Study of isotopic fractionation of nitrogen applied to grasses and forage legumes

Édina Cristine Pereira Lopes, Anibal de Moraes, Claudete Reisdorfer Lang


Studies about isotopic composition of nitrogen in soil and plant matter to identify differences in biogeochemical cycling processes of this element in ecosystems. To assess the contribution of BNF, as well as differences in ability to fix and transfer N among species of perennial leguminous crops and grasses there are several techniques that have been used as the acetylene reduction, isotopic dilution 15N and 15N natural abundance. However, the features responsible for these changes need to be largely identified. This review aimed to compare the dynamics of transfer and fixing N between grasses and forage legumes.



Key words: isotopic techniques, 15N natural abundance, BNF


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