Carbon sequestration and net emissions of CH4 and N2O under agroforestry: Synthesizing available data and suggestions for future studies

Kim, Dong-Gill; Kirschbaum, Miko U.F.; Beedy, Tracy

doi:10.1016/j.agee.2016.04.011

Cited by 172 publications

(132 citation statements)

References 106 publications

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“…Meta-analyses from temperate areas present compelling evidence that an increase in the complexity in the agricultural landscape through agroforestry systems delivers more supporting and regulating ecosystem services, such as carbon sequestration, maintenance of biodiversity, water quality, nutrient recycling, soil fertility and erosion, than conventional land use (Tsonkova et al 2012;Kim et al 2016;Torralba et al 2016;Wilson and Lovell 2016).…”

Section: Introductionmentioning

confidence: 99%

Exploring the potential of edible forest gardens: experiences from a participatory action research project in Sweden

Björklund

Eksvärd²,

Schäffer

2018

Agroforest Syst

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To meet the environmental challenges that are presently confronting society, the narrow focus on agricultural production needs to be altered to one that places equal value on the generation of crucial ecosystem services. Current research shows that perennial intercropping systems such as agroforestry may be a feasible alternative. Based on studies during the establishment of edible forest gardens in 12 participating farms in Sweden, this paper explores the potential of utilizing multi-strata designs for food production in temperate, highincome countries. Design and species composition of such gardens, types of food they provide, and how they would best fit into the present landscape are discussed. Factors for success and major problems related to the establishment are shared. Potential benefits were found to be closely related to a thorough analysis of the social and ecological contexts before establishment. Characteristics of the site and goals of the garden need to guide species and design choices. If forest garden approaches to food production should contribute to more than local selfsufficiency, the gardens need to increase in scale. Marginal lands and transitions areas between different land uses may be appropriate. Large knowledge gaps concerning potential production, social and economic benefits, and agronomic issues were identified.

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Section: Introductionmentioning

confidence: 99%

Exploring the potential of edible forest gardens: experiences from a participatory action research project in Sweden

Björklund

Eksvärd²,

Schäffer

2018

Agroforest Syst

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“…In such systems, the observed soil organic carbon (SOC) stocks are also generally higher compared to cropland (Albrecht and Kandji, 2003;Kim et al, 2016;Lorenz and Lal, 2014). Cardinael et al (2017) measured a mean SOC stock accumulation rate of 0.24 (0.09-0.46) t C ha −1 yr −1 at 0-30 cm of depth in several silvoarable systems compared to agricultural plots in France.…”

mentioning

confidence: 99%

High organic inputs explain shallow and deep SOC storage in a long-term agroforestry system – combining experimental and modeling approaches

et al. 2018

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Abstract. Agroforestry is an increasingly popular farming system enabling agricultural diversification and providing several ecosystem services. In agroforestry systems, soil organic carbon (SOC) stocks are generally increased, but it is difficult to disentangle the different factors responsible for this storage. Organic carbon (OC) inputs to the soil may be larger, but SOC decomposition rates may be modified owing to microclimate, physical protection, or priming effect from roots, especially at depth. We used an 18-year-old silvoarable system associating hybrid walnut trees (Juglans regia × nigra) and durum wheat (Triticum turgidum L. subsp. durum) and an adjacent agricultural control plot to quantify all OC inputs to the soil -leaf litter, tree fine root senescence, crop residues, and tree row herbaceous vegetation -and measured SOC stocks down to 2 m of depth at varying distances from the trees. We then proposed a model that simulates SOC dynamics in agroforestry accounting for both the whole soil profile and the lateral spatial heterogeneity. The model was calibrated to the control plot only.Measured OC inputs to soil were increased by about 40 % (+ 1.11 t C ha −1 yr −1 ) down to 2 m of depth in the agroforestry plot compared to the control, resulting in an additional SOC stock of 6.3 t C ha −1 down to 1 m of depth. However, most of the SOC storage occurred in the first 30 cm of soil and in the tree rows. The model was strongly validated, properly describing the measured SOC stocks and distribution with depth in agroforestry tree rows and alleys. It showed that the increased inputs of fresh biomass to soil explained the observed additional SOC storage in the agroforestry plot. Moreover, only a priming effect variant of the model was able to capture the depth distribution of SOC stocks, suggesting the priming effect as a possible mechanism driving deep SOC dynamics. This result questions the potential of soils to store large amounts of carbon, especially at depth. Deep-rooted trees modify OC inputs to soil, a process that deserves further study given its potential effects on SOC dynamics.

