Roland Bol

Roland Bol
Forschungszentrum Jülich · Institute of Bio- and Geosciences (IBG)

Prof. Dr. (Ph.D Soil Science)

About

433
Publications
99,239
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16,698
Citations
Citations since 2016
210 Research Items
9642 Citations
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Introduction
Roland Bol currently works at the Institute of Bio- and Geosciences (IBG), Forschungszentrum Jülich, (Germany) and part-time at Environment Centre Wales, Bangor University, Wales. He is also visiting chair at Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam (Netherlands) and visiting Professor at Universidad Catolica del Norte, Antofagasta (Chile). Main research topics are Biogeochemistry, Soil Science and Environmental Science

Publications

Publications (433)
Article
Dissolved organic carbon (DOC) is both a potential source and stability indicator of soil organic carbon (SOC), and plays a pivotal role in global C cycling and sequestration. However, at a large scale, still not enough information is known about relations between DOC in soils and various controlling factors in natural forest ecosystems. We sampled...
Article
Full-text available
Deforestation can lead to an increase in the availability of nutrients in the soil and, in turn, have an impact on the quality of water in receiving water bodies. This study assesses the impact of deforestation by evaluating the in-stream concentrations of dissolved organic carbon (DOC) and nitrate, their internal relationship, and those with strea...
Article
Full-text available
Deforestation has a wide range of effects on hydrological and geochemical processes. Dissolved organic carbon (DOC) dynamics, a sensitive environmental change indicator, is expected to be affected by deforestation, with changes in atmospheric sulfur (S) deposition compounding this. However, how precisely anthropogenic disturbance (deforestation) un...
Article
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Replanting of mining soils is necessary for utilizing soil resources and increasing cultivated land areas. However, limited information exists on the long-term temporal trends of carbon accrual in agricultural systems containing carbonate-rich soil material. We examined changes in soil organic carbon (SOC), soil inorganic carbon (SIC), and total ca...
Article
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The global surplus of reactive nitrogen (Nr) and elevated atmospheric CO2 are both major threats to current and future ecosystem integrity. Denitrification is the primary sink for Nr by the conversion to inert N2 and is also the predominant source of N2O emission. Yet, it is unclear how and to what extent soil denitrification would respond to eleva...
Article
Topography features within catchments influence soil properties, nutrient status, microbial dynamics and ultimately enzyme activities. Extracellular soil enzymes are essential for the decomposition of organic substrates and play a central role in global biogeochemical cycles. How topography and soil properties drive the spatial expression of enzyme...
Article
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Anthropogenic activities have increased atmospheric N, precipitation, and temperature events in terrestrial ecosystems globally, with N deposition increasing by 3-to 5-fold during the previous century. Despite decades of scientific research, no consensus has been achieved on the impact of climate conditions on soil respiration (Rs). Here, we recons...
Article
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Hydrological processes are known as major driving forces in structuring wetland plant communities, but the specific relationships are not always well understood. The recent dry conditions of Poyang Lake (i.e., the largest freshwater lake in China) are having a profound impact on its wetland vegetation, leading to the degradation of the entire wetla...
Article
The forest ecosystem plays a key role in mitigating global climate change through carbon sequestration in its biomass and soils to limit the rising atmospheric concentration of CO2. However, the combined overall interaction of climate and forest type on the quantities and forms of soil carbon (organic vs. inorganic) has not yet been sufficiently in...
Article
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Peatlands, which play a vital role in the global storage of carbon (C) and nitrogen (N), have been artificially drained worldwide over the last few decades. However, the effects of long-term artificial drainage on the soil N cycle and subsequent potent greenhouse gas emissions in peatland soils are not fully understood. In this study, we investigat...
Article
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Purpose Phosphorus (P) is a limiting nutrient in many managed forests. To further understand the risks and benefits of biochars as sustainable P source in forest management, an improved mechanistic understanding of its interactions in root systems is required. Methods A rhizobox experiment was conducted to observe root response of P. sylvestris (S...
Article
Biochar is rapidly gaining worldwide interest as an agro-technology for increasing soil health and carbon storage. This study investigated the physicochemical characteristics and impact on soil microbes of biochar amendments from three feedstock sources: date palm leaves (D), mesquite plants (M) and sludge compost (S.C.); pyrolyzed at 450 ℃, 600 ℃...
