Joan Romanyà

Joan Romanyà
University of Barcelona | UB · Department of Biology, Health and Environment

Soil Science Professor

About

86
Publications
24,369
Reads
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2,911
Citations
Introduction
Soil biogeochemistry, Land use change and land management, C sequestration, Land set aside, Organic farming practices, Mediterranean ecosystems,
Additional affiliations
January 2012 - present
Centro de Estudios Ambientales del Mediterráneo
January 2003 - December 2013
Universitat de Barcelona
Position
  • Professor (Full)

Publications

Publications (86)
Article
Soil organic carbon (SOC) sequestration is often quantified through the comparison of SOC stocks down to a fixed depth, usually 30 cm. This approach gives biased estimates because SOC sequestration changes soil bulk density. To account for these biases, the comparison of SOC stocks on an equivalent mass basis is recommended. How big are the biases...
Article
Forest fires can alter the biological properties of soils. There is increasing evidence that fires cause a shift in soil microbial communities, which play a central role in forest carbon and nutrient cycling. In this study we evaluate the effect of soil heating on soil microbial functions. We hypothesized that fire reduces the catabolic functional...
Article
Full-text available
Biochar plays a key role in soil phosphorus (P) forms and distribution by affecting soil biochemical characteristics with relevant effects on the microbial community. In this study, we aimed to study the role of biochar in the variation of microbial community and P forms, and the relationships between soil properties, microbial community, and P for...
Article
Full-text available
Background Manures and synthetic fertilisers can affect soil pH and plant-microbe processes and thus influence P forms and composition. Aims The objective of this study was to examine the effects of the 40-year application of synthetic fertilisers or pig manure combined with synthetic fertilisers on the P forms and composition and the response of...
Article
Full-text available
Plant communities and fertilization may have an impact on soil microbiome. Most commercial olive trees are minerally fertilized, while this practice is being replaced by the use of organic amendments. Organic amendments can both fertilize and promote plant growth-promoting organisms. Our aims were (i) to describe the changes in soil bacterial and f...
Article
Full-text available
Citation: Peñuelas, J.; Germain, J.; Álvarez, E.; Aparicio, E.; Arús, P.; Basnou, C.; Blanché, C.; Bonada, N.; Canals, P.; Capodiferro, M.; et al.
Article
In low-input farming systems, the availability of nutrients can limit yields as well as biological nitrogen fixation (BNF). The adaptability of legume species to soil fertility conditions may be relevant for designing crop rotations. The aim of this study was to determine the effect of soil fertility on biological N fixation of two annual legumes (...
Article
Soil organic matter (SOM) is sensitive to land use and to physico-chemical soil properties as well soil microbial communities controlling SOM stabilization. Our study aimed at exploring how carbonates of Mediterranean soils – known to stabilize SOM by enhancing soil aggregation and binding SOM by calcium – are affecting SOM and microbial communitie...
Article
Full-text available
Verticillium Wilt of Olive, a disease caused by the hemibiotrophic vascular fungus Verticillium dahliae Kleb. presents one of the most important constraints to olive production in the world, with an especially notable impact in Mediterranean agriculture. This study evaluates the use of RGB vegetation indexes in assessing the effects of this disease...
Article
Full-text available
Background and Aims Verticillium wilt, caused by the soil-borne pathogenic fungus Verticillium dahliae (Kleb), is one of the most severe diseases of olive trees in Mediterranean agriculture. At present, the use of organic amendments is considered an effective means to combat certain soil-borne plant diseases while in turn supplying plants with nutr...
Technical Report
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L’escassetat de bestiar ecològic que tenim actualment a Catalunya i la seva distribució desigual pel territori fan difícil trobar fonts de matèria orgànica ecològiques per ser aplicades en la producció ecològica. Per tal de pal·liar la manca de matèria orgànica d’origen ecològic que sovint es dóna arreu, la normativa de producció ecològica preveu l...
Technical Report
Full-text available
L’escassetat de bestiar ecològic que tenim actualment a Catalunya i la seva distribució desigual pel territori fan difícil trobar fonts de matèria orgànica ecològiques per ser aplicades en la producció ecològica. Per tal de pal·liar la manca de matèria orgànica d’origen ecològic que sovint es dóna arreu, la normativa de producció ecològica preveu l...
Technical Report
Full-text available
A partir d’analítiques de diverses explotacions catalanes s’ha volgut valorar les diferències entre fems frescos i compostats, i dins dels compostats, entre fems de diferent tipus de bestiar, comparant-los també amb el compost de FORM (fracció orgànica de residus municipals). L’aplicabilitat dels fems en Agricultura Ecològica es basa amb la seva tr...
