Vol. 5, Issue 1 (2017)
Effect of boron fertilization on fate of soil boron pool under a rice-vegetable cropping system grown in an Inceptisols of Odisha
Author(s): Bandita Jena, Suravi Mohapatra, RK Nayak, J Das and AK Shukla
Abstract: To get quality food grains micronutrient Boron plays an important role apart from many other functions. Since a narrow gap exists between the deficiency and toxicity and only a very small fraction of applied Boron is utilized by crops the possible fate of applied Boron is needed to be quantified. Hence a study was undertaken to find out a suitable and sustainable boron dose for a Rice-Vegetable cropping system as well as effect of Boron application on various Boron pools. For this 4 doses of Boron (0.5,1.0,1.5 & 2.0 kg/ha) applied through three different frequencies(Once, Alternate year, Every year) with one no Boron control constituting 13 treatments replicated thrice in Randomized Block Design was conducted in a Boron deficient Inceptisols of central farm, Bhubaneswar, Odisha. Rice (cv Lalat) was raised with the Boron treatments as direct crop followed by Okra (cv Utkal Gourab) during rabi on residual Boron. Both the crops received recommended dose of fertilizer. Rice responded to Boron application by producing highest grain yield of 38 q/ha at 0.5 kg B/ ha applied every year and Okra grown on residual Boron responded to higher dose of Boron application @ 1.0 kg applied every year. Boron fractionation study conducted on post-harvest soil found that with increase in Boron dose and its frequency different Boron pools also increased to various degrees. Out of five different fractions residual Boron constituted highest of total Boron (70-80%). Ready soluble boron and specifically adsorbed Boron constituted a very small fraction of total (1-2%). All the fractions contributed significantly to Rice as well Okra yield and uptake to an extent of 94%, 45% and 73% respectively. Fraction study after two year suggested that in unfertilized control plot depletion of Readily soluble pools were observed where as in Boron fertilized plots though labile pools like Readily soluble Boron and Specifically bound Boron fractions increased but most of soluble fractions converted to less labile and non-labile pools thereby maintaining the B concentration at optimum level to meet crop requirement.
Pages: 74-78 | 1490 Views 55 Downloads
How to cite this article:
Bandita Jena, Suravi Mohapatra, RK Nayak, J Das, AK Shukla. Effect of boron fertilization on fate of soil boron pool under a rice-vegetable cropping system grown in an Inceptisols of Odisha. Int J Chem Stud 2017;5(1):74-78.