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| Registros recuperados: 25 | |
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| Marconi, Luis; Armengot, Laura. |
| In addition to their potential against deforestation and climate change, agroforestry systems may have a relevant role in biodiversity conservation. In this sense, not only species richness per se, but also community composition, including the distribution range of the species, should be considered. The latter is especially relevant in the current context of biotic homogenization, where the presence of geographically widely distributed species is increasingly frequent in detriment of native species. By studying plant species of the herbaceous stratum of cacao production systems, we can evaluate, at a narrow local scale (>10 ha), the potential role of agroforestry systems and management intensity in diversity conservation and against biotic... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry. |
| Ano: 2020 |
URL: http://orgprints.org/36701/1/Marconi_Armengot-2019-AgricultureEcosysEnvi-Vol287-106664-p1-9.pdf |
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| Niether, Wiebke; Schneidewind, Ulf; Armengot, Laura; Adamtey, Noah; Schneider, Monika; Gerold, Gerhard. |
| Soil moisture has high spatial and temporal variability, depending on topography, soil texture, vegetation and meteorological conditions. It influences many processes in the soil and supplies water to the vegetation. This is often a limiting factor in agricultural production. Over an 18-month period, we measured soil moisture dynamics down to a depth of 70 cm in a long-term trial in Bolivia comprising six different land-use systems, i.e. cocoa monocultures and agroforestry systems, both under organic and conventional management, successional cocoa agroforestry systems and a natural fallow. Soil was heterogeneous over the area and in depth. We identified and separated two soil groups which differed in both, texture and soil water retention capacity.... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry; Soil; Bolivia; Environmental aspects. |
| Ano: 2017 |
URL: http://orgprints.org/32091/1/Niether-etal-2017-Catena-Vol158-p340-349.pdf |
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| Romero, Albert; Chamorro, Lourdes; Blanco-Moreno, José Manuel; Armengot, Laura; Jose María, Laura; Sans, Francesc Xavier. |
| An extensive survey of weed vegetation was conducted in the crop edges of 180 organic and conventional dryland cereal fields in nine localities of NE Iberian Peninsula to assess the effect of landscape agricultural intensification and management on weed diversity. This preliminary results show that averaged weed species richness per edge (alpha-diversity) and floristic homogeneity among edges are higher in organic than conventional fields. Only in conventionally managed fields, elevated landscape intensification is associated to higher weed alpha-diversities and floristic homogeneity among crop edges. The expression of high-quality weed flora is higher in organic than in conventional crop edges but, conversely, it is only sensitive to landscape... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2008 |
URL: http://orgprints.org/12302/1/Romero_12302_ed.doc |
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| Wurtz, Marion; Armengot, Laura; Andres, Christian; Milz, Joachim; Alcon, Freddy; Schneider, Monika. |
| To estimate the cocoa dry bean weight from the fresh weight a standard dry bean factor (DBF) ranging from 32% to 40% is usually applied. This factor, i.e. the relation between the dry bean weight (fermented and dried) and the fresh weight at pod opening, is used by cooperatives and factories that buy the fresh beans of the farmers. However, this factor is subjected to seasonal fluctuations and can be highly influenced by rainfall. Therefore, for instance, higher values are expected during the dry season compared with the rainy season. The objective of this study was to evaluate the accuracy of the use of a standard fix DBF value compared with the use of actual DBF values periodically collected over the season for assessing the performance of 12 cocoa... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Systems research and participatory research; Crop husbandry. |
| Ano: 2015 |
URL: http://orgprints.org/29760/1/Schneider-etal-2015-LIFKkoTS-tropentag.pdf |
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| Rotchés-Ribalta, Roser; Armengot, Laura; Mäder, Paul; Mayer, Jochen; Sans, Francesc Xavier. |
| The intensification of farming practices has reduced weed infestations, but it has also led to a reduction in weed diversity and changes in species composition. These effects are well described for aboveground flora; however, it is less clear how these effects might be expressed in the soil weed seedbank. We evaluated the effects of different long-term farm management strategies on the weed seedbank abundance, diversity, and community composition in the DOK (bioDynamic, bioOrganic, and Konventionell) field trial established in 1978 at Therwil, Switzerland. The trial compares biodynamic, organic, and conventional farming systems, which mainly differ in fertilization, weed control strategies, and pest control. The species richness and seed abundance of the... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Weed management. |
