NITROGEN MINERALIZATION STUDY IN COMPOST

ISHS Acta Horticulturae 302: International Symposium on Compost Recycling of Wastes

NITROGEN MINERALIZATION STUDY IN COMPOST

Authors:

M. Navarro, M. Pujolà, M. Soliva, Ma. A. Garau

Abstract:
To know and to explain the processes followed by the different nitrogenate forms of a soil where compost of city garbage had been added, two methods were used:

Incubation of the mixture under controlate conditions, studying the microbial activity with a respirometry and periodically analysing the level of N-NH⁺₄, N-NO^-₃, water soluble organic N, total organic N and oxidable water soluble Carbon of the mixture.
Growing tests of ray grass in pots, taking soil and vegetal samples monthly doing the same analysis than in the incubation for the soil and controlling total dry production and nitrogen content for the ray grass.

The high doses of compost used and its low stability initially produce nitrogen immobilization.

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