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
Joachim Paul Töpper Joseph Chipperfield Robert Lewis Liv Guri Velle Dagmar Dorothea Egelkraut Vigdis VandvikSammendrag
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Based on data from 58 stands located in three different regions within Norway, this study presents new models for quantifying growth characteristics of young, planted trees of Norway spruce (Picea abies (L.) Karst), a species that forms the backbone of the Norwegian forestry sector. The study focused on well-established, sufficiently stocked plantations to capture their inherent growth patterns. The presented models predict total tree height and the number of years required to reach a diameter at breast height of 5 cm for dominant and average-sized individuals, using common tree- and stand-level metrics. The study’s findings indicate enhanced growth of young spruce stands compared to growth dynamics observed in the 1960–1970s, likely due to improved growing conditions. The models presented here are an improvement over existing similar models and can be used in future forest growth and yield simulations. The study also aimed to provide a means to predict diameter distributions of young spruce plantations. While the results suggested significant differences between observed and predicted distributions, this still represents progress as there are currently no tools to estimate diameter distributions of young spruce plantations in Norway. Further research is recommended to corroborate the findings across a larger number of sites and to consider larger sample plots for potentially more accurate diameter distribution predictions.
Forfattere
Ruochen Li Xin Pei Ming Zhang Xuhui Deng Chengyuan Tao Jiabao Wang Xueli Chen Nicholas Clarke Lidia Sas-Paszt Zongzhuang Shen Rong Li Qirong ShenSammendrag
The application of livestock manure is a common waste utilization measure that can increase soil fertility and crop yields, but the antibiotics and resistance genes involved result in a potential threat to human health and animal welfare. Here, lettuce, a widely popular edible vegetable, was selected as a model with which to investigate the effects of long-term application (FM) and temporary cessation (cessation) of fresh chicken manure on the distribution and movement of antibiotic resistance genes (ARGs) in the soil-root-plant system to elucidate the bottleneck in assessing the health risks of manure application. ARGs associated with 13 antibiotics and 384 subtypes in soil were quantitatively analyzed via high-throughput qPCR, and the results revealed that cessation treatment significantly affected the patterns of bacteria, mobile genetic elements (MGEs) and ARGs in the soil, leaves and roots in the soil–lettuce cropping system compared with FM treatment. Cessation of manure application reduced the abundance of ARGs by 34.0 %, 53.7 %, and 23.9 % in the bulk soil, rhizosphere soil, and leaves, respectively. Correlation network and source-tracking analyses of ARGs and bacteria within leaves and roots revealed that cessation treatment reduced the diffusion of ARGs and bacteria within leaves and roots into adjacent sites, and partial least squares path model (PLSPM) analysis indicated that FM treatment indirectly affected the pattern of ARGs in soil by influencing the bacterial community and soil properties, which play key roles in the distribution of ARGs. In summary, we investigated the driving mechanism of the effects of manure on the microbial community and ARG spectrum in a soil–lettuce planting system, and the results can support strategies for managing the spread of ARGs in the soil.
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https://www.buskap.no/article/2025/04/Er%20det%20de%20beste%20r%C3%B8dkl%C3%B8versortene%20som%20benyttes%20i%20dag
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