Nitrification Rates Are Affected by Biogenic Nitrate and Volatile Organic Compounds in Agricultural Soils.

ABSTRACT: The processes regulating nitrification in soils are not entirely understood. Here we provide evidence that nitrification rates in soil may be affected by complexed nitrate molecules and microbial volatile organic compounds (mVOCs) produced during nitrification. Experiments were carried out to elucidate the overall nature of mVOCs and biogenic nitrates produced by nitrifiers, and their effects on nitrification and redox metabolism. Soils were incubated at three levels of biogenic nitrate. Soils containing biogenic nitrate were compared with soils containing inorganic fertilizer nitrate (KNO₃) in terms of redox metabolism potential. Repeated NH₄-N addition increased nitrification rates (mM NO₃ ^1- produced g^-1 soil d^-1) from 0.

SUBMITTER: Mohanty SR 

PROVIDER: S-EPMC6527594 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature