Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Greenhouse gas emissions along a peat swamp forest degradation gradient in the Peruvian Amazon : soil moisture and palm roots effects
Lent, Jeffrey van; Hergoualc’h, Kristell ; Verchot, Louis ; Oenema, Oene ; Groenigen, Jan Willem van - \ 2018
Mitigation and Adaptation Strategies for Global Change (2018). - ISSN 1381-2386 - p. 1 - 19.
CH - CO - GHG - Mauritia flexuosa - NO - Peat swamp forest - Pneumatophores - Tropical peatland - Water-filled pore space
Tropical peatlands in the Peruvian Amazon exhibit high densities of Mauritia flexuosa palms, which are often cut instead of being climbed for collecting their fruits. This is an important type of forest degradation in the region that could lead to changes in the structure and composition of the forest, quality and quantity of inputs to the peat, soil properties, and greenhouse gas (GHG) fluxes. We studied peat and litterfall characteristics along a forest degradation gradient that included an intact site, a moderately degraded site, and a heavily degraded site. To understand underlying factors driving GHG emissions, we examined the response of in vitro soil microbial GHG emissions to soil moisture variation, and we tested the potential of pneumatophores to conduct GHGs in situ. The soil phosphorus and carbon content and carbon-to-nitrogen ratio as well as the litterfall nitrogen content and carbon-to-nitrogen ratio were significantly affected by forest degradation. Soils from the degraded sites consistently produced more carbon dioxide (CO2) than soils from the intact site during in vitro incubations. The response of CO2 production to changes in water-filled pore space (WFPS) followed a cubic polynomial relationship with maxima at 60–70% at the three sites. Methane (CH4) was produced in limited amounts and exclusively under water-saturated conditions. There was no significant response of nitrous oxide (N2O) emissions to WFPS variation. Lastly, the density of pneumatophore decreased drastically as the result of forest degradation and was positively correlated to in situ CH4 emissions. We conclude that recurrent M. flexuosa harvesting could result in a significant increase of in situ CO2 fluxes and a simultaneous decrease in CH4 emissions via pneumatophores. These changes might alter long-term carbon and GHG balances of the peat, and the role of these ecosystems for climate change mitigation, which stresses the need for their protection.
Report of the joint workshop "Smart Mitigation of GHG in livestock production", 29th and 30th November 2016, in Potsdam, Germany
Bunthof, C.J. - \ 2017
FACCE ERA-GAS - 6 p.
FACCE ERA-GAS - Mitigation - Greenhouse gases - GHG - Livestock - Livestock production - GHG emissions - Animal production systems - production technology
FACCE ERA-GAS (ERA-NET Cofund for Monitoring & Mitigation of Greenhouse gases from Agri- and Silvi-culture), together with the ERA-NET SusAn, (Sustainable Animal Production Systems) and ERA-NET ICT-AGRI 2 (Information and Communication Technologies and Robotics for Sustainable Agriculture) organized a joint workshop on 29-30 November in Potsdam to identify promising approaches to reduce GHG emissions in livestock production. The joint workshop, the first of its kind involving three ERA-NETs, had close to 70 participants from 22 different countries. The three ERA-NETs have already identified a number of potential areas of synergy. This workshop explored one of those areas in detail: Comparison of animal production systems with respect to GHGs. Particular attention was paid to the following two sub-topics: (1) Production technology and management (e.g. housing systems; optimal field and grazing management), and (2) Breeding, physiology, feed & nutrition.The outputs of the workshop will help to set the research priorities for future joint calls and other activities between the three ERA-NETs.
FACCE ERA-GAS 1st Research Programme Meeting, 10-11 October 2017, Wageningen
Keulen, Herman van - \ 2017
FACCE - ERA-GAS - Greenhouse gas - GHG - agriculture - Silviculture - Forestry
The first FACCE ERA-GAS Research Programme Meetingmeeting was organised by Wageningen University & Research with support from the Irish Agriculture and Food Development Authority (Teagasc). The purpose of the meeting was to officially launch the ten new research projects funded by the 2016 FACCE ERA-GAS joint call. The aim of these projects is to develop solutions to reduce greenhouse gas (GHG) emissions from agriculture and forestry and improve national GHG inventories.
NUTGRANJA 2.0 : a simple mass balance model to explore the effects of different management strategies on nitrogen and greenhouse gases losses and soil phosphorus changes in dairy farms
Prado, A. del; Corré, W.J. ; Gallejones, P. ; Pardo, G. ; Pinto, M. ; Hierro, O. del; Oenema, O. - \ 2016
Mitigation and Adaptation Strategies for Global Change 21 (2016)7. - ISSN 1381-2386 - p. 1145 - 1164.
Ammonia volatilisation - CH - Dairy farm - GHG - Grasslands - Leaching - Model - NO - Nitrogen - Phosphorus

