Feike A. Dijkstra

Feike A. Dijkstra
The University of Sydney · Sydney Institute of Agriculture

About

228
Publications
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Publications

Publications (228)
Article
Living roots and its rhizodeposition can stimulate or retard soil organic matter (SOM) decomposition via the rhizosphere priming effect (RPE). However, little is known about the RPE during non-growing seasons. In this study, we measured the RPEs of two perennial grasses (Elymus dahuricus, Stipa grandis) and two legumes (Medicago sativa, Melissilus...
Article
Almost half of global nitrogen (N) fertilizer is applied to rice, wheat and maize, but a large proportion is not directly taken up causing detrimental effects on the environment. To understand how fertilizer management, climate and soil factors influence N fertilizer use efficiency (REN) in these three crops, we conducted a meta-analysis with 3586...
Article
Full-text available
Purpose Belowground carbon (C) allocation for nitrogen (N) acquisition plays a crucial role in determining primary productivity and plant competitiveness in legume-grass mixtures, but beyond modeling and qualitative assessments, this remains poorly understood, especially with regard to drought stress and interspecific interactions. Methods We grew...
Article
The interactions of plastics and soil organisms are complex and inconsistent observations on the effects of plastics have been made in published studies. In this study, we assessed the effects of plastic exposure on plants, fauna and microbial communities, with a meta-analysis. Using a total of 2936 observations from 140 publications, we analysed h...
Article
Full-text available
Soil organic matter (SOM) plays a central role in the global carbon balance and in mitigating climate change. It will therefore be important to understand mechanisms of SOM decomposition and stabilisation. SOM stabilisation is controlled by biotic factors, such as the efficiency by which microbes use and produce organic compounds varying in chemist...
Article
Grassland plants allocate photosynthetically fixed carbon (C) belowground to root biomass and rhizodeposition, but also to support arbuscular mycorrhizal fungi (AMF). These C allocation pathways could increase nutrient scavenging, but also mining of nutrients through enhanced organic matter decomposition. While important for grassland ecosystem fun...
Chapter
The increasing production and use of conventional plastics, including in agricultural systems, has generated over 6500 million tonnes of plastic waste over the last 70 years. Over two–third of this waste had been deposited in landfills and natural environments including soils. However, the existence, persistence and impacts of plastics on soil prop...
Article
Full-text available
Photosynthetically derived carbon (C) is allocated belowground, allowing plants to obtain nutrients. However, less is known about the amount of nutrients acquired relative to the C allocated belowground, which is referred to as C efficiency for nutrient acquisition (CENA). Here, we examined how C efficiency for nitrogen (N) and phosphorus (P) acqui...
Article
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The return of crop residues to the soil is a common agricultural management practice for nutrient recycling and carbon sequestration. It is known that nitrogen (N) fertilization can influence crop residue decomposition and nutrient release. However, it is unclear whether the effect of N fertilization interact with plastic film mulching (PFM) or res...
Article
Full-text available
Background In a recent framework, Raven et al. New Phytologist 217: 1420-1427. (2018) considered carbon cost of acquiring phosphorus by mycorrhizal and non-mycorrhizal plants. Scope We broaden their conceptual framework by incorporating belowground carbon allocation for both nitrogen and phosphorus acquisition in conditions of nutrient co-limitati...
Article
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Root trait plasticity can facilitate plant adjustment to water shortages, but the impact of altered traits on belowground carbon (C) cycling is mostly unknown. While drought and nutrient availability can alter root morphological and chemical traits that may affect root decomposition, direct assessments of drought mediated changes on decomposability...
Article
Nitrogen (N) mineralization in soils generally controls biological N availability in terrestrial ecosystems. As the pivotal first step in the overall N mineralization process, gross N mineralization (GNM, defined as the production of ammonium from microbial mineralization of organic N) is inherently coupled with microbial mineralization of soil org...
Article
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Plain Language Summary Interactions between nitrogen (N) and phosphorus (P) are important for plant growth and carbon (C) sequestration. While effects of N supply on P dynamics have been much studied, much less is known about the opposite (P‐effect on N). We conducted a meta‐analysis by compiling a total of 1,734 individual experimental observation...
Article
Not only do soils provide 98.7% of the calories consumed by humans, they also provide numerous other functions upon which planetary survivability closely depends. However, our continuously increasing focus on soils for biomass provision (food, fiber, and energy) through intensive agriculture is rapidly degrading soils and diminishing their capacity...
