Nitrogen cycling in organically fertilized growing media

Mineral nitrogen (N) has been the primary focus of attention in the study of N dynamics in soil and plant nutrition.
However, soluble organic N compounds also exist in soil and often can be in greater concentration than the mineral N pool.
In growing media, and particularly in organically managed growing media, the uptake of organic N can become an important part of plant nutrition.
However, increasingly diverse growing media and organic fertilizers sources challenge our understanding of the N mineralization mechanism including the mineralization rate, and production and cycling of small soluble organic N compounds.
More work is needed that includes both the N mineralization process and N pools investigation to be able to improve plant N nutrition under organically fertilized growing media.
In growing media, new opportunities to explore the concept of N mineralization engineering are developing which include the building of local and sustainable substrates and the use of biostimulants.

I International Symposium on Growing Media, Compost Utilization and Substrate Analysis for Soilless Cultivation

J. Dessureault-Rompré

horticulture, nitrogen mineralization, nitrogen pools, organic fertilizers, peat, peat-free substrate

https://doi.org/10.17660/ActaHortic.2024.1389.44