Organic Fertilization of Growing Media: Response of N Mineralization to Temperature and Moisture - Institut Agro Rennes-Angers Accéder directement au contenu
Article Dans Une Revue Horticulturae Année : 2022

Organic Fertilization of Growing Media: Response of N Mineralization to Temperature and Moisture

Résumé

Managing plant fertilization is a major concern of greenhouse growers when it comes to sustainable production on growing media. Organic fertilization is popular, but more difficult to control since organic compounds first need to be mineralized by microbes. The objective of this study was to characterize the time course of N mineralization by different fertilizer–growing media pairs, in the absence of plants. Several incubations were carried out at four temperatures (4, 20, 28, and 40 °C) and three suction potentials (−3.2, −10, and −31.6 kPa) on four growing media under two organic fertilization conditions to study the dynamics of NH4+ and NO3− production. The results showed that the release of mineral N was strongly dependent on growing media, temperature, humidity, and fertilizer nature, varying from 10.7% to 71.3% of the N fertilizer applied. A temperature action law was established for the four growing media. The Q10 value of the growing media was 1.13, lower than the average Q10 value of arable soils. On the other hand, the specific behavior of the growing media did not yield a single humidity action law. Nevertheless, the nitrification process, evaluated by analyzing the ratio of NO3− to total mineral N, showed a humidity-dependent relationship common to the four growing media and comparable to admitted observations on soils. Nitrification was optimal when growing media humidity was higher than 0.46 v/v

Domaines

Agronomie
Fichier principal
Vignette du fichier
Cannavo-et-al.-2022-horticulturae-08-00152-v2-3.pdf (1.95 Mo) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-03575951 , version 1 (15-02-2022)

Licence

Paternité

Identifiants

Citer

Patrice Cannavo, Sylvie Recous, Matthieu Valé, Sophie Bresch, Louise Paillat, et al.. Organic Fertilization of Growing Media: Response of N Mineralization to Temperature and Moisture. Horticulturae, 2022, 8 (152), pp.1-18. ⟨10.3390/horticulturae8020152⟩. ⟨hal-03575951⟩
76 Consultations
280 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More