Article
Soil nitrogen (N) availability is determined by microbial gross N mineralisation (GNM) and immobilisation, where net N mineralisation (NNM) represents their balance. Plants provide a substantial amount of their photosynthesized C belowground into the soil as rhizodeposition, which can stimulate microbial activity affecting GNM and NNM, but this act...
Conference Paper
Mitigating CH4 emissions from rice fields with minimizing the trade-offs between emission reduction and sustaining food security have raised global concerns. Here, a global meta-analysis using 1177 observations from 198 studies was conducted to assess changes in CH4 emission in response to different field management practices. The results revealed...
Article
Full-text available
Phosphorus (P) limitation is expected to increase due to nitrogen (N)-induced terrestrial eutrophication, although most soils contain large P pools immobilized in minerals (Pi ) and organic matter (Po ). Here we assessed whether transformations of these P pools can increase plant available pools alleviating P limitation under enhanced N availabilit...
Article
Increasing anthropogenic nitrogen (N) input has changed the global soil carbon (C) stock, yet the contribution of microbial necromass (amino sugars) to soil C with N addition is poorly understood. Here, we conducted a meta-analysis of 32 publications and evaluated the responses of microbial necromass to N addition. Our results showed that the overa...
Article
Full-text available
Nitrogen (N) fertilization and plastic film mulching (PFM) are two widely applied management practices for crop production. Both of them impact soil organic matter individually, but their interactive effects as well as the underlying mechanisms are unknown. Soils from a 28-year field experiment with maize monoculture under three levels of N fertili...
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AimsWe investigated whether plant resistance to soil impoverishment would depend on their flexibility in taking up nutrients and on maintaining elemental stoichiometry.Methods We mixed sand with grassland soil in mass proportions of 0, 10, 30, 50 and 70% to simulate soil impoverishment as caused by a gradient of desertification intensity and examin...
Article
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1. Re‐allocation of nutrients from roots to shoots is essential for plant regrowth in grasslands, particularly in nutrient‐poor conditions. However, the response of root nutrient re‐allocation to changes in nitrogen (N) and water availability remains largely unknown. 2. Using a novel 15N and 32P labelling technique, we quantified the contribution o...
Article
Full-text available
Plants spend a high proportion of their photosynthetically fixed carbon (C) belowground to support mycorrhizal associations in return for nutrients, but this C expenditure may decrease with increased soil nutrient availability. In this study, we assessed how the effects of nitrogen (N) fertiliser on specific root respiration (SRR) varied among myco...
Article
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Photosynthetic carbon (C) allocated below‐ground can be shared with mycorrhizal fungi in exchange for nutrients, but also added into soil as rhizodeposits that potentially increases plant nutrient supply by supporting microbial nutrient mineralization from organic matter. How water and nitrogen (N) availabilities affect plant C allocation to the rh...
Article
Plant litter inputs can influence soil organic carbon (SOC) decomposition via the priming effect. However, our understanding of the priming effect and underlying mechanisms is primarily from studies with leaf litter addition, while little is known about root litter effects, particularly of woody plants. Here, using a ¹³C natural tracer approach, we...
Conference Paper
Full-text available
Soil nitrogen (N) mineralisation is the conversion of organic into inorganic N by microbes, where net N mineralisation (NNM) represents the balance between gross N mineralisation (GNM) and microbial N immobilisation. Plants provide a substantial amount of their photosynthesised C belowground into the soil as rhizodeposition, which can stimulate mic...
Article
Due to limits in global phosphate rock reserves for fertilizer use, it is vital to increase phosphorus fertilizer use efficiency (PFUE) to maintain agricultural productivity and food security. With 865 observations from 82 papers we investigated how PFUE in cereal crops was affected by climate (mean annual temperature), soil (pH, texture, available...
Preprint
Full-text available
Globally, a large amount of methane (CH 4 ) emission is generated from agricultural systems including rice farming in many Asian countries including Bangladesh. However, a reliable estimate of CH 4 emission from rice cultivation is not available, particularly considering the different rice types ( i.e. , local land races, high yielding varieties (H...
Article
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Biochar, a form of porous pyrogenic carbon, has been shown to influence soil physicochemical properties and increase crop yield. However, it is unclear whether biochar application at different rates will improve crop performance in a clay soil under drought conditions through increasing plant water uptake. Here, we examined performance of soybean a...
Article
Biocides have been frequently used to understand the roles of fungi and bacteria on soil carbon (C) and nitrogen (N) cycling. However, addition of biocides to soil can result in unwanted temporary increases in C and N supply to surviving microbes due to a pulse in microbial necromass, and where biocides can directly be used as sources of C and N. W...
