BORON NUTRITION IN SUNFLOWER
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Date
2015-07-10
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
A field experiment was conducted to study the response of sunflower hybrid,
KBSH-53to boron on a soil with low boron (0.3 ppm) during kharif-2014 at All India Coordinated
Research Project on Sunflower, Gandhi Krishi Vignana Kendra, Bengaluru.
The experiment laid out in a Randomised Complete Block Design with 11 treatments
replicated thrice. Treatments consisting of application of recommended dose of fertilizer
(RDF-90:90:60 kg NPK ha-1 and 7.5 t FYM) alone, RDF along with application of borax
through seed treatment, soil application, spraying and dusting to capitulum at ray floret
opening stage. The results revealed that application of RDF + borax @ 0.4 % spray to
capitulum at ray floret opening stage recorded significantly higher seed and oil yield
(2176 kg ha-1 and 858.5 kg ha-1, respectively). It was attributed to higher SPAD
(chlorophyll content)reading of 44.38 at 50 % flowering, higher leaf area (4269 cm2 plant-
1)at 60 DAS and higher yield attributing characters like capitulum diameter (15.97 cm),
test weight (5.22 g 100 seeds-1), total seeds (1233 numberscapitulum-1), filled seeds (1195
number capitulum-1), seed yield (48.87 g plant-1), lower chaffiness (3.07 %) and higher N
(112.09), P (25.62 kg ha-1) and K (93.86 kg ha-1) uptake. Higher net returns (` 44527
ha-1) and benefit cost ratio (3.37) was obtained in this treatment.
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