Article
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The stable nitrogen isotope ( ¹⁵ N) analysis of ammonium (NH 4 ⁺ ) and nitrate (NO 3 – ) is widely used in ecological research, providing insights into N cycling and its underlying regulating mechanisms in both aquatic and terrestrial ecosystems. To date, a large number of methods have been developed for the preparation and measurement of ¹⁵ N abun...
Article
Engineered nanoparticles (ENPs) released into the environment can affect phosphate (Pi) availability in soils. In this study, we evaluated the effect of silver (Ag) or copper (Cu) ENPs (3 and 5%, w/w) on Pi sorption processes in soil particle size fractions. The 2000–32 μm, 32–2 μm, and < 2 μm fractions were obtained from an agricultural volcanic s...
Article
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Soil nutrient pools in the dry low Arctic are likely to be released under climatic change and this bioavailability has the potential to increase both terrestrial and aquatic productions. As well as the direct effect of warming, external disturbances such as nutrient deposition and grazing can also drive ecosystem change. This study in the low Arcti...
Article
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The impacts of waste management on various soils of agricultural and urban lands may last centuries or even millennia; however, generally, most studies tend to focus only on decadal or shorter timescales. This study investigates the characteristic properties of anthrosols in and around the urban settlement of St Andrews (Scotland), in the context o...
Article
The accurate quantification and source partitioning of CO 2 emitted from carbonate (i.e., Haplustalf) and non-carbonate (i.e., Hapludult) soils are critically important for understanding terrestrial carbon (C) cycling. The two main methods to capture CO 2 released from soils are the alkali trap method and the direct gas sampling method. A 25-d labo...
Article
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The natural carbon dioxide (CO2) emission from the ecosystem, also termed as the ecosystem respiration (Reco), is the primary natural source of atmospheric CO2. The contemporary models rely on empirical functions to represent decomposition of litter with multiple soil carbon pools decaying at different rates in estimating Reco variations and its pa...
Article
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Background Leaching from agricultural land is one of the major pathways of phosphorus (P) loss from soils to waterbody and may induce adverse effect on territorial environment. Past studies usually focused on the loss of inorganic P (P I ) while ignored the role of organic P (P O ) in leaching process. A total of 63 agricultural soil samples were c...
Article
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Soil net nitrogen mineralization (Nt) is crucial for nitrogen availability and ecosystem productivity. However, the patterns and drivers of Nt remain unclear under different management practices. We examined the biotic and abiotic determinants of Nt, using 11 treatments in Northern China Fluvo‐aquic soil under wheat‐maize rotation. Biotic propertie...
Conference Paper
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Soil formation under hyperaridity is governed by the limited availability of water, biotic activity, and unfavourable soil properties, which results in a group of taxa subsumed under Aridisols according to the USDA soil taxonomy. In the Atacama Desert, previous investigations have focussed on the hyperarid core of the desert, describing and identif...
Article
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Understanding the physicochemical factors affecting nanoparticle transport in porous media is critical for their environmental application. Water-saturated column experiments were conducted to investigate the effects of input concentration (Co), ionic strength (IS), and sand grain size on the transport of poly(acrylic acid-co-maleic acid) coated ma...
Article
Soil carbon (C) sequestration plays a vital role in mitigating global climate change. Human activities have vastly increased nitrogen (N) deposition rate in China, which in turn influences belowground C cycle processes. We performed a meta-analysis based on 61 published studies on N addition experiments, including 4072 observations across China, to...
Article
Soil carbon (C) sequestration plays a vital role in mitigating global climate change. Human activities have vastly increased nitrogen (N) deposition rate in China, which in turn influences belowground C cycle processes. We performed a meta-analysis based on 61 published studies on N addition experiments, including 4072 observations across China, to...
Article
Wind erosion is a serious environmental threat. However, for Northern Africa estimates or predictions of the wind erodible fraction (WEF) in arid soils are rare. This study was conducted to (i) compare the flat sieve (WEFfs) and the Fryrear equation (WEFc) in order to estimate WEF (ii) fuse the directly measured WEFfs values to other measured soil...
Article
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Fairy rings promoting circular greening belts in the vegetation can shape soil microbial communities by altering soil conditions. Knowledge about soil variables involved in this process is incomplete. We characterized soil microbial communities of six fairy rings by phospholipid fatty acid (PLFA) profiling in a montane grassland, and studied if cha...
Article
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Soil organic matter plays an important role in improving soil properties, crop productivity and is a key constituent and driver of the global carbon cycle. Nevertheless, relatively limited quantitative information is available on the organic carbon (OC) stocks and the actual potentials for OC and total nitrogen (N) sequestration under arid cropping...
