Estimation of carbon allocation to the roots from soil respiration measurements of oil palm

Lamade, Emmanuelle; Djégui, Narcisse; Leterme, Philippe

doi:10.1007/bf00012067

Cited by 52 publications

(41 citation statements)

References 27 publications

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“…In contrast, the frond residues added to soil in oil palm plantations promote an input of SOM much less than the residue input and root decomposition of pasture (Lamade et al, 1996).…”

Section: Discussionmentioning

confidence: 97%

Soil carbon stocks and changes after oil palm introduction in the Brazilian Amazon

et al. 2012

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As oil palm has been considered one of the most favorable oilseeds for biodiesel production in Brazil, it is important to understand how cultivation of this perennial crop will affect the dynamics of soil organic carbon (SOC) in the long term. The aim of this study was to evaluate the changes in soil C stocks after the conversion of forest and pasture into oil palm production in the Amazon Region. Soil samples were collected in March 2008 and September 2009 in five areas: native forest (NARF), pasture cultivated for 55 years (PAST), and oil palm cultivated for 4 (OP-4), 8 (OP-8) and 25 years (OP-25), respectively. Soils were sampled in March 2008 to evaluate the spatial variability of SOC and nitrogen (N) contents in relation to the spacing between trees. In September 2009, soils were sampled to evaluate the soil C stocks in the avenues (inter rows) and frond piles, and to compare the total C stocks with natural forest and pasture system. Soil C contents were 22-38% higher in the area nearest the oil palm base (0.6 m) than the average across the inter row (0-4.5 m from the tree), indicating that the increment in soil organic matter (SOM) must have been largely derived from root material. The soil C stocks under palm frond piles were 9-26% higher than in the inter rows, due to inputs of SOM by pruned palm fronds. The soil carbon stocks in oil palm areas, after adjustments for differences in bulk density and clay content across treatments, were 35-46% lower than pasture soil C stocks, but were 0-18% higher than the native forest soil C content. The results found here may be used to improve the life cycle assessment of biodiesel derived from palm oil.

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“…In contrast, the frond residues added to soil in oil palm plantations promote an input of SOM much less than the residue input and root decomposition of pasture (Lamade et al, 1996).…”

Section: Discussionmentioning

confidence: 97%

Soil carbon stocks and changes after oil palm introduction in the Brazilian Amazon

et al. 2012

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“…Over a plantation life cycle, C org in the weeded circle, interrow, and frond stack increased by 5.6%, 5% and 16.2%, respectively. The increments in C org in the circle must have been largely derived from root material (Frazão et al, 2013;Lamade et al, 1996) as the circle is maintained free of aboveground plant material. By contrast, the large input of pruned fronds led to an increase in C org beneath the frond stack.…”

Section: Discussionmentioning

confidence: 99%

Carbon neutral? No change in mineral soil carbon stock under oil palm plantations derived from forest or non-forest in Indonesia

Khasanah

Noordwijk

Ningsih³

et al. 2015

Agriculture, Ecosystems & Environment

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A B S T R A C TSustainability criteria for palm oil production guide new planting toward non-forest land cover on mineral soil, avoiding carbon debts caused by forest and peat conversion. Effects on soil carbon stock (soil C stock ) of land use change trajectories from forest and non-forest to oil palm on mineral soils include initial decline and subsequent recovery, however modeling efforts and life-cycle accounting are constrained by lack of comprehensive data sets; only few case studies underpin current debate. We analyzed soil C stock (Mg ha À1 ), soil bulk density (BD, g cm À3 ) and soil organic carbon concentration (C org , %) from 155 plots in 20 oil palm plantations across the major production areas of Indonesia, identifying trends during a production cycle on 6 plantations with sufficient spread in plot age. Plots were sampled in four management zones: weeded circle (WC), interrow (IR), frond stacks (FS), and harvest paths (HP); three depth intervals 0-5, 5-15 and 15-30 cm were sampled in each zone. Compared to the initial condition, increases in C org (16.2%) and reduction in BD (8.9%) in the FS zone, was compensated by decrease in C org (21.4%) and increase in BD (6.6%) in the HP zone, with intermediate results elsewhere. For a weighted average of the four management zones and after correction for equal mineral soil basis, the net temporal trend in soil C stock in the top 30 cm of soil across all data was not significantly different from zero in both forest-and non-forest-derived oil palm plantations. Individual plantations experienced net decline, net increase or U-shaped trajectories. The 2% difference in mean soil C stock in forest and nonforest derived oil palm plantations was statistically significant (p < 0.05). Unless soil management changes strongly from current practice, it is appropriate for C footprint calculations to assume soil C stock neutrality on mineral soils used for oil palm cultivation. 2015 Z. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).

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“…We repeated this procedure every 60 min for all samples and controls, from 24 June at 0800 to 25 June at 0800 h and from 23 July at 2100 to 24 July at 2100 h. 2.5 Calculation of root respiration rate from soil respiration rate Soil respiration consists of autotrophic respiration by plant roots and heterotrophic respiration by soil microorganisms. The rate of root respiration can be estimated by comparing soil respiration in a container that lacks plants with soil respiration in a container that contains plants (Lamade et al 1996;Thierron and Laudelout 1996). Such root-exclusion methods are widely used to differentiate the root and microbial components of soil respiration.…”

Section: Measurement Of Soil Respirationmentioning

confidence: 99%

Linkages between diurnal patterns of root respiration and leaf photosynthesis in Quercus crispula and Fagus crenata seedlings

Makita

Kosugi

Kamakura

2014

J. Agric. Meteorol.

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The physiological traits of tree roots have been considered associating with photosynthetic capacity; however, the linkages between diurnal patterns of root respiration and assimilation in individual leaves are poorly understood. Our objectives were to investigate the diurnal patterns of tree root respiration and the assimilation under natural luminous environments and to explore the potential environmental drivers of root respiration and the assimilation by relating trees' diurnal cycle to commonly measured variables. We simultaneously and continuously measured individual leaf assimilation and root respiration in 3-year-old seedlings of Quercus crispula and Fagus crenata, which are commonly the dominant tree species in deciduous broad-leaved forests in Japan, in full-sun and in the dark. Net assimilation rates followed a diurnal pattern in both species, with a marked decline in the morning that corresponded to a rapid increase in photosynthetic photon flux density, an increase in leaf temperature, and a vapor pressure deficit. Similarly, root respiration rates in both species decreased around noon in the sun treatment, although the soil temperature continued to increase. Seedlings in the sun treatment had significantly higher rates of root respiration than seedlings that were kept in the dark. Our results suggest that the midday depression of leaf assimilation could lead to downward transport of photosynthetic products, causing a midday depression in root respiration on a diurnal time scale. Furthermore, the effects of changes in the assimilated carbon supply on root respiration are likely to vary with light conditions experienced by leaves.

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Estimation of carbon allocation to the roots from soil respiration measurements of oil palm

Cited by 52 publications

References 27 publications

Soil carbon stocks and changes after oil palm introduction in the Brazilian Amazon

Soil carbon stocks and changes after oil palm introduction in the Brazilian Amazon

Carbon neutral? No change in mineral soil carbon stock under oil palm plantations derived from forest or non-forest in Indonesia

Linkages between diurnal patterns of root respiration and leaf photosynthesis in Quercus crispula and Fagus crenata seedlings

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