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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(8): 720-733
DOI: https://doi.org/10.20546/ijcmas.2020.908.078


Nitrogen Mineralization, Forms of Acidity and Fertility Status of a Paddy Soil as Influenced by Rice Stubble Management
Suravi Nandi1*, Binoy K. Medhi1, Rajen Barua1, Mrinal Saikia1, Hemanta Saikia2, Kashyap P. Bezbaruah3, Prantika Kakati1, Anupama Das1 and Nilay Borah4
1Department of Soil Science, 2College of Sericulture, 4College of Horticulture, Assam Agricultural University, Jorhat 785013 Assam, India
3Department of Agriculture, Nonoi, Nagaon 782001 Assam, India
*Corresponding author
Abstract:

An experiment was conducted in the laboratory of department of Soil Science, Assam Agricultural University, Assam (India) during November 2018 to April 2019 to evaluate inorganic nitrogen fractions, forms of acidity and fertility status in a rice soil as influenced by rice stubble (RS) management practices through a fifteen weeks incubation period under constant moisture regime. Untreated and glyphosate-yogurt treated rice stubble was either incorporated or left on the surface of soil-filled (15 cm depth on 5 cm sand at the bottom) poly vinyl chloride (PVC) pipe (25 cm long and 8.44 cm diameter),  mounted on tray maintaining a constant water depth of 5 cm and incubated for 105 days. Incorporation of rice stubble treated with glyphosate-yogurt mixture significantly increased NH4-N in soil compared to all other treatments, but the NO3-N in soil was affected neither by incorporation nor microbe culture spray. The variation in soil pH was not significant among the treatments except at 105 days after incubation. Incorporation of rice stubble, irrespective of glyphosate-yogurt treatment, significantly increased exchange acidity and total acidity in soil after 42 days of incubation. The total potential acidity in soil did not vary significantly throughout the study period. The exchangeable Ca2+, Mg2+ and K+ in soil increased significantly due to rice stubble incorporation with or without glyphosate-yogurt treatment, but the effect was not observed for cation exchange capacity of soil. Incorporation of rice stubble significantly increased available P and K contents in soil, irrespective of glyphosate-yogurt treatment.


Keywords: Rice stubble, Inorganic N-fractions, Exchangeable cations, Acidification
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How to cite this article:

Suravi Nandi, Binoy K. Medhi, Rajen Barua, Mrinal Saikia, Hemanta Saikia, Kashyap P. Bezbaruah, Prantika Kakati, Anupama Das and Nilay Borah. 2020. Nitrogen Mineralization, Forms of Acidity and Fertility Status of a Paddy Soil as Influenced by Rice Stubble Management.Int.J.Curr.Microbiol.App.Sci. 9(8): 720-733. doi: https://doi.org/10.20546/ijcmas.2020.908.078