National Academy of Agricultural Sciences (NAAS)
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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 |
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.
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