Article
Drought causes alterations in the abundance of fungi and bacteria in soil, which could affect community level microbial carbon use efficiency (CUE) and the capacity to store C in soil. We examined drought effects (implemented with rainout shelters) on microbial community composition, enzyme activity, and CUE during a dry summer and wet winter in a...
Article
Tree roots and their associated microbes can significantly influence soil organic matter (SOM) decomposition, i.e., the rhizosphere priming effect. This effect is expected to be greater in trees associated with arbuscular mycorrhizal (AM) fungi, which produce higher extracellular enzymes especially surrounding hyphae, than in trees associated with...
Article
Decomposition of soil organic matter by microorganisms is a fundamental mechanism driving the terrestrial carbon (C) cycle. Microbial C use efficiency (CUE), microbial biomass residence time (MRT), and soil C temperature sensitivity (Q10) co-determine the fate of soil C in a changing climate. In order to reveal the effect of soil depth and varying...
Article
From recent developments on how roots affect soil organic carbon (SOC) an apparent paradox has emerged where roots drive SOC stabilization causing SOC accrual, but also SOC destabilization causing SOC loss. We synthesize current results and propose the new Rhizo-Engine framework consisting of two linked components: microbial turnover and the soil p...
Article
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Aims Soil aggregates constitute spatially-separated microbial habitats and architectural units for biogeochemical reactions. However, little is known about how aggregates varying in size can affect soil carbon (C) storage and mediate the direction of plant-soil interactions. Methods In a meadow steppe, we assessed soil aggregate C storage affected...
Article
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Rhizodeposition plays an important role in below‐ground carbon (C) cycling. However, quantification of rhizodeposition in intact plant–soil systems has remained elusive due to methodological issues. We used a 13C‐CO2 pulse‐labelling method to quantify the contribution of rhizodeposition to below‐ground respiration. Intact plant–soil cores were take...
Article
Woody plant roots can be classified into absorptive roots and transport roots based on root functions, order and traits. While there is an emerging view that living roots actively affect soil organic carbon (SOC) decomposition via the rhizosphere priming effect (RPE), the linkages of the RPE with C allocation to absorptive roots (relative to total...
Article
Biochar amendment causes immediate increases in soil organic carbon (SOC), but long-term effects are unclear. Biochar properties change with time (biochar aging) potentially affecting how efficiently SOC remains in soil after decomposition, indicated by microbial carbon use efficiency (CUE, the ratio of microbial growth over carbon uptake). Effects...
Article
Live roots can stimulate microbial soil organic matter (SOM) decomposition and nutrient cycling, which is termed as the rhizosphere priming effect (RPE). Compared to nitrogen (N) availability, fewer studies have focused on the effect of phosphorus (P) availability on the RPE. Here we investigated the RPEs of ryegrass (Lolium perenne) and clover (Tr...
Article
Full-text available
Drought can increase nitrogen (N) loss due to enhanced asynchronicity between N release through mineralization and plant N uptake. Organic amendments of N could potentially mitigate this loss where the N is more slowly released and made available at times when plants need it. Drought (ambient vs. reduced precipitation implemented with rainout shelt...
Article
Fungi are critical for carbon (C) and nitrogen (N) dynamics in forest soils, but much less is known about their activity in grassland soils. Here we examined how fungal activity affected C and N cycling in a grassland soil with and without litter and N addition. Soil from a semi-natural grassland was amended with and without a fungicide (cyclohexim...
Article
Full-text available
Background and aimsThrough agriculture and industry, humans are increasing the deposition and availability of nitrogen (N) in ecosystems worldwide. Carbon (C) isotope tracers provide useful insights into soil C dynamics, as they allow to study soil C pools of different ages. We evaluated to what extent N enrichment affects soil C dynamics in experi...
Article
Root activity may alter the temperature sensitivity (Q10) of soil respiration. However, we lack a comprehensive understanding of root effects on Q10 across different climatic regions and ecosystem types. Here, we conducted a global synthesis of 87 observations of Q10 values of soil respiration and its components from 40 published studies. We found...
Article
Root activity may alter the temperature sensitivity (Q10) of soil respiration. However, we lack a comprehensive understanding of root effects on Q10 across different climatic regions and ecosystem types. Here, we conducted a global synthesis of 87 observations of Q10 values of soil respiration and its components from 40 published studies. We found...
