EFFECT OF SOIL AND FOLIAR APPLICATION OF ZINC ON GROWTH AND YIELD OF KNOL KHOL (Brassica caulorapa var. gongylodes L.)
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Date
2018-07-25
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
A field experiment was conducted in the farmer’s field at Vijaypura, Bangalore
Rural District during kharif 2017, to study the effect of soil and foliar application of zinc
on growth and yield of knol khol (Brassica caulorapa var. gongylodes L.). The
experiment was laid out in a randomized complete block design with 10 treatments
replicated thrice. The experimental results indicated that significantly higher plant height
(39.90 cm), number of leaves per plant (14.83), leaf length (19.68 cm), chlorophyll
content (14.70 SPAD reading) and yield (23 t ha-1) was recorded in the treatment which
received RDF and FYM along with 4 kg of zinc through ZnSO4 as soil application and
0.14 per cent zinc through zinc sulphate as foliar spray. Application of 4 kg of zinc
through ZnSO4 as soil application + 0.14 per cent zinc through zinc sulphate as foliar
spray along with RDF and FYM significantly increased the total soluble solids (8.83
0Brix) and ascorbic acid content (56.73 mg 100g-1). Significantly higher zinc content in
knol khol leaf (36.48 mg kg-1), knob (38.67 mg kg-1) and total uptake of zinc (154.96 g
ha-1) was recorded in the treatment which received RDF and FYM along with 4 kg of
zinc through ZnSO4 as soil application and 0.14 per cent zinc through zinc sulphate as
foliar spray. Application of 8 kg of zinc through ZnSO4 as soil application along with
RDF and FYM recorded higher zinc content of 0.96 mg kg-1 in soil at harvest.
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