Lecture 18 Flashcards
1
Q
What does BNF stand for
A
Biological N Fixation
2
Q
What makes up 1% of BNF
A
Free living bacteria
3
Q
What makes up 99% BNF
A
Symbiotic relationship with plant & bacteria
4
Q
What enzyme catalyzes N fixation
A
Nitrogenase
5
Q
What is required to split N2
A
Symbiosis
Provides energy to break triple bond
6
Q
What do heterotrophs use SOM for
A
Building biomass
7
Q
What do Ammonifiers use SOM for
A
Electron acceptor
8
Q
What do autotrophs use to build biomass
A
CO2
9
Q
What do Nitrifiers use as an electron acceptor
A
NH4+
10
Q
What happens during Ammonification
A
-mineralization/immobilization
-micro organisms decomposing SOM for energy and building block for biomass
-low C/N; net accumulation of ammonium
11
Q
What does surplus of ammonium lead to
A
Nitrification