Farm nutrient management has been identified as one of the most important factors determining the economic and environmental performance of dairy cattle (Bos taurus) farming systems. Given the environmental problems associated with dairy farms, such as emissions of greenhouse gases (GHG), and the complex interaction between farm management, environment and genetics, there is a need to develop robust tools which enable scientists and policy makers to study all these interactions. This paper describes the development of a simple model called NUTGRANJA 2.0 to evaluate GHG emissions and nitrogen (N) and phosphorus (P) losses from dairy farms. NUTGRANJA 2.0 is an empirical mass-balance model developed in order to simulate the main transfers and flows of N and P through the different stages of the dairy farm management. A model sensitivity test was carried out to explore some of the sensitivities of the model in relation to the simulation of GHG and N emissions. This test indicated that both management (e.g. milk yield per cow, annual fertiliser N rate) and site-specific factors (e.g. % clover (Trifolium) in the sward, soil type, and % land slope) had a large effect on most of the model state variables studied (e.g. GHG and N losses).

GHG mitigation of agricultural peatlands requires coherent policies
Regina, Kristiina ; Budiman, Arif ; Greve, Mogens H. ; Grønlund, Arne ; Kasimir, Åsa ; Lehtonen, Heikki ; Petersen, S.O. ; Smith, Pete ; Wosten, Henk - \ 2016
Climate Policy (2016). - ISSN 1469-3062 - p. 522 - 541.
agriculture - GHG - land use - mitigation - peat - policies

As soon as peat soil is drained for agricultural production, the peat starts to degrade, which causes emissions to the atmosphere. In countries with large peatland areas, the GHG mitigation potential related to management of these soils is often estimated as the highest amongst the measures available in agriculture. Although the facts are well known, the policies leading to diminished emissions are often difficult to implement. We have analysed the reasons why the mitigation potential is not fully utilized and what could be done better in national implementation of climate policies. Four cases are used to illustrate the necessary steps to reach mitigation targets: determining the amount and properties of peat soils, estimating the potential, costs and feasibility of the mitigation measures, and selecting and implementing the best measures. A common feature for all of the cases was that national and international climate policies have increased the public interest in GHG emissions from peat soils and increased the pressure for mitigation. Basically the same factors restrict the implementation of mitigation measures in all countries with significant peat soil areas. The most important of these is lack of policy coherence, e.g. ignoring climate policies when planning land use or agricultural policies. We conclude that GHG mitigation is achieved only if other policies, especially national regulations and strategies, are in line with climate policies.

Policy relevance

Agricultural peat soils could be used to help reach GHG mitigation goals in many countries, but the full potential of mitigation of peat soils is not used. Although peatland cultivation inevitably leads to loss of the whole peat layer and high emissions, there are few incentives or regulation to effectively minimize these losses. This article discusses the possibilities to reduce GHG emissions from agricultural peat soils, with specific emphasis on the barriers of implementing mitigation measures nationally. The lessons learned from the selected cases emphasize the role of all policy makers and their cooperation in planning coherent policies for achieving the goals determined by climate policies.

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