Article
Full-text available
Sugarcane filtercake is a nutrient-rich residue produced prior to sugarcane distillation and is commonly disposed of by applying directly to agricultural fields, often causing high decomposition and leaching rates. Transforming this material into biochar could improve its stability in the soil. In this 92-day incubation study, filtercake biochar pr...
Article
Conservation agriculture and organic farming are two alternative strategies that aim to improve soil quality and fertility in arable cropping systems through reducing tillage intensity, maintaining soil cover and increasing nutrient recycling, using farmyard and green manures. However, these practices can increase weed infestation or decrease nutri...
Data
The following document presents the CARBOSOL Database that gathers data of physical and chemical properties of 6,609 georeferenced soil profiles in Spain associated to a related analytical dataset of 22,100 horizons compiled from 635 soil studies. The CARBOSOL Database provides a wealth of information on soil organic matter content, its distributio...
Conference Paper
Full-text available
El 2005 es va iniciar el projecte de transició agroecològica del Parc de l’Espai d’Interès Natural de Gallecs amb la intenció de potenciar els valors econòmics, ecològics i socials d’aquesta àrea rural periurbana sota la direcció del Consorci de Gallecs, l’activa participació de l’Associació Agroecològica de Gallecs i el suport científic i tècnic d...
Technical Report
Full-text available
Els composts poden ser utilitzats com a substrats de producció de planta o com a esmenes per millorar les terres de cultiu. L’ús de compost pot millorar la fertilitat i alhora afavorir el control biològic de les malalties edàfiques. En aquest treball presentem les propietats fertilitzants i la capacitat supressora contra Fusarium oxysporum f.sp. ly...
Article
Organic farming systems often show negative nutrient balances that may compromise the availability of phosphorus over the mid-term. Calcareous soils with low organic matter generally show low or very low phosphorus availability. Under these conditions, P retained in soil organo-mineral complexes -either in organic or inorganic forms-after its solub...
Chapter
Full-text available
Mountain grasslands are generally rich in soil organic C, but the typical high spatial variability of mountain environments, together with the different management systems, makes their soil C content particularly variable. Socio-economic changes of the past decades have caused a progressive abandonment of the traditional use for grazing of some are...
Conference Paper
Full-text available
CARBOSOL is a collaborative network of 8 research teams from Spanish Universities and Research Centres focused on the study of soil organic matter and the Global Carbon Cycle. Our aim is to perform an accurate quantitation of Soil Organic Carbon (SOC) stocks in Spain for different land uses, soil types and depths, and assess the environmental drive...
Article
Full-text available
Given their organic matter (OM) depletion, agricultural soils can act as carbon (C) sinks if adequate management practices are implemented. Organic matter stabilisation in highly OM-depleted agricultural soils may depend upon the allocation of OM inputs among particle size fractions that differ in their capacity to stabilise OM. In a set of vegetab...
Article
Full-text available
Background and Aims The post-fire mineral N pool is relevant for plant regrowth. Depending on the plant regeneration strategies, this pool can be readily used or lost from the plant–soil system. Here we studied the retention of the post-fire mineral N pool in the system over a period of 12 years in three contrasted Mediterranean plant communities....
Article
Full-text available
Aims Shrub encroachment in mesic grasslands alters the identity and quality of litters entering the system. As litter from shrubs and grasses can differ in their quality, this can lead to differences in litter decomposition by the direct effect of quality, but also to litter interaction during decomposition. The objective of this study was to exami...
Article
Full-text available
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Article
The use of composted manures and of legumes in crop rotations may control the quality and quantity of soil organic matter and may affect nutrient retention and recycling. We studied soil organic C and N stocks and N mineralization in organically and conventionally managed dryland arable soils. We selected 13 extensive organic fields managed organic...
Article
Wildfires affect soil organic matter (SOM), mainly resulting in losses of the most labile fractions (in particular carbohydrates), an increased abundance of recalcitrant fractions and, specifically, an increase in SOM aromaticity. Most of these effects have been studied in laboratory experiments: under field conditions, post-fire recovery of the ve...
Article
Given the high turnover of fine roots in mountain grasslands, knowledge of their decomposition rates and the capacity of mountain grassland soils to stabilize root-derived C are central to understand the role of these ecosystems as potential C sinks. Here we studied the decomposition of fine roots in mountain grasslands and estimated the rates at w...
Article
Se determinó la disponibilidad de nitrógeno en cultivos herbáceos extensivos, en formas de NO3-, NH4+ y NPM (nitrógeno potencialmente mineralizable), en la zona de Huesca (España). En los sistemas agrícolas convencionales se realiza un mayor aporte de nitrógeno (N) que en los ecológicos; en estos, por otro lado, el aporte de materia orgánica es muc...
