Modeling the individual height and volume of two integrated crop-livestock-forest systems of &lt;i&gt;Eucalyptus&lt;/i&gt; spp. in the Brazilian Savannah

Abrantes, Karen Keli Barbosa; Paiva, Luísa Melville; Almeida, R. G. de; Urbano, Edílson; Ferreira, André Dominghetti; Mazucheli, Josmar

doi:10.4025/actasciagron.v41i1.42626

Cited by 8 publications

(7 citation statements)

References 20 publications

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“…It also has a strong correlation with other tree attributes, such as height, volume, and. Therefore, some studies also reported the diameter is the best variable to represent tree growth biomass (Puri et al, 2013;Lisboa et al, 2018;Abrantes et al, 2019). According to the results, the mean diameter of 25 sample trees was 16 cm with a minimum of 6.80 cm and a maximum of 25.89 cm (Table 1).…”

Section: Resultsmentioning

confidence: 98%

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Sadono

Wardhana

Idris

et al. 2021

J.Degrade.Min.Land Manage.

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The development of Eucalyptus urophylla in dryland ecosystems plays an important contribution to support climate change mitigation and renewable energy diversification. However, the information about the potential of E. urophylla for carbon reduction and energy production is rarely documented, even though it is necessary as fundamental considerations to determine the best strategy for sustainable natural resources management, primarily in dryland ecosystems. This study aimed to quantify the carbon storage and energy production of E. urophylla established in dryland ecosystems at East Nusa Tenggara. The study site is located in a eucalyptus plantation managed by Timor Tengah Selatan Forest Management Unit. Destructive sampling was conducted on 25 sample trees that were evenly distributed from small to big ones. The percentage of carbon content in every tree component, namely stem, branch, and foliage, was determined using elemental analysis, while the calorific value of each tree component was analyzed using a bomb calorimeter. Carbon storage in each component was calculated by multiplying biomass and the percentage of carbon content, while the energy production was computed by multiplying high heating value and biomass from every tree component. The results found the mean carbon storage of E. urophylla in the study site was 55.51 kg tree-1 with a minimum of 6.34 kg tree-1 and a maximum of 184.76 kg tree-1. The percentage of carbon content in the foliage was lower than other tree components by approximately 34.1%. Interestingly, the calorific value of foliage was relatively higher than stem and branch with around 5,252 kcal kg-1. The energy production of E. urophylla ranged from 252.6 to 7,813.3 MJ tree-1 with an average of 2,357.87 MJ tree-1. According to the results, this study concluded the development of E. urophylla in dryland ecosystems demonstrated a meaningful contribution to carbon absorption and energy production at East Nusa Tenggara.

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Section: Resultsmentioning

confidence: 98%

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Sadono

Wardhana

Idris

et al. 2021

J.Degrade.Min.Land Manage.

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“…However, due to its ease of use and, consequently, costeffective advantage, the single-entry equation was recommended. Good performances of single-entry models compared with double-entry ones in estimating the volume of eucalypt trees established in agroforestry systems in the savanna region were also related by Lemos-Júnior et al (2016) and Abrantes et al (2019). The Husch model was indicated, together with the Spurr model, by Santos et al (2019) for estimating the volume of Khaya ivorensis trees established in agroforestry systems, due to its goodness of fit and cost-effective.…”

Section: Discussionmentioning

confidence: 91%

“…Indeed, some efforts have been made to develop volumetric equations for trees in these systems (Abrantes et al 2019;Lemos-Junior et al 2016;Silva et al 2020;Aguiar Júnior et al 2022). However, uncertainty about the best models persists due to scatter in assessment methods, models tested, biomes, species, and spatial arrangements, as noted by Aguiar Júnior et al (2022).…”

Section: Introductionmentioning

confidence: 99%

Tree volume estimation for small silvopastoral systems: do we really need the height variable to obtain sufficiently accurate results?

