Development of Allometric Models for Estimating the Biomass of <i>Sclerocarya birrea</i> (A.Rich) Hoscht and <i>Boscia senegalensis</i> (Pers.) Lam. ex Poir.

Abstract

The objective of this study was to develop allometric models for estimating the biomass of Sclerocarya birrea (A.Rich) Hoscht and Boscia senegalensis (Pers.) Lam. ex Poir. The inventory of these ligneous was carried out at Widou Thiengoly (North of Senegal). The sample consists of 43 individuals of Boscia senegalensis and 15 individuals of Sclerocarya birrea. The selected individuals were dendrometrically characterized before being cut, compartmentalized (trunk, branches, and twigs) and weighed entirely. Simple regression tests were performed to examine the most explanatory dendrometric parameter (x) for biomass (y) according to two types of models: the linear model (y = ax + b) and the polynomial model of degrees 2 (y = ax 2 + bx + c).The criteria for selection and validity of the models are based firstly on the tests of normality, nullity, heterogeneity and autocorrelation of the residues. The results showed that the most explanatory dendrometric parameter of the biomass was the crown surface for Boscia senegalensis and the 1.30 m diameter for Sclerocarya birrea of all the tests performed, the second-order Polynomial model is the best predictor of above ground biomass for these two species. Thus, the allometric models established to predict the biomass of these two species are: y = 0.0023x 2 + 0.4851x − 0.0519 for Boscia senegalensis and y = 0.35x 2 + 10.35x − 12.90 for S. birrea; with very significant correlation coefficients (R 2

Allometric Models for Predicting Biomass and Carbon Pools of Boscia Senegalensis(Pers.) Lam. Ex Poir. (Capparaceae) Populations in Central Africa: A Case Study from Cameroon

“…The study established allometric equations for estimating the above-ground and below-ground biomass of B. senegalensis in the diameter range between 5.76 and 24.80 cm with mean (15.28 cm). This result is not similar to those of [60] (2.87 ± 1.18 cm) for B. senegalensis in Senegal. The allometric models developed vary from one compartment to another.…”

“…Indeed, the size of the sample in the development of allometric models is variable in the literature and takes into account the resources and time allocated to the study [6]. Some allometric biomass equations have been constructed from a limited number of individuals, 20 trees [62], 38 trees [63] , 17 trees [6] , 20 trees [64], 15 and 43 trees [60].…”

“…Indeed, the importance of regeneration in the plots studied is the fact that it promotes land protection by preventing rainwater from having a beating effect through foliage and root systems [74]. This result is superior to those [60] in B. senegalensis (42 ± 7.3 ind/ha) and S. birrea (6.1 ± 3.4 ind/ha) , [75] in Gmelina arborea stands (sites 2 = 182 ± 4.57 individuals/ha and site 3 = 98 ± 2.01 individuals/ha), [73] in Cashew plantation (168 ± 22.65 individuals/ha). The difference in density of the site studied with the other authors could be related to the ecological characteristics of the study environments, Montag including soil types, topography, climate, and cover.…”

Site-Species Allometry Equation for Theobroma cacao L. Biomass Estimation in Agroforestry Systems of Cameroon

“…Indeed, the size of the sample in the development of allometric equations varies in the literature and takes into account the fnancial and material resources and the time allocated to the study [39]. Some allometric biomass equations were constructed from a limited number of individuals, i.e., 17 trees [39], 20 trees [33], 38 trees [40], 15 and 43 trees [41], 40 trees ( [36]), and 40 and 50 trees [42]. Biomass estimation models vary according to the diferent compartments of Teobroma cacao.…”

Dendrochronological Potential and Impact of Climate Factors on Radial Growth of Two Species in the Sahelian Zone: <i>Boscia senegalensis</i> (Pers.) Lam. ex Poir and <i>Sclerocarya birrea</i> (A. Rich) Hoscht (Ferlo Nord/Senegal)

“…Before felling, the geographical coordinates of each stand were taken and the following dendrometric parameters were measured [32] (Figure 2). These are: -The total height (H) in meters (m); -The diameter (D) at 1.30 m and 0.3 m from the ground; -The diameter of the crown (Hp) in m.…”