Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Root- and peat-based $ CO_{2} $ emissions from oil palm plantations
Abstract Measured carbon dioxide ($ CO_{2} $) flux from peat soils using the closed chamber technique combines root-related (autotrophic + heterotrophic where rhizosphere organisms are involved) and peat-based (heterotrophic) respiration. The latter contributes to peat loss while the former is linked to recent $ CO_{2} $ removal through photosynthesis. The objective of this study was to separate root- from peat-based respiration. The study was conducted on peatland under 6 and 15 year old oil palm (Elaeis guineensis Jacq.) plantations in Jambi Province, Indonesia in 2011 to 2012. $ CO_{2} $ emissions were measured in the field from 25 cm diameter and 25 cm tall closed chambers using an infrared gas analyser. Root sampling and $ CO_{2} $ emissions measurements were at distances of 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, and 4.5 m from the centre of the base of the palm tree. The emission rate for the six and 15 year old oil palm plantations at ≥3.0 m from the centre of the tree were 38.2 ± 9.5 and 34.1 ± 15.9 Mg $ CO_{2} $ $ ha^{−1} $ $ yr^{−1} $, respectively. At distances <2.5 m, total respiration linearly decreased with distances from the trees. Heterotrophic respirations were 86 % of the 44.7 ± 11.2 and 71 % of 47.8 ± 21.3 Mg $ CO_{2} $ $ ha^{−1} $ $ yr^{−1} $ of weighted surface flux, respectively for the 6 and 15 year old plantations. We propose that $ CO_{2} $ flux measurements in oil palm plantations made at a distance of ≥3 m from the tree centre be used to represent the heterotrophic respiration that is relevant for the environmental impact assessment.
Root- and peat-based $ CO_{2} $ emissions from oil palm plantations
Abstract Measured carbon dioxide ($ CO_{2} $) flux from peat soils using the closed chamber technique combines root-related (autotrophic + heterotrophic where rhizosphere organisms are involved) and peat-based (heterotrophic) respiration. The latter contributes to peat loss while the former is linked to recent $ CO_{2} $ removal through photosynthesis. The objective of this study was to separate root- from peat-based respiration. The study was conducted on peatland under 6 and 15 year old oil palm (Elaeis guineensis Jacq.) plantations in Jambi Province, Indonesia in 2011 to 2012. $ CO_{2} $ emissions were measured in the field from 25 cm diameter and 25 cm tall closed chambers using an infrared gas analyser. Root sampling and $ CO_{2} $ emissions measurements were at distances of 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, and 4.5 m from the centre of the base of the palm tree. The emission rate for the six and 15 year old oil palm plantations at ≥3.0 m from the centre of the tree were 38.2 ± 9.5 and 34.1 ± 15.9 Mg $ CO_{2} $ $ ha^{−1} $ $ yr^{−1} $, respectively. At distances <2.5 m, total respiration linearly decreased with distances from the trees. Heterotrophic respirations were 86 % of the 44.7 ± 11.2 and 71 % of 47.8 ± 21.3 Mg $ CO_{2} $ $ ha^{−1} $ $ yr^{−1} $ of weighted surface flux, respectively for the 6 and 15 year old plantations. We propose that $ CO_{2} $ flux measurements in oil palm plantations made at a distance of ≥3 m from the tree centre be used to represent the heterotrophic respiration that is relevant for the environmental impact assessment.
Root- and peat-based $ CO_{2} $ emissions from oil palm plantations
Dariah, Ai (Autor:in) / Marwanto, Setiari (Autor:in) / Agus, Fahmuddin (Autor:in)
2013
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
43.47
Globale Umweltprobleme
/
43.47$jGlobale Umweltprobleme
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