Influence of Organic Matter Vis-à-Vis Humic Acid on the Transformation of Inorganic and Organic Forms of Nitrogen in a Typic Haplustept Soil. Issue 9 (15th May 2017)

• Record Type: Journal Article
• Authors: Devi, N. Surbala; Saha, D.
• Is Part Of: Communications in soil science and plant analysis. Volume 48:Issue 9(2017)
• Page Start: 1042
• Page End: 1051
• Publication Date: 2017-05-15
• Subjects: Humic acid -- inorganic N -- mustard cake -- N-transformation -- organic N; Soil science -- Periodicals; Plants -- Chemical analysis -- Periodicals; Agricultural chemistry -- Periodicals; 631.405
• DOI: 10.1080/00103624.2017.1323093
• Languages: English
• ISSNs: 0010-3624

Abstract

ABSTRACT: A laboratory experiment was conducted to study the changes in inorganic and organic forms of nitrogen (N) in a Typic Haplustept soil treated with mustard cake vis-à-vis humic acid in the presence and absence of inorganic N. Results revealed that irrespective of treatments, significantly higher amount of soluble nitrate (NO3 - ), hydrolysable ammonium (NH4 + ), non-hydrolysable and total N were accumulated in the soil treated with mustard cake in the presence of inorganic N. However, on the other hand, a humic acid-treated system showed significantly higher content of exchangeable NH4 + and hexosamine N. Application of humic acid alone leads to the accumulation of a significantly higher amount of total hydrolysable and unidentified N in the soil. Among the different treatments, NH4 + fixation was more in mustard cake followed by humic acid-treated soil. Humic acid is more susceptible to mineralization than mustard cake, particularly with respect to total N accumulation in soils.