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 major limiting factor in harnessing the potential nut weight in coconut (Cocos nucifera L.) in terai region of West Bengal is low leaf potassium and boron contents. For ascertaining the same in quantitative terms, an experiment was undertaken to evaluate the effects of potassium applied as muriate of potash @ 900, 1200 and 1500 g and boron as borax @ 25, 50, and 100 g/palm/year on leaf boron and potassium contents and nut weight in coconut during 2014-15 and 2015-16. The index leaf (14th frond) was used for determining the nutrients at 6 and 12 months after application. Application of the nutrients resulted in a significant increase in the respective nutrient content of the leaves. The combined application of the nutrients at the intermediate level (1200 g MoP with 50 g borax) recorded the maximum nut weight (1948.50 g) at 7 month age of nuts with 1.97% potassium and 24.52 mg/kg boron content of the leaves. The increase in nut weight was observed between from 6th to 7th months and thereafter, decreased progressively up to 12th months Further increase in the rate of application caused a decline in nut weight, despite an increase in the nutrient contents of the leaves. The combined application of the nutrients beyond the intermediate level also revealed the same trend, implying a negative interaction effect. Nut weight showed a positive correlation with increased leaf potassium and boron content only upto a certain level of application. Beyond this ‘greater than the optimum’ level, the nutrients resulted in a negative effect on nut weight.
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