Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2025
Forfattere
Arne Verstraeten Andreas Schmitz Bernd Ahrends Nicholas Clarke Wim de Vries Karin Hansen Char Hilgers Carmen Iacoban Tamara Jakovljevic Per Erik Karlsson Till Kirchner Aldo Marchetto Henning Meesenburg Gunilla Pihl Karlsson Anne-Katrin Prescher Anne Thimonier Peter WaldnerSammendrag
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Forfattere
Aline Roma Tomaz William Ramos da Silva Thiago Inagaki Emylaine Oliveira Santos Giselle Gomes Monteiro Fracetto Felipe José Cury Fracetto Vitor da Silveira Freitas Diego Victor Babos Debora Marcondes Bastos Pereira Milori Abelardo Antônio de Assunção Montenegro Ademir de Oliveira FerreiraSammendrag
Knowledge gaps persist regarding mulch decomposition, nutrient dynamics, and microbial responses in semi-arid soils under reclaimed water irrigation. This is a critical issue for water-scarce regions like the Brazilian semi-arid. This study evaluated these processes in cactus-sorghum intercropping systems with mulch under irrigation depths with reclaimed water. The study employed a randomized block design with four replicates, testing irrigation depths of 0 %, 80 %, 100 %, and 120 % of sorghum ETc. Mulch decomposition was monitored for 165 days using litter bags, with subsequent C/N analysis of residual biomass. Soils at 0–0.10 m and 0.10–0.20 m depths were sampled to determine the contents of NO₃−, NH₄+, P, and microbial biomass C (MB-C), basal soil respiration, and aromatization index (ALIFS). Decomposition revealed the highest rates at 10 days (16 %) under 80 % ETc and at 25 days (24 %, 22 %, and 21 %) under 80 %, 100 %, and 120 % ETc, surpassing non-irrigated soils. Residue half-life was 182–196 days. Mulch N content declined most sharply at 10 days (1.2–1.8 g kg−1 in irrigated treatments). Soil NH₄+ and NO₃− peaked in the 0–0.10 m layer, but nitrate decreased by 15–62 % at 65 days, signaling microbial disruption from water excess. MB-C dropped >90 % at 65 days but recovered by 165 days, with the 80 % and 100 % treatments showing the highest MB-C in surface soils. These treatments also increased available P₂O₅ by 46–216 mg kg−1 versus 0 % and 120 % ETc. The ALIFS was higher in irrigated soils, especially at 120 % ETc (0–0.10 m). Reclaimed water irrigation enhanced nutrient supply, decomposition, and microbial activity, reducing synthetic fertilizer dependency while improving soil health in semi-arid agroecosystems.
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Forfattere
Christophe Moni Eva Farkas Claire Coutris Hanna Marika Silvennoinen Anders Aas Marit Almvik Liang Wang Kathinka Lang Liu Xingang Marianne StenrødSammendrag
Biochar and pesticides are likely to be increasingly used in combination in agricultural soils, yet their combined effects on climate change mitigation remain unexplored. This study presents an 8-month incubation experiment with different soil types (silt loam and sandy loam), biochars (corncob and corn stem), and pesticides (with and without a pesticide mixture), during which CO2 production from soil organic matter (SOM) and biochar mineralisation was monitored using isotopic methods. A comprehensive modelling approach, describing all mineralisation results over the entire incubation with a reduced set of parameters, was employed to isolate the effects of biochar, pesticides, and their interactions across soil types and carbon pools, and captured the dynamic effect of biochar on SOM mineralisation. Over 99.5% of biochars remained inert after 8 months, confirming the role of biochar as a carbon sequestration technology. Biochar addition showed higher SOM stabilisation potential in soil with high clay content compared to soil with low clay content. This suggests that biochar amendment should be considered carefully in clay-depleted soils, as it could result in a loss of native SOM. Corn stem biochar, characterised by high surface area and low C/N ratio, demonstrated higher SOM stabilisation potential than corncob biochar with low surface area and high C/N ratio. Pesticide application reduced SOM mineralisation by 10% regardless of soil and biochar types. Finally, the interaction between corncob biochar and pesticides further reduced SOM mineralisation by 5%, while no interactive effect was observed with corn stem biochar. These findings highlight the importance of considering biochar-pesticide interactions when evaluating the impact of biochar amendments on native SOM stability.
Forfattere
Claire CoutrisSammendrag
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Forfattere
Marianne BechmannSammendrag
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Forfattere
Marianne BechmannSammendrag
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