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“…Jednak emisja N 2 O z gleb pod systemami rolno-leoenymi nieznacznie tylko ró¿ni siê od emisji tego gazu z gleb rolnych (Kim et al 2016). Z tego powodu taki system u¿ytkowania gleb raczej nie powinien byae rozwa¿any jako sposób zmniejszenia emisji N 2 O w Polsce.…”

Section: Wstêpunclassified

Assessment of various practices of the mitigation of N2O emissions from the arable soils of Poland

Sosulski¹,

Szymańska²,

Szara³

2017

Soil Science Annual

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Streszczenie: Celem pracy by³a ocena efektywnooeci i mo¿liwooeae wdro¿enia praktyk mitygacji emisji N 2 O w warunkach glebowoklimatyczno-agrotechnicznych Polski. Analizie poddano praktyki polegaj¹ce na: zmniejszeniu dawki azotu, doborze jego formy w nawozach i zastosowaniu inhibitorów biologicznych przemian zwi¹zków azotowych w glebie, regulacji odczynu gleby, kontroli i zmniejszeniu dawek nawozów naturalnych, zalesianiu gleb najs³abszych. Analiza dostêpnych danych wykaza³a, ¿e warunki sprzyjaj¹ce intensywnej emisji N 2 O z gleb uprawnych Polski wystêpuj¹ incydentalnie. Z tego powodu efektywnooeae praktyk polegaj¹cych na ekstensyfikacji produkcji rooelinnej mo¿e byae ma³a. Zmniejszenie poziomu nawo¿enia mo¿e przynieoeae po¿¹dany efekt mitygacyjny tylko w niewielkiej liczbie gospodarstw rolnych z intensywn¹ produkcj¹ roln¹. Poniewa¿ gleby zakwaszone s¹ postrzegane jako "hot spots" o podwy¿szonej emisji N 2 O, regulacja ich odczynu powinna byae traktowana jako praktyka mitygacji emisji tlenku diazotu o szerokim zastosowaniu ze wzglêdu na skalê zakwaszenia gleb Polski. Efektywn¹ praktyk¹ ograniczenia emisji N 2 O z gleb rolnych mo¿e byae zastosowanie inhibitorów nitryfikacji lub ureazy oraz zalesianie gleb ornych najs³abszych (VI klasa bonitacyjna). Wdro¿enie tych praktyk mo¿e byae ograniczone wzglêdami ekonomicznymi oraz przestrzenno-czasowym wymiarem planów zwiêksze-nia lesistooeci kraju. Uwzglêdnienie efektów mitygacyjnych analizowanych praktyk wymaga weryfikacji algorytmów wykorzystywanych do kalkulacji emisji gazów cieplarnianych (GHG).S³owa kluczowe: emisja N 2 O, zmniejszenie emisji GHG, gleby uprawne

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Carbon sequestration and net emissions of CH4 and N2O under agroforestry: Synthesizing available data and suggestions for future studies

Cited by 172 publications

References 106 publications

Exploring the potential of edible forest gardens: experiences from a participatory action research project in Sweden

Exploring the potential of edible forest gardens: experiences from a participatory action research project in Sweden

High organic inputs explain shallow and deep SOC storage in a long-term agroforestry system – combining experimental and modeling approaches

Assessment of various practices of the mitigation of N2O emissions from the arable soils of Poland

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