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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(1): 853-865
DOI: https://doi.org/10.20546/ijcmas.2019.801.093


Kinetics of Nitrogen Mineralization as Influenced by Liming and Organic Amendments: A Laboratory Study
Lekhika Borgohain1*, Danish Tamuly1, Niloy Borah1, Samiran Dutta1, Dhruba Jyoti Nath1, Ramani kanta Thakuria2, Karishma Borahand Sarat Shekhar Bora4
1Department of Soil Science
3Department of Horticulture
4Department of Agronomy, Assam Agricultural University, Jorhat-13, Assam, India
2AICRP on Water Management, Department of Agronomy, AAU, Jorhat-13, Assam, India
*Corresponding author
Abstract:

A laboratory incubation experiment was carried out to study the N-mineralization and subsequent release of nitrogen from soil, treated with different levels of lime with organic amendments (FYM and enriched compost) over 100 days period. The experiment was laid out in a completely randomized design with 12 treatments replicated thrice. The data were fitted to first-order nitrogen mineralization model since it provided the best fit to the experimental data and also for its simplicity. Result revealed that release of Nitrate nitrogen (NO3--N) increased linearly with increasing lime dose and the incubation period whereas ammonical nitrogen (NH4+-N) increased exponentially with time and linearly with increasing lime dose. The values of mineralization rate constant (k) varied from 2.80×10-2 day-1 to 3.60×10-2 day-1 in different treatments. The potential mineralizable nitrogen (N0) varied from 200.98 mg kg-1 to 680.00 mg kg-1 across different treatments. The cumulative nitrogen content varied from 188.70 mg.kg-1 to 661.50 mg.kg-1 of soil. The highest rate of change of mineralizable nitrogen was found in treatment T6 (LR 100% + EC @ 5ton ha-1) whereas lowest was found in control. It was found that the rate of change of mineralizable nitrogen (dN/dt) decreased from the first day of incubation up to 100 days. The highest rate constant, cumulative nitrogen, potentially mineralizable nitrogen as well as mineral nitrogen were found to be significant and highest in treatment T6 consisting LR 100% + EC @ 5ton ha-1 than all other treatments.


Keywords: Enriched compost, FYM, Lime, N-mineralization, Kinetics
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How to cite this article:

Lekhika Borgohain, Danish Tamuly, Niloy Borah, Samiran Dutta, Dhruba Jyoti Nath, Ramani kanta Thakuria, Karishma Borah and Sarat Shekhar Bora. 2019. Kinetics of Nitrogen Mineralization as Influenced by Liming and Organic Amendments: A Laboratory Study.Int.J.Curr.Microbiol.App.Sci. 8(1): 853-865. doi: https://doi.org/10.20546/ijcmas.2019.801.093