Article
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Home-field advantage (HFA) encompasses all the processes leading to faster litter decomposition in the ‘home’ environment compared to that of ‘away’ environments. To determine the occurrence of HFA in a forest and adjacent clear-cut, we set up a reciprocal litter decomposition experiment within the forest and clear-cut for two soil types (Cambisols...
Chapter
Soil organic matter (OM) plays an important role in determining soil functionality and fertility, not only directly, by contributing to the pool of plant available elements, but also through important interactions with nutrient cycling. In this chapter, we will focus on the interaction between the cycling of OM and the major nutrients, namely nitro...
Article
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The extreme environmental conditions and lack of water on the soil surface in hyperarid deserts hamper microbial life, allowing only highly specialized microbial communities to the establish colonies and survive. Until now, the microbial communities that inhabit or have inhabited soils of hyperarid environments at greater depths have been poorly st...
Preprint
Home-field advantage (HFA) encompasses all the processes leading to faster litter decomposition in the 'home' environment as compared to that of ‘away’ environments. To determine the occurrence of HFA in a forest and adjacent clear-cut, we set up a reciprocal litter decomposition experiment within the forest and clear-cut for two soil types (Cambis...
Chapter
A field study was carried out during the years 2014, 2015 and 2016 on 30-year-old Deglet Nour cultivar trees growing in sandy soil in oasis of Fatnassa (Tunisia). Organic fertilizer originated from farm manure (F) and mineral amendment bentonite (B) were applied into sandy soils (S). Farm manure was applied either singly (SF) or in combination with...
Article
The rare Pacific coast fog ecosystems are under threat by climate change and local factors. Although coastal fog is known to affect soil properties and microbial diversity, few studies on the Pacific coast have examined the specific microbiomes associated with these ecosystems. We evaluated the effects of coastal fog on the physicochemical, mineral...
Article
The Atacama Desert is one of the driest and oldest deserts on Earth. The extreme scarcity of rainfall and hence very limited runoff, paired with endorheism, allow sediments and deposited materials to largely remain in the pedosphere and for long periods of time, thereby leading to the generation of thick sediment, salt, and soil deposits. Aerosols...
Article
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Physical erosion and chemical weathering rates beneath glaciers are expected to increase in a warming climate with enhanced melting but are poorly constrained. We present a global dataset of cations in meltwaters of 77 glaciers, including new data from 19 Asian glaciers. Our study shows that contemporary cation denudation rates (CDRs) beneath glaci...
Article
The application of phosphorus (P) fertilizers inevitably contributes to the accumulation of trace elements, such as uranium (U), in agricultural soils. The fertilizer-derived U accumulation was first reported in Rothamsted Research in 1979. In the present study, we expand this key early research by evaluating the fertilizer-derived U accumulation i...
Chapter
More than half of Tunisian soil is composed of Lithosols and Regosols. These soils, despite their existence in dry climates, are either steppes or farmland. The present work focuses on the state of the carbon stock in the Regosols of Tunisia. Two areas are selected for this study: a Regosol in Gafsa (S1) under arid climate, and another Regosol in K...
Article
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Denitrification is one of the most important biological process by which reactive N is removed in the biosphere, but the responses of potential denitrification activity (PDA) and associated gene abundances to long-term N fertilization are poorly understood. We compiled data from 1041 observations across 62 studies and quantified the effects of long...
Preprint
Full-text available
Purpose Phosphorus (P) is a limiting nutrient in many managed forests. To further understand the risks and benefits of biochar as a sustainable P source in forest management, an improved mechanistic understanding of its interactions in root systems is required. Methods A rhizobox experiment was conducted to observe root response of P. sylvestris (S...
Article
Full-text available
To unequivocally discover the actual presence of life or even of near surface liquid water on extraterrestrial planetary bodies would be a key scientific breakthrough for humankind. For this reason, studying similar environments on Earth is essential to understanding the processes shaping such extraterrestrial objects. The Yungay area in the Chilea...
Article
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Phenolic compounds are chemical precursor building blocks of soil organic matter. Their occurrence can be inhibitory to certain enzymes present in soil, thereby influencing the rate of decomposition of soil organic matter. Microbe-derived phenoloxidases (laccases) are extracellular enzymes capable of degrading recalcitrant polyphenolic compounds. I...
Article
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In this study, we developed a novel model approach to compute the spatio-temporal distribution patterns of rhizodeposits around growing root systems in three dimensions. This model approach allows us to study the evolution of rhizodeposition patterns around complex three-dimensional root systems. Root systems were generated using the root architect...
Article
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Straw incorporation is an effective measure for increasing soil organic carbon (SOC) thereby improving soil quality and crop productivity. However, quantitative assessments of the transformation and distribution of exogenous carbon (C) in soil aggregates under various field fertilization practices have been lacking. In this study, we collected tops...
Article
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Amazonian Dark Earths (or terra preta de índico) are known as highly fertile soils that can maintain elevated crop yields for centuries. While this fertility was frequently ascribed to the presence of black carbon, the availability and colloidal binding of major nutrients received limited attention. We examined the size distribution and the element...
Article
The Atacama Desert (Chile) is one of driest places on Earth, with a hyper-arid climate and less than 2mm yr⁻¹ precipitation; nevertheless, it has experienced rare periods of sporadic rainfall. These periods shortly enhanced vegetation growth and microbial activity, which must have utilized major nutrients such as phosphorus (P). However, any biolog...
Article
Straw residue amendment and fertilization are the key global management strategies for achieving more sustainable agriculture. However, the temporal changes in labile soil organic carbon (SOC) fractions and microbial community (MB) in response to differential long-term fertilization during straw residue decomposition remain unclear. We collected to...
Article
Citric acid exudation by plant roots is often linked to the mobilisation of recalcitrant soil phosphorus (P) for plant nutrition. In this case study, we have explored the effect of citric acid on the abundance, size and composition of water-dispersible soil colloids (WDC) to understand the mineral source of desorbed P and the chemical nature of P-c...
Article
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The goal of this work was to develop polymer-based heterocycle for water purification from toxic pesticides such as difenoconazole. The polymer chosen for this purpose was cellulose nanocrystalline (CNC); two cellulose based heterocycles were prepared by crosslinking with 2,6-pyridine dicarbonyl dichloride (Cell-X), and derivatizing with 2-furan ca...
Article
Currently, China has approximately four million hectares of intensively cultivated plastic-shed vegetable production , i.e., with excessive nitrogen (N) fertilization and high irrigation. Plastic-shed vegetable production has helped meet the rapidly increasing consumer demand for fresh vegetables while improving heat, light, and land utilization ef...
Article
Full-text available
Abstract Climate change affects the occurrence of high‐discharge (HD) events and associated nutrient exports in catchment stream water. Information on colloidal events‐based losses of important nutrients, such as organic C(Corg), N, P, and S, remain relatively scarce. We hypothesized that contributions of colloidal exported N, S, and P due to diffe...
Article
Full-text available
Date palm production contributes significantly to socio-economic development and food security in the dryland areas of Southern Tunisia. Soil degradation and nutrient depletion have dramatically increased in recent years. This is leading to a decline in date palm yields in these oases-based production systems. Locally derived bentonite clay has bee...
Article
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Agricultural land use covers almost half of the EU territory and reducing nutrient and pesticide losses to freshwaters is central to existing EU policy. However, the progress of improving freshwater quality and reducing eutrophication is slow and lags behind targets. The Green Deal is a key element of the EU plans to implement the United Nation's S...
Article
Nano and colloidal particles (1-1000 nm) play important roles in phosphorus (P) migration and loss from agricultural soils; however, little is known about their relative distribution in arable crop soils under varying agricultural geolandscapes at the regional scale. Surface soils (0-20 cm depth) were collected from 15 agricultural fields, includin...
Chapter
Full-text available
Three types of sands were mixed with manure and used as a soil amendment in oasis systems to compare their effect on the chemical properties (e.g. C, N, P and K content). Two of these sands were no-gypsum sands (NGS1, NGS2) while the other type was typical gypsum sand (GS). The results showed that all sands combined with manure improved soil C, N,...
Article
Full-text available
Engineered nanoparticles (ENPs) present in consumer products are being released into the agricultural systems. There is little information about the direct effect of ENPs on phosphorus (P) availability, which is an essential nutrient for crop growthnaturally occurring in agricultural soils. The present study examined the effect of 1, 3, and 5% dose...
Article
The hyperarid soils of the Atacama Desert, Chile, contain the largest known nitrate deposits in the world. They also represent one of the most hostile environments for microbial life anywhere in the terrestrial biosphere. Despite known for its extreme dryness, several heavy rainfall events causing localised flash flooding have struck Atacama Desert...