| Ano: 2017 |
URL: http://orgprints.org/31248/1/rotches-ribalta-etal-2017-WeedScience-Vol65-p73-82.pdf |
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| Baldivieso-Freitas, P.; Blanco-Moreno, José Manuel; Armengot, Laura; Chamorro, Lourdes; Romanyà, Joan; Sans, F. Xavier. |
| Conservation agriculture and organic farming are two alternative strategies that aim to improve soil quality and fertility in arable cropping systems through the deployment of different practices, that are rarely combined. While conservation agriculture practices include reducing tillage intensity and maintaining soil cover all year round to prevent soil erosion, organic farming focuses on nutrient recycling, using farmyard manure and green manure to enhance soil quality. However, these practices are not free from side-effects, such as increasing weed infestation or limited nutrient availability. Therefore it is necessary to explore the sustainability of their combination under local environmental constraints. The objectives of this study were to evaluate... |
| Tipo: Journal paper |
Palavras-chave: Soil quality Crop combinations and interactions Soil biology Cereals; Pulses and oilseeds Composting and manuring Soil tillage Weed management. |
| Ano: 2018 |
URL: http://orgprints.org/32378/1/STILL-17-515R3.pdf |
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| Niether, Wiebke; Armengot, Laura; Andres, Christian; Schneider, Monika; Gerold, Gerhrad. |
| Shade trees in agroforestry systems protect the understory cocoa from climate extremes. Shade tree pruning manages microclimatic conditions in favor of cocoa production while tree diversity is maintained. Adaptation of pruning has to consider seasonal changes in temperature and precipitation to protect the understory cocoa. Context Structural characteristics of tree stands such as species diversity, tree density, and stratification can affect throughfall and microclimate. Pruning changes the canopy and may therefore modulate internal conditions. Aims The aim of this study is to assess the environmental growing conditions of cocoa trees. Methods We monitored canopy openness and the impact of stand structure on throughfall and microclimate in three... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry. |
| Ano: 2018 |
URL: http://orgprints.org/34493/1/niether-etal-2018-AnnalsForrestScience-Vol75-38.pdf |
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| Bourgeois, Bérenger; Munoz, Francois; Fried, Guillaume; Mahaut, Lucie; Armengot, Laura; Denelle, Pierre; Storkey, Jonathan; Gaba, Sabrina; Violle, Cyrille. |
| PREMISE OF THE STUDY: Despite long-term research efforts, a comprehensive perspective on the ecological and functional properties determining plant weediness is still lacking. We investigated here key functional attributes of arable weeds compared to non-weed plants, at large spatial scale. METHODS: We used an intensive survey of plant communities in cultivated and non-cultivated habitats to define a pool of plants occurring in arable fields (weeds) and one of plants occurring only in open non-arable habitats (non-weeds) in France. We compared the two pools based on nine functional traits and three functional spaces (LHS, reproductive and resource requirement hypervolumes). Within the weed pool, we quantified the trait variation of weeds along a... |
| Tipo: Journal paper |
Palavras-chave: Biodiversity and ecosystem services; Weed management. |
| Ano: 2019 |
URL: http://orgprints.org/36356/1/Bourgeois_etal_2019_AmJBot-Vol106-Issue1-p90-100.pdf |
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| Pfiffner, Lukas; Armengot, Laura. |
| Over the last century, the intensification of agriculture with high inputs of synthetic pesticides and fertilisers combined with monocrop specialisation has been detrimental to the diversity of genetic resources of crop varieties and livestock breeds, to the wild flora and fauna species and to the diversity of ecosystems. Higher levels of biodiversity can strengthen farming systems and its resilience under changing environmental conditions. This chapter gives an overview of the impact of organic farming on biodiversity. The chapter considers land-use intensity, the impact of organic farming on biodiversity, biodiversity at different spatial scales and the impact of organic farming on selected functional groups. Finally, the chapter discusses some examples... |
| Tipo: Book chapter |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2018 |
URL: http://orgprints.org/34334/1/Book-%20Improving%20organic%20crop%20cultivation.pdf |
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| Armengot, Laura; Barbieri, Pietro; Andres, Christian; Milz, Joachim; Schneider, Monika. |
