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The role of higher molecular weight dissolved organic nitrogen in the plant-soil nitrogen cycle

Publikation: Bog/antologi/afhandling/rapportPh.d.-afhandlingForskning

Efficient use of N in agricultural systems is essential in the strive for sustainability in crop production and to counter the environmental and climate change challenges related to food production. A key issue in predicting plant available N is the turnover of complex higher molecular weight (Mw) organic N, like proteins and peptides, to lower Mw organic N, available for direct plant and microbial uptake.

In this PhD project a compound specific isotope analysis (CSIA) to characterize and quantify 15N and 13C-labeled amino acids from soil and plant samples were set up. Firstly, the CSIA was used to investigate the turnover and rate-limiting step of peptide-sized and protein-sized organic N, in soil with different management histories. Secondly, the CSIA was used to investigate the contribution of protein-sized organic N to the microbial and plant carbon and N nutrition.
Bidragets oversatte titelBidraget fra store vandopløselige kvælstofholdige organiske forbindelser til kvælstofcyklusen mellem jord og planter
OriginalsprogEngelsk
ForlagAarhus Universitet
Antal sider127
ISBN (Trykt)978-87-93787-58-2
StatusUdgivet - maj 2019

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