Wood biomass recovery from chestnut orchards: results from a case study

Nati, Carla; Montorselli, Niccolò Brachetti; Olmi, Roberto

doi:10.1007/s10457-016-0050-9

Cited by 7 publications

(5 citation statements)

References 42 publications

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“…In Table 2 are presented the ground data of measured Wpw per tree, per site (sample of 30 trees) and per surface unit. The yield of Wpw per hectare was comparable with the data presented in a former study [91], where three chestnut groves produced from 22 up to 33 Mg ha −1 , but this result matches only with site A. In fact, although site A was different from the other three sites presented in the aforementioned study, showing an even bigger DBH on average compared to them, it had a similar pruning intensity.…”

Section: Wpw Ground Measurementsupporting

confidence: 85%

An Automatic UAV Based Segmentation Approach for Pruning Biomass Estimation in Irregularly Spaced Chestnut Orchards

Gennaro

Nati

Dainelli

et al. 2020

Forests

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The agricultural and forestry sector is constantly evolving, also through the increased use of precision technologies including Remote Sensing (RS). Remotely biomass estimation (WaSfM) in wood production forests is already debated in the literature, but there is a lack of knowledge in quantifying pruning residues from canopy management. The aim of the present study was to verify the reliability of RS techniques for the estimation of pruning biomass through differences in the volume of canopy trees and to evaluate the performance of an unsupervised segmentation methodology as a feasible tool for the analysis of large areas. Remote sensed data were acquired on four uneven-aged and irregularly spaced chestnut orchards in Central Italy by an Unmanned Aerial Vehicle (UAV) equipped with a multispectral camera. Chestnut geometric features were extracted using both supervised and unsupervised crown segmentation and then applying a double filtering process based on Canopy Height Model (CHM) and vegetation index threshold. The results show that UAV monitoring provides good performance in detecting biomass reduction after pruning, despite some differences between the trees’ geometric features. The proposed unsupervised methodology for tree detection and vegetation cover evaluation purposes showed good performance, with a low undetected tree percentage value (1.7%). Comparing crown projected volume reduction extracted by means of supervised and unsupervised approach, R2 ranged from 0.76 to 0.95 among all the sites. Finally, the validation step was assessed by evaluating correlations between measured and estimated pruning wood biomass (Wpw) for single and grouped sites (0.53 < R2 < 0.83). The method described in this work could provide effective strategic support for chestnut orchard management in line with a precision agriculture approach. In the context of the Circular Economy, a fast and cost-effective tool able to estimate the amounts of wastes available as by-products such as chestnut pruning residues can be included in an alternative and virtuous supply chain.

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Section: Wpw Ground Measurementsupporting

confidence: 85%

An Automatic UAV Based Segmentation Approach for Pruning Biomass Estimation in Irregularly Spaced Chestnut Orchards

Gennaro

Nati

Dainelli

et al. 2020

Forests

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“…For chestnut and pine, the crown fraction generated the highest calorific and energetic values, and bark and wood the lowest energetic values. Obviously, this may have direct consequences for waste management, with good opportunities for using the pruning remains from chestnuts grown for fruit and that require periodic pruning [45]. The calorific value per tree was lowest for chestnut (17,997 J/g), intermediate for the SRC crops (18,,419 J/g) and highest for maritime pine (19,366 J/g).…”

Section: High Heating Value Hhvmentioning

confidence: 99%

Evaluation of Tree Species for Biomass Energy Production in Northwest Spain

Álvarez‐Álvarez

Pizarro

Barrio-Anta

et al. 2018

Forests

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Three types of forest stands (chestnut coppice, maritime pine stands, and poplar and willow short-rotation woody crops (SRWC)) were evaluated to determine their potential for energy production. The properties of the main aboveground biomass fractions (wood, bark and crown) and also the whole tree were analysed, thus providing data that could be used for management purposes and for evaluating potential forest, biomass energy yields and atmospheric emissions. Proximate, elemental and energetic analyses of the biomass provided important information for evaluating the fuel potential. The energetic value of the biomass derived from the maritime pine stands was higher than that of the poplar and willow clonal stands and chestnut coppice stands. The high ash content of the chestnut bark, relative to that of the wood and crown material, is also an important consideration in relation to energy production. The proportion of carbon concentration accumulated per tree was very similar in all types of material studied, although the N and S contents were higher in the maritime pine stands than in the other stands. For this reason, selection of species and fractions can help to improve fuel quality and the efficiency of the combustion processes, and to minimize atmospheric emissions.

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“…(5) Chestnut (Castanea sativa Miller) soutos are a traditional land use system in north-western Iberia (Nati et al 2016). They consist of ancient valuable trees (400 years old), are protected by the NATURA 2000 habitat network and occupy more than 350,000 hectares of land in Galicia and about 40,000 ha in Portugal.…”

Section: Case Study Regionsmentioning

confidence: 99%

Spatial similarities between European agroforestry systems and ecosystem services at the landscape scale

et al. 2017

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Agroforestry systems are known to provide ecosystem services which differ in quantity and quality from conventional agricultural practices and could enhance rural landscapes. In this study we compared ecosystem services provision of agroforestry and non-agroforestry landscapes in case study regions from three European biogeographical regions: Mediterranean (montado and dehesa), Continental (orchards and wooded pasture) and Atlantic agroforestry systems (chestnut soutos and hedgerows systems). Seven ecosystem service indicators (two provisioning and five regulating services) were mapped, modelled and assessed. Clear variations in amount and provision of ecosystem services were found between different types of agroforestry systems. Nonetheless regulating ecosystems services were improved in all agroforestry landscapes, with reduced nitrate losses, higher carbon sequestration, reduced soil losses, higher functional biodiversity focussed on pollination and greater habitat diversity reflected in a high proportion of semi-natural habitats. The results for provisioning services were inconsistent. While the annual biomass yield and the groundwater recharge rate tended to be higher in agricultural landscapes without agroforestry systems, the total biomass stock was reduced. These broad relationships were observed within and across the case study regions regardless of the agroforestry type or biogeographical region. Overall our study underlines the positive influence of agroforestry systems on the supply of regulating services and their role to enhance landscape structure.

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Wood biomass recovery from chestnut orchards: results from a case study

Cited by 7 publications

References 42 publications

An Automatic UAV Based Segmentation Approach for Pruning Biomass Estimation in Irregularly Spaced Chestnut Orchards

An Automatic UAV Based Segmentation Approach for Pruning Biomass Estimation in Irregularly Spaced Chestnut Orchards

Evaluation of Tree Species for Biomass Energy Production in Northwest Spain

Spatial similarities between European agroforestry systems and ecosystem services at the landscape scale

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