Soil application and frequencies of foliar spray of boron on growth and yield of cauliflower (Brassica oleracea var. Botrytis) cv. Shobha F1
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Date
2019
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Orissa University of Agriculture and Technology, Bhubaneswar
Abstract
A field experiment entitled “Soil application and frequencies of foliar spray of boron on growth and yield of cauliflower (Brassica oleracea var. Botrytis) cv. Shobha F1” was conducted in collaboration with AICRP on micronutrient, Department of Soil Science and Agricultural Chemistry and Department of Plant Physiology, College of Agriculture, OUAT, Bhubaneswar during Rabi, 2018. The experiment was laid out in a randomized block design (RBD) and were replicated thrice. Cauliflower ‘Shobha F1’ was transplanted in the main field and treated with boron (as borax) as soil application (1kg B ha-1) and foliar applications with 0.25%, 0.5%,0.75% and 1% borax applied as once and twice conjugated with recommended dose of fertilizers. The variation among the treatments of boron on cauliflower in the morpho-physiological parameters were recorded after 45 days of transplanting till harvest and biochemical parameters at two growth stages (curd initiation and harvest). The effect of boron in different forms and concentrations on the growth, yield, yield attributes and changes in their metabolites were analyzed statistically and the findings are discussed and shortlisted with a concluding remark. Foliar spray of Borax@0.5% applied twice at two critical growth stages showed significant effect on morpho-physiological and biochemical traits with increase in plant height, no. of leaves, leaf area, total biomass, changes in biochemical and yield attributes than the soil and foliar application of borax applied once. The biochemical changes like chlorophyll, carotenoid, carbohydrate, protein and quality parameters like ascorbic acid, riboflavin, niacin, flavonoid increased in its accumulation in foliar spray @0.5% borax twice than rest of the treatments. The plant nutrient content N, P and K was influenced considerably by different boron levels in treated plots. The stress molecule proline increased in FS@0.75% to 1% once/twice. The yield and yield components like curd diameter, curd depth, curd weight, yield (q ha-1), HI and B:C ratio remarkably increased in foliar spray @0.5% borax twice than other treatments. The findings of present study suggest that foliar spray@0.5% borax twice showed highest effect to all parameters of cauliflower growth and yield than soil application of boron.
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Th-5673
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