Open AccessResearch Concerning Nitrogen Fixation in Fodder Systems Based on Italian Ryegrass
Author(s) -
Cristian Ghiocel,
Neculai Dragomir,
Roxana Vidican,
Sebastian Toth,
Nicoleta Moraru
Publication year - 2012
Publication title -
bulletin of university of agricultural sciences and veterinary medicine cluj-napoca. agriculture
Language(s) - English
Resource type - Journals
eISSN - 1843-5386
pISSN - 1843-5246
DOI - 10.15835/buasvmcn-agr:8676
Subject(s) - fodder , nitrogen , nitrogen balance , nitrogen fixation , legume , agronomy , red clover , biomass (ecology) , biology , chemistry , organic chemistry
In any agricultural system based on legumes, nitrogen balance should take into account the flow of NÂ 2 by legume species. In this flow, the amount of N2 fixed by legumes is considered a reserve amount of nitrogen which, through harvesting, is removed from the nitrogen balance. The aim of the present paper is to assess the amount of nitrogen fixed biologically (NFB) in some legume species sowed in association and of the share of this amount of NFB of the total amount of nitrogen from the productions obtained. Thus, in the fodder system made up of Italian ryegrass + red clover cultivated for two years, the amount of NFB in the first year was 60 kg/ha. If we relate the amount of NFB to the amount of nitrogen exported through the fodder biomass, we see that the share of NFB varies between 22 and 42%.