Allometric equations for biomass estimation of Enset (Ensete ventricosum) grown in indigenous agroforestry systems in the Rift Valley escarpment of southern-eastern Ethiopia

Negash, Mesele; Starr, Michael; Kanninen, Markku

doi:10.1007/s10457-012-9577-6

Cited by 37 publications

(43 citation statements)

References 18 publications

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“…Wood densities for tree species were obtained form global database (Zanne et al, 2009), Carbon (C) content for tree from Kuyah et al (2012), for enset and coffee from Negash et al (2013a) and Negash et al (2013b), resepctivley (Table 3; Appendix B). Using wood densities and C contents of each biomass compartment, the biomass module converts stemwood volume to biomass and carbon stoarge.…”

Section: Biomass Carbon Modulementioning

confidence: 99%

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Modeling biomass and soil carbon sequestration of indigenous agroforestry systems using CO2FIX approach

Negash

Kanninen

2015

Agriculture, Ecosystems & Environment

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Section: Biomass Carbon Modulementioning

confidence: 99%

“…For enset and coffee plants, allometric equations developed by Negash et al (2013a) and Negash et al (2013b) were used, respectively. The turnover rate of each biomass compartment (foliage, branches and roots) in each cohort was calculated by multiplying the existing biomass by turnover coefficient (Appendix C).…”

Section: Biomass Carbon Modulementioning

confidence: 99%

Modeling biomass and soil carbon sequestration of indigenous agroforestry systems using CO2FIX approach

Negash

Kanninen

2015

Agriculture, Ecosystems & Environment

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“…Existing studies on enset have focused on its management and ecological roles (Brandt et al ., ), genetic pool and landraces (Tesfaye, , ) and its carbon sequestration potential (Negash et al ., ). The studies on khat dealt with the impact of the plant on public health (Geresu, ), livelihood, policy and trade conditions (Dessie, ; Njiru et al ., ; Kandari et al ., ).…”

Section: Introductionmentioning

confidence: 97%

“…Nevertheless, little attention has been given to develop easy ways of estimating the yields of both perennial crops. A recent study reported allometric models for the above and belowground biomass of enset (Negash et al ., ), but neglected its processed edible products called kocho and bula . Allometric equations using simple measurable plant variables as predictors for edible or commercial plant yield are time‐saving tools providing valuable information for identifying productivity challenges and solutions for improving smallholders' food production and cash income.…”

Section: Introductionmentioning

confidence: 99%

Allometric equations for yield predictions of enset (Ensete ventricosum) and khat (Catha edulis) grown in home gardens of southern Ethiopia

Mellisse

Descheemaeker

Mourik

et al. 2017

Annals of Applied Biology

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Enset is a large, single-stemmed perennial herbaceous plant domesticated as a staple food crop only in Ethiopia. Khat is a perennial plant cultivated for its economically important leaves and twigs that are the sources of stimulant when chewed. We address the issue of yield estimation of both crops, as they are important for the livelihoods of smallholders in the home garden systems in Southern Ethiopia and have received little attention so far. The objective of this study was to develop linear allometric models for estimating the edible (food and feed) and commercial yields of enset and khat plants, respectively. Data were collected from 20 enset and 100 khat plants. Diameter at 50-cm height (d 50 ), pseudostem height (h p ) and their combination were good predictor variables for the food products of enset with adjusted R 2 values above 0.85, while d 50 , h p, edible pseudostem height (h ep ), total height (h t ) and their combination were good predictor variables for the feed products of enset with adjusted R 2 values above 0.70. For dwarf khat plants crown area (ca) combined with total height (h t ) resulted in the best prediction with an adjusted R 2 of 0.77, while the leaf and twig dry weight for tall khat plants was best predicted by ca with adjusted R 2 of 0.43. In all cases linear models were used.

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“…The observations meet the assumptions of independence with equal error variances. A general non-linear biomass equation (Y ¼ pX p 1 1 X p 2 2 X p 3 3 ⋯X p n n θ ) was used to develop equations for each gender relating tree component and belowground biomass (Xiao and Ceulemans 2004;Mesele et al 2013;Nazanin and Taraneh 2013;Rosta et al 2014;Fabiola et al 2015), where Y is dry matter of a component and X i the independent variables, p 0 − p n are model coefficients, and θ represents the multiplicative error term. For each biomass component, equations were developed with different combination of independent variable: (i) DBH, (ii) tree volume index (DBH 2 H dm 3 ), and (iii) the combination of DBH, H, and CL, where DBH is the diameter at breast height, H the tree height, and CL the crown length.…”

Section: Discussionmentioning

confidence: 99%

Biomass allocation patterns and allometric relationships between components of the androdioecious Acer tegmentosum

Zhang

Zhao

2016

Annals of Forest Science

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& Key messageWe present comparisons about biomass allocation between males and hermaphrodites of androdioecious Acer tegmentosum Maxim.. Different biomass allocation patterns were found, and males were shown to have a larger investment into coarse roots and foliage. & Context Sexual dimorphism in differences of reproductive costs between genders has been widely reported for trees, but we still know little about allometric relationships between tree components in both genders. & Aims We present biomass allocation patterns and relationships between components of the androdioecious A. tegmentosum in a broad-leaved mixed forest in northeastern China. The objectives of this study were to examine how gender affects the biomass structure of androdioecious species and how the gender-related reproductive efforts affect the allometric relationships. & Methods We harvested 31 hermaphrodite and 29 male A. tegmentosum trees and opted for diameter at breast height, tree height, and crown length as the independent variables and various biomass components as the dependent variables. Five types of function were used to model allometry equations. & Results Biomass allocation between genders was different, and the best biomass model for each biomass component varies between genders. Males have a higher investment in foliage and coarse root biomass than hermaphrodites, and hermaphrodites invested more in reproduction than males.& Conclusion Biomass equations are strongly gender-related. Males tended to invest a larger fraction of the vegetative biomass into leaves and coarse roots.

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Allometric equations for biomass estimation of Enset (Ensete ventricosum) grown in indigenous agroforestry systems in the Rift Valley escarpment of southern-eastern Ethiopia

Cited by 37 publications

References 18 publications

Modeling biomass and soil carbon sequestration of indigenous agroforestry systems using CO2FIX approach

Modeling biomass and soil carbon sequestration of indigenous agroforestry systems using CO2FIX approach

Allometric equations for yield predictions of enset (Ensete ventricosum) and khat (Catha edulis) grown in home gardens of southern Ethiopia

Biomass allocation patterns and allometric relationships between components of the androdioecious Acer tegmentosum

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