaysia five years ago. In order, to evaluate the forest productivity and biomass accumulation of both species, we established plots with a size of 40x30 m in three replications in each stand, followed by measuring all trees in the plots in terms of height and Diameter at Breast Height (DBH). To develop allometric equation, five representative trees at each stand were chosen for destructive sampling. Results: The growth performance in terms of mean height, DBH, annual increment of height and diameter and basal area of exotic species (K. ivorensis) was significantly higher than that of the indigenous species (H. odorata). We used the diameter alone as independent variable to estimate stem volume and biomass production of both species. The stem volume of K. ivorensis stand was 43.13 m 3 ha −1 and was significantly higher than H. odorata stands (33.66 m 3 ha −1 ).The results also showed that the K. ivorensis and H. odorata stands have the potential to absorb CO 2 from the atmosphere which was stored in aboveground biomass with value 15.90 Mg C ha −1 and 13.62 Mg C ha -1 , respectively. In addition, the carbon content in root biomass of H. odorata stand was higher than that in K. ivorensis stand with value 7.67 Mg C haand 4.58 Mg C ha −1 , respectively. Conclusion/Recommendation:The exotic (K. ivorensis) and indigenous (H. odorata) species which was planted on degraded forestland exhibited different growth rate, biomass production and ability to absorb CO 2 from the atmosphere in each part of the tree. In general, forest productivity and ability to absorb CO 2 from the atmosphere of exotics species (K. ivorensis) was higher than that indigenous species (H. odorata). These findings suggest that forest plantation productivity has been affected by species characteristics and suitability of species to site condition. Thus, to sustain high productivity with suitable species selection for carbon sequestration, these factors should be considered for future forest establishment.

show abstract

Allometric equations to predict the total aboveground biomass of tree species in a planted forest in Egypt

et al. 2012

View full text Add to dashboard Cite

The aim of this study is to estimate the total above‐ground biomass (TAGB), stem height (H), diameter at breast height (dbh) and basal area of five tree species (ages 7‐8 years) irrigated by municipal sewage water in the Egyptian‐Chinese friendship forest, Sadat City, Egypt. From the biomass data that obtained through destructive sampling, models for predicting aboveground biomass were developed. The highest values for stem density and height were estimated for Eucalyptus citriodora, while the lowest value for density was obtained for Dalbergia sissoo and stem height for Khaya senegalensis. The highest values for basal area and dbh were obtained for Casuarina spp., while the lowest values were recorded for Dalbergia sissoo. Eucalyptus camaldulensis had the highest stand stem biomass and TAGB (55.5, 83.9 t DW ha‐1, respectively). In addition, Casuarina spp. had the highest leafy branches biomass (32.5 t DW ha‐1) while Dalbergia sissoo had the lowest values for all tree components. All the generated allometric equations had high correlation coefficients at high probability levels. Moreover, the results revealed that not only the dbh data can be used as independent variable for biomass determination, but also stem height and size index are recommended for biomass estimation (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Growth, biomass yield and biomass functions for plantation-grown Nauclea diderrichii (de wild) in the humid tropical rainforest zone of south-western Nigeria

Cited by 25 publications

References 20 publications

The potential of plantations of Terminalia superba Engl. & Diels for wood and biomass production (Mayombe Forest, Democratic Republic of Congo)

The potential of plantations of Terminalia superba Engl. & Diels for wood and biomass production (Mayombe Forest, Democratic Republic of Congo)

Assessing Forest Plantation Productivity of Exotic and Indigenous Species on Degraded Secondary Forests

Allometric equations to predict the total aboveground biomass of tree species in a planted forest in Egypt

Contact Info

Product

Resources

About