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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 (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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Original Research Articles

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(5): 2573-2582
DOI: https://doi.org/10.20546/ijcmas.2020.905.294


An Incubation Experiment to Study Potassium Fractions using Azolla, Vermicompost and Muriate of Potash as Potassium Sources in Inceptisol of Bihar
Mukta Rani1*, Arun Kumar Jha2, Bipin Bihari2, Amarjeet Kumar2 and Ajeet Kumar2
1Department of Soil Sc. & Agril. Chemistry, Institute of Agriculture Sciences,
Banaras Hindu University, Varanasi-221005, India
2Department of Soil Sc. & Agril. Chemistry, Bihar Agricultural University,
Sabour, Bhagalpur- 813210, India
*Corresponding author
Abstract:

To explore the suitability of various sources of potassium (K) application on K fractions (water-soluble K, Exchangeable K, 1 N HNO3 soluble K, Non-exchangeable K) through incubation study. An incubation experiment was conducted at department of soil science and agricultural chemistry, Bihar Agricultural University, Sabour, Bhagalpur in completely randomized block design with 8 treatments viz., T1 (no K application), T2 (50 per cent RDK), T3 (100 per cent RDK), T4 (150 per cent RDK), T5 (50 per cent RDK + 50 per cent K by Azolla), T6 (50 per cent RDK + 50 per cent K by vermicompost), T7 (100 per cent K by Azolla) and T8 (100 per cent K by vermicompost) replicated thrice and kept in incubator at 25 deg. Celsius and used to assess various forms of K in soil at 0, 35, 70 and 105 days of incubation. Full dose of N and P were applied in all the treatments through urea and SSP respectively. However, potassium was supplied through muriate of potash (MOP ; 60 per cent K2O), vermicompost (0.8 per cent K) and Azolla (2.62 per cent K on dry wt. basis). Experiment showed that available K content of incubated soil increases from 0 to 35 days of incubation (DAI) and decreases thereafter up to 105 DAI. Decrease in available K from 90 to 105 DAI was 13.87 % in T3. However, this decrease was only 3.97 % and 1.5 % in the treatment T5 and T6 respectively. Azolla and vermicompost maintains K availability by increasing exchangeable K and ensures constant availability of potassium.


Keywords: Azolla, Water-soluble K, Exchangeable K, Non-exchangeable K, DAI 
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How to cite this article:

Mukta Rani, Arun Kumar Jha, Bipin Bihari, Amarjeet Kumar and Ajeet Kumar. 2020. An Incubation Experiment to Study Potassium Fractions using Azolla, Vermicompost and Muriate of Potash as Potassium Sources in Inceptisol of Bihar.Int.J.Curr.Microbiol.App.Sci. 9(5): 2573-2582. doi: https://doi.org/10.20546/ijcmas.2020.905.294