A5053150461- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Plant nutrient uptake and metabolism
- Peatlands and Wetlands Ecology
- Crop Yield and Soil Fertility
- Soil and Unsaturated Flow
- Phosphorus and nutrient management
- Soil erosion and sediment transport
- Radioactive contamination and transfer
- Soil Geostatistics and Mapping
- Fungal Biology and Applications
- Plant Pathogens and Fungal Diseases
- Agronomic Practices and Intercropping Systems
- Nitrogen and Sulfur Effects on Brassica
- Mycorrhizal Fungi and Plant Interactions
- Agricultural Productivity and Crop Improvement
- Soil Management and Crop Yield
- Plant Micronutrient Interactions and Effects
- Legume Nitrogen Fixing Symbiosis
- Plant Surface Properties and Treatments
- Species Distribution and Climate Change
- Odor and Emission Control Technologies
- Medical Imaging and Pathology Studies
- Insect behavior and control techniques
- Plant and Biological Electrophysiology Studies
University of Bonn
2016-2024
Kiel University
2022
University of Göttingen
2021
Abstract Background Even with extensive root growth, plants may fail to access subsoil water and nutrients when root-restricting soil layers are present. Biopores, created from decaying roots or fauna, reduce penetration resistance channel growth into the deeper soil. Further positive effects on result biopore traits, as pore walls enriched in nutrients, microbial abundance, activity relative bulk However, negative plant have also been observed due clumping biopores, less root-soil contact...
Agricultural management can influence soil organic carbon (SOC) stocks and thus may contribute to sequestration climate change mitigation. The depth which agricultural practices affect SOC is uncertain. Soil have an important bearing on dynamics, so it consider effects capture fully changes in stocks. This applies particular the evaluation of farming measures, are becoming increasingly due change. We sampled analysed upper metre mineral cropland soils from ten long-term experiments (LTEs)...
Abstract Subsoil organic carbon (OC) is generally lower in content and more heterogeneous than topsoil OC, rendering it difficult to detect significant differences subsoil OC storage. We tested the application of laboratory hyperspectral imaging with a variety machine learning approaches predict distribution undisturbed soil cores. Using bias-corrected random forest we were able reproduce cores very good excellent model goodness-of-fit, enabling us map spatial at high resolution (~53 × 53...
Summary Arable subsoils store large amounts of phosphorus (P); however, it is unclear to what extent, and under which conditions, subsoil resources might supplement crop P acquisition. Here, we hypothesized that (i) insufficient supply in topsoil promotes acquisition from (ii) cycling regulated by nitrogen (N) supply. We sampled two German long‐term fertilizer trials Thyrow (sandy soil) Gießen (loamy‐clayey 100‐cm depth. Treatments received either NPK, NK or PK for > 60 years. assessed...
Sustainable forest management requires understanding of ecosystem phosphorus (P) cycling. Lang et al. (2017) [Biogeochemistry, https://doi.org/10.1007/s10533-017-0375-0] introduced the concept P-acquiring vs. P-recycling nutrition strategies for European beech (Fagus sylvatica L.) forests on silicate parent material, and demonstrated a change from to P-rich P-poor sites. The present study extends this rock-based assessment sites with soils formed carbonate bedrock. For all sites, it presents...
Microaggregates (<250 µm) are key structural subunits of soils. However, their formation processes, rates, and transformation with time poorly understood. We took advantage multiple isotope labelling potential organic gluing agents inorganic building units to unravel role in soil aggregation processes being initiated without plant growth. added 13C-labelled extracellular polymeric substances (EPS), 15N-labelled bacteria, 57Fe-labelled goethite, 29Si-labelled montmorillonite fine <250 µm an...
Crop production often leads to soil organic carbon (SOC) losses. However, under good management practice it is possible maintain and even re-accumulate SOC. We evaluated how different cropland techniques affected SOC stocks in the topsoil (0–30 cm depth) of 10 long-term experiments (LTE) Germany. found that were particularly enhanced by mineral fertilization amendments like straw incorporation a smaller degree irrigation, but only slightly choice preceding crops. In agreement with global...
