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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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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.2017.6(11): 13-23
DOI: https://doi.org/10.20546/ijcmas.2017.611.002


Influence of Green Manure and Potassium Nutrition on Soil Potassium Fractions and Yield of Rice Crop
D.V. Sujatha*, P. Kavitha and M.V.S. Naidu
Department of Soil Science and Agricultural Chemistry, Agricultural College, Acharya N.G Ranga Agricultural University, Mahanandi- 518502, A.P., India
*Corresponding author
Abstract:

A field experiment was conducted with rice during kharif 2015 at Agricultural college farm, Mahanandi to study the influence of different levels of potassium either alone or in combination with green manure on yield and soil K fractions (water soluble, exchangeable, fixed and non-exchangeable forms) at different stages of rice crop. All the forms of K increased with increasing levels of potassium up to 120 kg K2O ha-1 at all the stages of crop growth.Green manure either alone or in combination with K fertilizer recorded higher values of exchangeable K and yield as compared with fertilizer treatments alone. The results clearly indicated that increase in fixed K with increasing fertilizer doses from 0 to 120 kg K2O ha-1 at all the stages of crop growth. The highest fixed K and non-exchangeable K was observed at 120 kg K2O ha-1 (T4). Whereas the highest yield, water soluble and exchangeable form were obtained with the treatment (T8) GM+120 kg K2O ha-1 which was on par with (T7) GM+80 kg K2O ha-1 and (T6) GM+40 kg K2O ha-1. Hence, the incorporation of green manure (dhaincha) at flowering stage before transplantation along with 40 kg K2O ha-1 may be recommended for rice crop. However, the results will have to be confirmed by conducting extensive field trails in farmer’s fields on long term basis.


Keywords: Water soluble K, Exchangeable K, Fixed K, Non-exchangeable K and dhaincha.
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How to cite this article:

Sujatha, D.V., P. Kavitha and Naidu, M.V.S. 2017. Influence of Green Manure and Potassium Nutrition on Soil Potassium Fractions and Yield of Rice Crop.Int.J.Curr.Microbiol.App.Sci. 6(11): 13-23. doi: https://doi.org/10.20546/ijcmas.2017.611.002