Chapter
Full-text available
The Mediterranean region can be considered as a transitional zone between sub-tropical and temperate climates, characterized by dry, hot summers and mild, wet winters. According to the FAO database the prevailing soil type in the Mediterranean region are Cambisols however Fluvisols, Luvisols and Leptosols are also quite common. In order to quantify...
Article
Low soil organic carbon (SOC) levels in dry areas can affect soil functions and may thus indicate soil degradation. This study assesses the significance of SOC content in Mediterranean arable soils based on the analysis of a broad data set of 2613 soils sampled from Mediterranean grasslands and agricultural land. The distribution in values of SOC,...
Article
Full-text available
Forest areas have increased in the Mediterranean basin over the last two decades, due to the abandonment of agriculture. This and the occurrence of intense drought periods have led to an increase in the frequency and intensity of fires. Fire and drought can increase short-term soil organic C accumulation as a result of increased plant residues. In...
Article
Full-text available
Given the importance of root dynamics for soil C storage, the aim of this study was to analyze first the seasonal dynamics of belowground productivity and then the short-term effects of grazing exclosure on root dynamics in mountain grasslands. Soil coring and root ingrowth cores were used to assess belowground biomass (BGB) and productivity in gra...
Article
Because root turnover represents the major source for building up soil organic matter in ecosystems with high belowground allocation, like grasslands, sensitive analyses on root decomposition rates may contribute to point out the effect of grazing abandonment on soil C and N dynamics. The objective was to detect changes in root C and N mineralizati...
Article
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We measured plant and soil carbon (C) storage following canopy-replacing wildfires in woodlands of northeastern Spain that include an understory of shrubs dominated by Quercus coccifera and an overstory of Pinus halepensis trees. Established plant succession models predict rapid shrub recovery in these ecosystems, and we build on this model by cont...
Article
Full-text available
Soil organic carbon (C) is a complex set of pools, and to understand its dynamics it is necessary to know which of these pools are active at a given moment, and which act as passive, due to either physical protection or biochemical recalcitrance, or both. This matter has been studied mainly in agricultural soils. For forest soils, especially in Med...
Article
Full-text available
Shrub encroachment into grasslands is ubiquitous but its impact on soil organic C (SOC) remains unclear. In previous work we had observed that shrub encroachment into mesic mountain grasslands increased SOC content. Here we sought the mechanisms of this increase. To this end, we assessed aboveground and belowground production for a conifer shrub (J...
Article
In low input farming systems the reserves of organic and inorganic P may be a significant source of P to crops. To clarify this we investigated organic and inorganic P reserves in an array of irrigated and rain-fed calcareous soils of grassy crops, with long term organic or conventional farming practices. Organic P (Po) reserves appeared to be more...
Chapter
Forest fires can have a major impact on nutrient cycling, with significant consequences for many other important ecosystem processes. The critical cycling fraction of nutrients is affected by fire in a number of ways: 1) By loss of nutrients during and after fires. Nutrient losses may be either direct (gaseous and particulate during combustion) or...
Article
Although a large amount of soil carbon (C) is stored in subsurface soils, most studies on soil C dynamics focus on the upper layers. The aim of this study is to assess the factors that regulate C mineralization in mountain grassland soils under standard laboratory conditions to compare regulation mechanisms at surface and subsurface horizons. For t...
Article
Full-text available
A number of biological and chemical processes may affect soil phosphorus availability when forest fires occur, partly as a result of heating. We describe here a laboratory experiment to study the effects of soil heating on changes in sorption and desorption of P. Autoclaving was also included as an additional treatment of moist heating under pressu...
Article
The Kyoto Protocol explicitly allows the storage of carbon (C) in ecosystems resulting from afforestation to be offset against a nation's carbon emissions and paves the way for carbon storage in soils to be eligible as carbon offsets in the future. More information is required about how afforestation affects carbon storage, especially in the soil....
Conference Paper
Full-text available
The use of manures and rotation with legumes in organic farming systems does not always guarantee the adequate nutrient supply to crops. We studied post-harvest N availability in a series of Mediterranean semi-arid rain-fed and irrigated organic fields after 18 years of conversion and compared these with conventional fields nearby. In organic irrig...
Article
Full-text available
Degradation of soil quality is a major concern due to the scarcity of fertile land, and needs to be properly addressed in the environmental assessment of agro-forestry systems. This paper addresses the main issues arising in assessing the impacts of fertile land use on “Life Support Functions” in Life Cycle Assessment (LCA). These issues include th...
Article
The availability of organic fertilisers plays a major role in organic farming systems. Such systems exclude the use of synthetic fertilisers, whilst aiming to optimise internal nutrient cycling. The low availability of manures, particularly in dry areas, can lead to negative nutrient balances in many organic farming systems. Such negative nutrient...