| The global demand for cacao has recently increased. To meet this demand, the cultivated area has been expanded in tropical forest areas and production has intensified by replacing traditional agroforestry systems with monocultures. This has led to a loss of biodiversity in cacao-growing areas. More sustainable production systems such as agroforestry and organic managed systems are expected to yield less cacao, but by-crops and premium prices, respectively, might economically compensate for the lower yields. Here, we compared the productivity and the return on labor, that is the return per working day, of four different cacao production systems: agroforestry and monocultures under organic and conventional management. Cacao and by-crop yields, costs,... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry; Bolivia. |
| Ano: 2016 |
URL: http://orgprints.org/30968/1/Armengot_at_al_2016_ASD_art_10.1007_s13593-016-0406-6.pdf |
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| Chamorro, Lourdes; Armengot, Laura; José-María, Laura; Sans, F. Xavier. |
| The Area of Natural Interest of Gallecs (ANIG) is one of the largest areas of arable land managed organically in Catalonia. In 2005 a project was launched to convert fields to organic farming and recuperate traditional crop varieties. The aim of this work is to analyse the changes in diversity of the weed flora, including segetal and rare species, and of crops in 20 fields (ca. 50 ha) after the conversion to organic farming during 5 cropping periods (2005-2010). Number of cultivated crops has increased from 1 to 17 including ancient and local varieties of cereal and legumes. Weed biodiversity increased by a 50% in five years at field and regional scale. Crop rotations and sowing organic seeds from other farmers can contribute to the increase and the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farming Systems; Biodiversity and ecosystem services; Spain. |
| Ano: 2014 |
URL: http://orgprints.org/23844/1/23844_MM.pdf |
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| Niether, Wiebke; Schneidewind, Ulf; Fuchs, Michael; Schneider, Monika; Armengot, Laura. |
| Farmers expect yield reduction of cash crops like cocoa when growing in agroforestry systems compared to monocultures, due to competition for resources, e.g. nutrients and water. However, complementarities between species in the use of resources may improve resource use efficiency and result in higher system performance. Cocoa trees have a shallow rooting system while the rooting characteristics of the associated trees are mainly unknown. This work investigates fine root distribution and production in five cocoa production systems: two monocultures and two agroforestry systems under conventional and organic farming, and a successional agroforestry system. In the organic systems a perennial leguminous cover crop was planted and compost was added, while... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry. |
| Ano: 2019 |
URL: http://orgprints.org/34492/1/niether-etal2019_ScienceTotalEnvironment-Vol657-p558-567.pdf |
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| Armengot, Laura; Berner, Alfred; Blanco-Moreno, José Manuel; Mäder, Paul; Sans, F.Xavier. |
| Agricultural practices, and mainly soil tillage, highly contribute to the emissions of greenhouse gases such as CO2 and N2O. Reducing the tillage improves the quality of the soil and may help mitigating the greenhouse emissions. In Europe, approximately 25 % of the arable land is managed under reduced tillage practices, including both notill and reduced tillage. However, they have been developed mainly in herbicidemanaged systems. The potential increase in weed infestation caused by the lack of soil inversion may threaten crop yields, and is one of the major drawbacks for the adoption of reduced tillage among organic farmers. We report the results from a field experiment comparing the reduced tillage with respect to the conventional tillage in the... |
| Tipo: Journal paper |
Palavras-chave: Soil tillage. |
| Ano: 2014 |
URL: http://orgprints.org/26861/1/E_Armengotetal_ASD_red_tillage_2014.pdf |
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| Pérez-Neira, David; Schneider, Monika; Armengot, Laura. |
| The increasing global demand for chocolate and related products has intensified their production systems by both replacing traditional agroforestry systems with monocultures and increasing the use of synthetic external inputs and machinery. High dependence on non-renewable energy is a clear symptom of unsustainability in food production systems. Consequently, more sustainable agricultural practices should be promoted. With a special focus on non-renewable energy, this work compares: i) the cumulate energy demand (CED), ii) energy return on investment (EROI), and iii) energy return on labour of four different cacao production systems: two agroforestry systems and two monocultures under organic and conventional management. Cacao and subproduct yields and the... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry. |
| Ano: 2020 |
URL: http://orgprints.org/36703/1/neira-etal-2020-AgriculturalSystems-Vol177-102711-p1-7.pdf |
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| Armengot, Laura; Barbieri, Pietro; Andres, Christian; Milz, Joachim; Alcon, Freddy; Trujillo, German; Schneider, Monika. |