Müller

Borges

Resende

et al. 2022

Preprint

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The objective of this study was to evaluate and compare the performance of single and double-entry volumetric models in estimating tree volume of eucalypt trees in different silvopastoral systems in Coronel Pacheco, Minas Gerais State, Brazil. Diameter at breast height, total height, and diameter outside the bark along the stems of the sample trees were recorded. Four single-entry and five double-entry volume models were fitted to the observed data for six strata consisting of different Eucalyptus genetic material and three silvopastoral systems, and were compared to select the best alternative. Double-entry models, specifically logarithmic Spurr and logarithmic Schumacher & Hall, fitted statistically better then single-entry ones for all but one of the strata, where they were overcome by the Husch’s model. However, although the superiority of the former can have been easily verified by different and complementary statistics, we found that the volume estimates provided by the best double-entry and the best single-entry model of each stratum differed by a quantity that can be considered irrisory, from both practical and monetary points of view. In a per tree basis, the differences, in absolute values, did not surpassed 0.051 m3, or only US$ 0.25, considering a market value of US$ 4.90/m3. And even when simulating a real scenario of batch sales for each stratum, by simple extrapolation of the mean volume and considering their effective tree stand, such differences did not exceed ±0.25 m3/ha, or ±US$ 1.20/ha. These findings suggest that the smallholder farmer does not need to estimate the height of its trees; more than this, he/she can save money by not having to do a complete forest inventory and by using single-entry models such as the Husch model for estimating the wood volume of his/her plant stand. Another highlight or reinforcement of this work is that the use of the Furnival index was crucial for a reliable selection of the best models, once it allows for comparisons at the same scale of variation.

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“…In a study of productivity and economic evaluation of crop-livestock-forest integration systems (ILPF), in Campo Grande -MS, the height did not show any difference between the tested spacing, with the clonal hybrid E. urophylla x E. grandis (clone H13), with 20.7 m for the spacing in ILPF of 14 m x 2 m, and in ILPF with 22 m x 2 m, being 21.6 m, at 8 years of age (Abrantes, et al, 2019). Ferreira, et al (2017) studied the growth and production of Eucalyptus grandis, E. pellita, E. saligna, and E. urophylla and the hybrid Eucalyptus urophylla x E. grandis.…”

Section: Discussionmentioning

confidence: 93%

Tree growth and soil fertility in plantations of genetic materials of Eucalyptus spp.

Brun

Scheis

Gorenstein

et al. 2021

RSD

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Were analyzed the growth and the relationship with soil fertility of genetic materials of Eucalyptus spp. planted in a non-traditional eucalyptus forestry region in Brazil. Five genetic materials were selected, two seminal: Eucalyptus urophylla and E. pellita and three clones: GFMO27, I224, and H13, planted in experimental plots in a completely randomized design. The diameter at breast height (DBH) and total height were measured; basal area and dendrometric variables were calculated, for the ages 24, 36, 48, 60, 72, and 108 months, both statistically compared. The soil was chemically characterized at 108 months of age and correlated with dendrometric variables. The growth of clones H13, I224, and GFMO 27 were superior to the E. pellita and E. urophylla. The levels of N and MO had a significant correlation with the volume and the Al+3 showed a positive correlation with DBH. Clone H13 showed higher values than the other materials, in all variables analyzed, reaching an individual volume of 1.27 m³ at 108 months. The other genetic materials (GFMO27, I244, and E. urophylla) proved to be variable in their growth behavior at different ages, and E. pellita had lower growth. The recommended genetic materials for planting are H13 and E. urophylla.

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Modeling the individual height and volume of two integrated crop-livestock-forest systems of <i>Eucalyptus</i> spp. in the Brazilian Savannah

Cited by 8 publications

References 20 publications

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Carbon storage and energy production of Eucalyptus urophylla developed in dryland ecosystems at East Nusa Tenggara

Tree volume estimation for small silvopastoral systems: do we really need the height variable to obtain sufficiently accurate results?

Tree growth and soil fertility in plantations of genetic materials of Eucalyptus spp.

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