Revisiting Biological Nitrogen Fixation Dynamics in Soybeans.

ABSTRACT: Biological nitrogen (N) fixation is the most relevant process in soybeans (Glycine max L.) to satisfy plant N demand and sustain seed protein formation. Past studies describing N fixation for field-grown soybeans mainly focused on a single point time measurement (mainly toward the end of the season) and on the partial N budget (fixed-N minus seed N removal), overlooking the seasonal pattern of this process. Therefore, this study synthesized field datasets involving multiple temporal measurements during the crop growing season to characterize N fixation dynamics using both fixed-N (kg ha^-1) and N derived from the atmosphere [Ndfa (%)] to define: (i) time to the maximum rate of N fixation (β₂), (ii) time to the maximum Ndfa (α₂), and (iii) the cumulati

SUBMITTER: Ciampitti IA 

PROVIDER: S-EPMC8529188 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature