Nitrogen fixation (C2H2reduction) as influenced by sulphate in paddy soils

Autor:	J. L. N. Rao, V. Bajaramamohan Rao
Rok vydání:	1986
Předmět:	Chemistry Inorganic chemistry Nitrogenase chemistry.chemical_element Sulfur Alkali soil chemistry.chemical_compound Environmental chemistry Soil pH Soil water Genetics Nitrogen fixation Animal Science and Zoology Soil fertility Sulfate Agronomy and Crop Science
Zdroj:	The Journal of Agricultural Science. 106:331-336
ISSN:	1469-5146 0021-8596
DOI:	10.1017/s0021859600063929
Popis:	SUMMARYThe influence of addition of sulphate on acetylene reduction in three paddy soils differing in their properties under two water regimes was investigated in a laboratory experiment. Nitrogenase activity was high in a P-deficient alkaline soil and addition of sulphate further enhanced the activity under two water regimes, with a pronounced stimulation under non-flooded conditions. Sulphate application to submerged alluvial soil enhanced nitrogenase activity with no apparent effect under non-flooded conditions. In acid sulphate saline Pokkali soil sulphate addition had little effect on the nitrogenase activity. Sulphate addition did not result in significant changes in the soil pH and redox potential. No relationship seemed to exist between the sulphate disappearance and stimulation of nitrogenase in these soils. A differential stimulation of N2-fixing microorganisms was noticed as a result of sulphate application. Results suggest that sulphate-induced stimulation of nitrogenase activity occurs in non-flooded soils.
Databáze:	OpenAIRE
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