The application of lime and mineral fertiliser is known to mitigate soil acidification improve quality in improved grasslands. However, the long-term effect simultaneous amendments on carbon (C) sulphur (S) cycling still poorly understood. To examine if pH or nutrient availability are dominant factors regulating C S cycling, we evaluated biodegradation methionine (organic S), gross transformation, microbial utilisation using 35S 14C dual-labelling. Soil samples (0-10 cm) were collected from...
Nitrogen (N) and phosphorus (P) deficiencies can significantly reduce crop yield. Despite their importance, the impacts of N P under field conditions on cereal roots, particularly winter rye, remain poorly understood. This study investigates effects rye growth root architecture conditions. A sampling campaign was conducted during 2022 season at long-term fertilizer experiment Dikopshof, Germany. Four treatments were chosen: (1) fully fertilized with manure (NPKCa+m+s), (2) without (NPKCa),...
The soil hydraulic conductivity function describes the soil&#8217;s ability to transmit water and in land surface models (LSMs) this is often estimated from texture organic carbon (SOC) content. In addition, wet range (Ksat K@h=-2cm) strongly influenced by structure, whereby structural information currently not used estimate conductivity. Neglect of structure can therefore lead false estimations hydrological fluxes storage. order quantify impact on conductivity, we conducted infiltration...
Abstract Background and aims : Phosphorus (P) is an essential element for crop growth. However, while links of P turnover in soils to carbon (C) nitrogen (N) availability have been described, it remains be clarified how combinations fertilizer C N additions affect stocks cycling distinct fractions at different soil depths. The objectives our study were (1) assess total are affected by organic amendments fertilization, (2) evaluate respond (3) verify whether fertilization increases biological...
Abstract Soil water status, which refers to the wetness or dryness of soils, is crucial for productivity agroecosystems, as it determines nutrient cycling and uptake physically via transport, biologically moisture‐dependent activity soil flora, fauna, plants, chemically specific hydrolyses redox reactions. Here, we focus on dynamics nitrogen (N), phosphorus (P), sulfur (S) review how coupled these elements related stoichiometric controls across different scales within agroecosystems. These...
Abstract. Phosphorus (P) species in colloidal and dissolved soil fractions may have different distributions. To understand which P are potentially involved, we obtained water extracts from the surface soils of a gradient Cambisol, Stagnic Cambisol to Stagnosol temperate grassland Germany. These were filtered < 450 nm, divided into three procedurally defined fractions: small-sized colloids (20–450 nm), nano-sized (1–20 (< 1 using asymmetric flow field-flow fractionation (AF4), as well...
Abstract Deep‐ploughing far beyond the common depth of 30 cm was used more than 50 years ago in Northern Germany with aim to break root‐restricting layers and thereby improve access subsoil water nutrient resources. We hypothesized that effects this earlier intervention on soil properties yields prevailed after years. Hence, we sampled two sandy soils one silty (Cambisols a Luvisol) which half field had been deep‐ploughed (soils then re‐classified as Treposols). The adjacent other not thus...
Erosion of fertile topsoil means severe land degradation and yield loss. Here, we show that reformation the crop increase is possible by good agricultural management within a few decades. Evidence relies on unique long-term field experiment in NE Germany, where 1964 sandy soil (Luvisol) had been excavated to 52 cm refilled with subsoil material thickness. Undisturbed trials served as controls, these were all combined either no fertilisation, mineral fertilisation or organic fertilisation. It...
Roots can add significant amounts of carbon (C) to the subsoil, which improves soil physical properties and mitigate climate change. About 5% croplands in Germany have been deep-ploughed (30–120 cm) at least once. This provide better root access subsoil may increase yields, but little is known on fate root-derived C (at depth greater than 30 after deep-ploughing. We hypothesized that five decades deep-ploughing, stocks were higher conventionally ploughed treatments due development. analysed...