TY - JOUR AU - Zacháry, Dóra AU - Filep, Tibor AU - Jakab, Gergely Imre AU - Ringer, Marianna AU - Balázs, Réka AU - Németh, Tibor AU - Szalai, Zoltán TI - Texture and clay mineralogy as main drivers of the priming effect in temperate forest soils JF - PLANT AND SOIL J2 - PLANT SOIL VL - 508 PY - 2025 IS - 1-2 SP - 547 EP - 565 PG - 19 SN - 0032-079X DO - 10.1007/s11104-024-06819-z UR - https://m2.mtmt.hu/api/publication/35086540 ID - 35086540 N1 - Online kiadás 2024 LA - English DB - MTMT ER - TY - JOUR AU - Filep, Tibor AU - Zacháry, Dóra AU - Balláné Kovács, Andrea AU - Király, Csilla AU - Béni, Áron AU - Jakab, Gergely Imre AU - Juhász, Evelin Kármen AU - Szalai, Zoltán TI - Insight into the dynamics of protected and non-protected carbon pools in four soils with different land uses JF - PLANT AND SOIL J2 - PLANT SOIL PY - 2025 PG - 18 SN - 0032-079X DO - 10.1007/s11104-024-07054-2 UR - https://m2.mtmt.hu/api/publication/35501757 ID - 35501757 N1 - Online kiadás 2024 AB - Background and aims To provide insight into the patterns of soil organic matter decomposition, changes in the quantity of biopolymers and the correlation between them were followed using 2D correlation spectroscopy (2DCOS) FTIR. Methods Soil organic matter fractions with diferent vegetation/land use (grass, spruce, oak and arable) were examined in a 1-year laboratory incubation. The non-protected organic matter fraction was calculated in terms of particulate organic matter (POM), the carbon stabilized in aggregates as S+A (sand+aggregates), and the mineral-associated organic matter (MAOM) as the s+c (silt and clay) fraction. Results Forest soils (spruce, oak) exhibited high C and N accumulation in the POM fraction (48, 43% and 29, 22% for spruce and oak, respectively) due to the limited decomposition, caused by low pH and high soil C/N ratio. The 2DCOS analysis revealed that carbohydrate-protein and carbohydrate-lignin correlations could be observed most frequently during incubation. The carbohydrate-protein correlation was negative in all cases, for all fractions and for all vegetation types, which suggests biogeochemical linkage between these biopolymers. The temporal order of the spectral changes was widely varied for the vegetation types and especially for the SOM fractions. Lipid/ Lignin → Carbohydrate or Lipid → Lignin/Carboxyl/ Protein sequences were found for the protected carbon pools (S+A and s+c), possibly because of the readily available abundant N compounds present in MAOM. Conclusion Although lipids and lignin are considered as chemically stable materials that commonly remain constant during decomposition, these compounds were found to be very susceptible in all the fractions. LA - English DB - MTMT ER - TY - JOUR AU - Gresina, Fruzsina AU - Szalai, Zoltán AU - Zacháry, Dóra AU - Kiss, Klaudia AU - Madarász, Balázs AU - Angyal, Zsuzsanna AU - Jakab, Gergely Imre AU - Darabos, Gabriella AU - Varga, György TI - Combined effect of a pretreatment and optical settings on the laser diffraction particle size distribution of soils and sediments JF - JOURNAL OF SOILS AND SEDIMENTS J2 - J SOIL SEDIMENT VL - 25 PY - 2025 SP - 160 EP - 178 PG - 19 SN - 1439-0108 DO - 10.1007/s11368-024-03933-4 UR - https://m2.mtmt.hu/api/publication/35600407 ID - 35600407 LA - English DB - MTMT ER - TY - CONF AU - Dévény, Zoltán AU - Vancsik, Anna AU - Sulyok, A AU - Frey, K AU - Karlik, Máté AU - Szalai, Zoltán AU - Jakab, Gergely Imre TI - Szervesanyag-ásvány komplexek kialakulása az altalajban T2 - 20. Téli Ásványtudományi Iskola - 20th Winter School in Mineral Sciences PY - 2025 UR - https://m2.mtmt.hu/api/publication/35793049 ID - 35793049 N1 - előadás AB - A talaj szervesanyaga (SOM) kulcsfontosságú annak termékenysége és egészsége szempontjából, valamint segíthet a szélsőséges csapadék- és aszályviszonyokkal szemben. A SOM főként ásványokhoz kötődve stabilizálódik az altalajban (<30 cm), amiről kevés ismeretünk van. Vizsgálataink szerint a SOM-adszorpció mértéke inkább az ásványfajok, mintsem azok felülete szerint változik (kvarc 200 µm, 50-200 µm, 20-50 µm, 2-20 µm, 0-2 µm and particulate organic matter (> 200 µm). The mass, organic and inorganic carbon content and nitrogen content of the fractions were determined. The chemical characterisation of the fractions was determined using FT-IR spectroscopy. For the detection of relative changes in the spectra and the chemical characterization of the different particle size fractions, an aromaticity index (A1610 cm-1/A2920 cm-1) and relative absorbances (2920, 1740, 1680, 1610, 1525, 1270, 1160 and 1050 cm-1) were calculated. Principal component analysis showed great differences between the six particle size fractions in terms of their chemical properties (characteristic organic compounds, aromaticity and C/N ratio). This research was funded by the SIC-SOC-DYN “Organic and inorganic carbon dynamic in calcareous soils” project of the 1st external Call within the EJP SOIL program, the National Research, Development and Innovation Fund, Hungary [Project N° 2019-2.14-ERA-NET-2022-00037 and FK 142936] and the French National Research Agency [Project N° ANR-22-SOIL-0003-01]. LA - English DB - MTMT ER - TY - CONF AU - Jakab, Gergely Imre AU - Dévény, Zoltán AU - Vancsik, Anna AU - Sulyok, Attila AU - Frey, Krisztina AU - Karlik, Máté AU - Király, Csilla AU - Szalai, Zoltán TI - The role of minerals in fractionated soil organic matter stabilization in the subsoil T2 - EGU General Assembly 2025 C1 - Bécs PY - 2025 DO - 10.5194/egusphere-egu25-9221 UR - https://m2.mtmt.hu/api/publication/36056648 ID - 36056648 LA - English DB - MTMT ER - TY - CONF AU - Szalai, Zoltán AU - Bauer, László AU - Dévény, Zoltán AU - Jakab, Gergely Imre AU - Filep, Tibor AU - Zacháry, Dóra AU - Vancsik, Anna AU - Maller, Csaba László AU - Vajna, Balázs AU - Szabó, Lili TI - Effects of organic micropollutants on the stability of soil organic matter : the hidden effect of the irrigation T2 - EGU General Assembly 2025 C1 - Bécs PY - 2025 DO - 10.5194/egusphere-egu25-8146 UR - https://m2.mtmt.hu/api/publication/36056689 ID - 36056689 LA - English DB - MTMT ER - TY - CONF AU - Dévény, Zoltán AU - Szalai, Zoltán AU - Karlik, Máté AU - Jakab, Gergely Imre TI - Land use change affects on subsoil organic matter in a steppe soil T2 - EGU General Assembly 2025 C1 - Bécs PY - 2025 DO - 10.5194/egusphere-egu25-17610 UR - https://m2.mtmt.hu/api/publication/36056713 ID - 36056713 LA - English DB - MTMT ER -