| Cocoa cropping systems vary from full-sun monocrops to highly diversified agroforestry systems, which combine the cocoa production with by-crop such as bananas or plantains and trees with different functions. Additionally, these systems can be organically or conventionally managed. Although labour demand is one of the main activities contributing to the total production costs of the plantations and it may highly differ between production systems, there are still scarce data and information available. In this study we present the labour demands of five different production systems in a newly established cocoa plantation in Alto Beni, Bolivia. The trial was established in 2008 within the framework of the SysCom programme (www.systems-comparison.fibl.org)... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Systems research and participatory research; Crop husbandry. |
| Ano: 2015 |
URL: http://orgprints.org/29761/1/Armengot-etal-2015-Tropentag2015-abstract-313.pdf |
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| Geißler, M.; Armengot, Laura; Mäder, Paul; Krauss, Maike. |
| Armengot L, Berner A, Blanco-Moreno J, Mäder P & Sans FX (2014) Long-term feasibility of reduced tillage in organic farming. Agron Sustain Dev 35(1): 339-346. Cooper J et al. (2016) Shallow non-inversion tillage in organic farming maintains crop yields and increases soil C stocks: a meta-analysis. Agron Sustain Dev 36: 1-20. Gruber S & Claupein W (2009) Effect of tillage intensity on weed infestation in organic farming. Soil and Tillage Research 105(1): 104-111. Montgomery DR (2007) Dirt: The Erosion of Civilizations. University of California Press, California. Moonen AC & Barberi P (2004) Size and composition of the weed seedbank after 7 years of different cover-crop-maize management systems. Weed Research 44(3): 163-177. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil tillage Crop health; Quality; Protection Weed management. |
| Ano: 2017 |
URL: http://orgprints.org/31576/1/Beikrautsamenvorrat%20im%20Vergleich%20reduzierter%20und.pdf |
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| Riedel, Judith; Kägi, Nora; Armengot, Laura; Schneider, Monika. |
| Overaged full-sun cacao plantations and the need for sustainable production systems call for combining rehabilitation of plantations with the establishment of agroforestry. We tested the effect of drastic rehabilitation pruning of old cacao tree stock and the introduction of both high- and low-diversity agroforestry on survival, growth and yield of T. cacao in a commercial plantation in peninsular Malaysia over a period of 5 years. We further determined the incidence of pests and diseases of cacao pods and assessed the performance of the whole system for smallholder farmers, including yields of by-crops. Rehabilitation pruning negatively affected cacao tree development and short-term yield. No more effects of pruning on cacao yield were observed starting... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry. |
| Ano: 2019 |
URL: http://orgprints.org/34484/1/Riedel_etal_2019_cacaoPruningAgroforestry_supp.pdf |
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| Niether, Wiebke; Smit, Inga; Armengot, Laura; Schneider, Monika; Gerold, Gerhard; Pawelzik, Elke. |
| Cocoa beans are produced all across the humid tropics under different environmental conditions provided by the region but also by the season and the type of production system. Agroforestry systems compared to monocultures buffer climate extremes and therefore provide a less stressful environment for the understory cocoa, especially under seasonally varying conditions. We measured the element concentration as well as abiotic stress indicators (polyamines and total phenolic content) in beans derived from five different production systems comparing monocultures and agroforestry systems and from two harvesting seasons. Concentrations of N, Mg, S, Fe, Mn, Na, and Zn were higher in beans produced in agroforestry systems with high stem density and leaf area... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry. |
| Ano: 2017 |
URL: http://orgprints.org/34495/1/niether-etal-2018-JAgricFoodChem-Vol65-Issue47-pp10165%E2%80%9310173.pdf |
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| Schneidewind, Ulf; Niether, Wiebke; Armengot, Laura; Schneider, Monika; Sauer, Daniela; Heitkamp, Felix; Gerold, Gerhard. |
| Agroforestry systems (AFS) can serve to decrease ecosystem carbon (C) losses caused by deforestation and inadequate soil management. Because of their shade tolerance, cacao plants are suitable to be grown in AFS, since they can be combined with other kinds of trees and shrubs. The potential for C sequestration in cacao farming systems depends on various factors, such as management practices, stand structure and plantation age. We compared conventionally and organically managed cacao monoculture systems (MCS) and AFS in Sara Ana (Bolivia) with respect to C stocks in plant biomass and to amounts of litterfall and pruning residues. The total aboveground C stocks of the AFS (26 Mg C ha−1) considerably exceeded those of the MCS (~7 Mg C ha−1), although the... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry; Soil. |
| Ano: 2018 |
URL: http://orgprints.org/34494/1/schneidewind-etal-2018-ExperimentalAgri-online-p1-19.pdf |
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| Registros recuperados: 25 | |
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