Article
Full-text available
The prediction of soil C stocks across the landscape has been increasingly studied in many areas of the world. Soil organic C storage in mountain areas is highly heterogeneous, mainly as a result of local-scale variability in the soil environment (topography, stoniness, parent material) and microclimate. The aims of the present study are to estimat...
Article
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The Mediterranean region has distinct characteris-tics resulting from its climate, land use history and landforms that may largely affect soil C balances. In this paper we present data on C storage in Mediterranean soils and how it can be affected by changes in land use and fire. We also discuss the sensitivity of organic matter levels in Mediter-r...
Article
Full-text available
Análisis del carbono en los suelos agrícolas de España. Aspectos relevantes en relación a la reconversión a la agricultura ecológica en el ámbito mediterráneo. Los niveles de carbono orgánico en suelos agrícolas son especialmente relevantes en los modelos de gestión que se basan en la reserva orgánica de nutrientes. La disminución de materia orgáni...
Article
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The forest floor needle mass and the decomposition rates of pine needle litter in a European climate transect were studied in order to estimate the impact of climate change on forest soil carbon sequestration. Eight pine forests preserved from fire were selected along a climatic latitudinal gradient from 40° to 60°N, from Spain and Portugal to Swed...
Article
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The present work investigates the distribution of heavy metals accumulating in three soils from the Mediterranean region (loamy-basic soil, clay-basic soil and loamy-acid soil). These soils were treated (a) with biosolids (LMB), (b) with metal-enriched biosolids (MEB), and (c) without biosolids (controls). Biosolids were thoroughly mixed with soils...
Article
In Mediterranean dry and semiarid areas, soil organic matter is often depleted due to ancient and intensive human activity. Under these conditions the use of sewage sludge as a land reclamation technique may be a means to revert desertification processes and to enhance soil function and nutrient cycling. However, applications of heavy metal-contami...
Conference Paper
Full-text available
Soil provides a list of services to all users of terrestrial ecosystems and is crucial to our agricultural societies. From an anthropogenic point of view, soil quality may be then measured in terms of the services the soil provides to our society. The value of soil services to human societies has changed during history and thus the value we give to...
Article
Full-text available
Soil provides a list of services to all users of terrestrial ecosystems and is crucial to our agricultural societies. From an anthropogenic point of view, soil quality may be then measured in terms of the services the soil provides to our society. The value of soil services to human societies has changed during history and thus the value we give to...
Article
Full-text available
The evergreen Nothofagus betuloides and deciduous Nothofagus pumilio live close together in Tierra del Fuego. The fact that these two species rarely form mixed forests suggests that the soil factor can contribute to the distribution of two species on a local scale. Most of these forests are undisturbed; therefore, soil characteristics may reflect b...
Article
Fires may greatly alter the N budget of a plant community. During fire nitrogen is lost to the atmosphere. Although high light availability after fire promotes N2-fixation, the presumably high soil N availability could limit N2-fixation activity. The latter limitation might be particularly acute in legume seedlings compared with resprouts, which ha...
Conference Paper
Full-text available
Grassland ecosystems can constitute a source or a sink in the global C balance, and their management affect their position in that balance. We aim to assess soil organic carbon (SOC) content and determine how grazing affects C fluxes and stocks in grasslands at high altitude in the Pyrenees. In a preliminary survey we found that total SOC ranges fr...
Article
Accumulation of soil carbon is mainly controlled by the balance between litter production and litter decomposition. Usually In Mediterranean forests there are contrasting conditions in the distribution of faunal activity and the moss layer that may have different effects on litter decomposition. Decomposition and faunal activity were studied by exp...
Article
Pinus radiata D. Don is planted in Spain, in a wide range of soils and climatic conditions. We aimed to identify the main site factors that control the productivity of this species and determine to what extent its growth is limited by the soil quality and the climate. For this purpose, we selected 22 stands of P. radiata on the basis of parent mate...
Article
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[1] Field-chamber measurements of soil respiration from 17 different forest and shrubland sites in Europe and North America were summarized and analyzed with the goal to develop a model describing seasonal, interannual and spatial variability of soil respiration as affected by water availability, temperature, and site properties. The analysis was p...
Article
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La comarca de l'Anoia pot resumir-se amb els elements biogeogràfics següents: • Altiplà segarrenc, eix de penetració nord-sud d'espècies eurosiberianes. • Serralada Prelitoral, eix nord-est, sud-est que inclou gran diversitat de comunitats. • Riu Anoia, perpendicular, important connector entre els sistemes litorals i la depressió central. Partint d...