Mineralisable nitrogen in relation to soil nitrogen forms and soil properties

Mohapatra, S.P.; Khan, S.K.

Oryza 20(4): 227-232

1983


Accession: 001410293

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Abstract
The contribution of organic nitrogen forms to mineralized nitrogen and the relation of the latter to soil properties in 21 lowland rice soils of India with a wide pH range were studied. Amino acids formed the major constituents of soil organic nitrogen. The mineralisable nitrogen released from soil organic nitrogen formed 0.45% to 4.6% of the total N contents. Amino acid-N and hydrolysable ammonium-N fractions were correlated with the mineralisable nitrogen under waterlogged conditions. Mineralisable nitrogen was also positively correlated with organic carbon and C/N ratio and negatively correlated with soil pH.