Chapter
Biological organisms including humans require mineral nutrients for their growth and development. A significant amount of these nutrients remain unused in the left over materials, known as waste, causing environmental degradation. These nutrients could potentially be a resource for agriculture if recycled and reused. Therefore, a critical examinati...
Article
Soil microorganisms affect both the formation and decomposition of soil organic carbon (SOC). We investigated how nitrogen (N, 25 vs. 100 kg N ha⁻¹) and phosphorus (P, 10 vs. 40 kg P ha⁻¹) fertilisation influenced microbial C use efficiency (CUE) and turnover rate in soil planted with two wheat genotypes, and to what degree these parameters were as...
Article
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Aims Here we assessed N and P uptake of four grassland species grown together in response to a short-term drought event along a soil P gradient. Methods We used ¹⁵N and ³²P tracers to examine uptake of N and P by the grasses Bothriochloa macra, Themeda triandra, Lolium perenne and Microlaena stipoides grown together in pots with initial available...
Article
Full-text available
The change in native soil organic carbon (SOC) decomposition caused by plant roots or the rhizosphere priming effect (RPE) is a common phenomenon. Although most of the SOC is stored in aggregates with different size classes, the RPE in aggregates and the underlying mechanisms remain unclear. In a 35‐d pot experiment, we grew Agropyron cristatum (C3...
Article
Changes in soil carbon (C): nitrogen (N): phosphorus (P) stoichiometric ratios have significant influences on biogeochemical cycles and ecosystem functions. Soil C, N, and P dynamics are closely related to climatic aridity and soil texture, two factors that are not easily separated at large spatial scale due to their geographic co-variation. While...
Article
Full-text available
Here we investigated the effects of P compounds (KH2PO4 and Ca(H2PO4)2) with different addition rates of 0, 20, 40, 60, 80, and 100 kg P ha−1 yr−1 and NH4NO3 addition (0 and 100 kg N ha−1 yr−1) on soil labile inorganic phosphorus (IP) (dicalcium phosphate, Ca2-P), moderate-cycling IP, and recalcitrant IP fractions in a calcareous grassland of north...
Article
Full-text available
Background and aims Variations in plant nitrogen (N) and phosphorus (P) concentrations and ratios have great implications for primary productivity and nutrient cycling. Here, we reported their changes at functional group and community levels along an aridity gradient. Methods We carried out a field investigation and set up 26 sampling sites along...
Article
Full-text available
Aims Determining base cation and trace element dynamics in plant-soil systems is important for sustainable utilization of grasslands affected by global ecosystem nitrogen (N) enrichment. Methods A 4-year field experiment was conducted with urea addition rates of 0, 2.5, 5, 7.5, 10, 15, 20, and 30 g N m⁻² yr.⁻¹ to investigate the dynamics of base c...
Article
Lime is a common amendment to overcome soil acidity in agricultural production systems. However, plant root effects on lime and soil carbon (C) dynamics in acidic soils under varied temperature remain largely unknown. We monitored root effects of soybean on the fate of lime applied to an acidic soil at 20 and 30°C in growth chambers. Soil respired...
Article
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Increased inputs of ecosystem nitrogen (N) and phosphorus (P) may affect the activity of soil enzymes that play essential roles in the metabolization of carbon
Article
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Soil amendment with biochar is shown to be a low-cost carbon sequestration option while its properties contribute to nutrient dynamics. The properties of biochar can be purposely modified using different techniques including chemical oxidation. A change in biochar functionality, to an equivalent state of natural aging, could alter plant nutrient us...
Article
Full-text available
Here we investigated the effects of P compounds (KH2PO4 and Ca(H2PO4)2) with different addition rates of 0, 20, 40, 60, 80 and 100 kg P ha−1 yr−1 and NH4NO3 addition (0 and 100 kg N ha−1 yr−1) on soil labile (Olsen-P), moderate-cycling and recalcitrant inorganic phosphorus (IP) fractions in a calcareous grassland of northeastern China. Soil moderat...
Conference Paper
Full-text available
Fungi and bacteria play a central role in the cycling of carbon (C) and nitrogen (N), which has been frequently assessed by manipulating their abundance in soil with application of fungicides and bactericides. We conducted a meta-analysis using 61 publications related to fungicide and bactericide effects on soil and microbial properties. We observe...
Article
Full-text available
Soil microbial processes are crucial for understanding the ecological functions of arid and semi-arid lands which occupy approximately 40% of the global terrestrial ecosystems. However, how soil microbial metabolic activities may change across a wide aridity gradient in drylands remains unclear. Here, we investigated three soil microbial metabolic...