Response of broccoli (Brassica oleracea var. italica L.) to boron, zinc and lime application in acidic soil
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Date
2018-09-12
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Abstract
The present investigation entitled, “Response of broccoli (Brassica oleracea var.
italica L.) to boron, zinc and lime application in acidic soil” was conducted at Department
of Vegetable Science, College of Agriculture under Orissa University of Agriculture and
Technology, Bhubaneswar, Odisha, India during Rabi season of 2017-18. The objective was
to study the impact of boron, zinc and lime application on growth, yield and quality of
broccoli variety Palam Samridhi. The field experiment was conducted by adopted split plot design
with main plot as lime (with and without lime) and sub-plot as micronutrients (viz; seven levels:
soil application of B @1kg ha -1 , Zn@5kg ha -1 and their combinations as well as foliar spray of
0.2% borax, 0.5% ZnSO 4 and their combinations along with control) , replicated thrice.
The results revealed significant variations among the treatments for all the parameters
under study. Invariably, combined foliar spray of 0.2% borax with 0.5% ZnSO 4 significantly
increased the vegetative growth (viz; plant height- 46.27 cm, leaves plant -1 - 24.62, stem girth-
16.85 cm, plant spread- 62.20 cm
and leaf area- 557.50 cm 2 ); head yield attributing
parameters (viz; weight and diameter of central head-313.67 g,17.37 cm; secondary head -
88.83g, 5.33cm, total head weight - 402.50g with minimum production of defective heads-
4.44%); total head yield (136.80 qha -1 ); head quality (viz; TSS-7.03 0 Brix, ascorbic acid- 97.25
mg100g -1 , protein-1.70% and total sugar-1.79% ) with higher BC ratio (1.85). The next best
treatment identified was foliar spray of 0.5% ZnSO 4 , irrespective of lime application.
Similarly, application of lime significantly increased the vegetative growth (viz; plant
height-42.09 cm, leaves plant -1 -23.46, stem girth-16.30 cm, plant spread-58.65 cm and leaf
area-486.62 cm 2 ); head yield attributing parameters (viz; weight and diameter of central head-
305.52g,17.18cm; secondary head-84.36g, 5.34cm and total head weight-389.88g with
minimum production of defective heads-8.67 %); total head yield (134.73 qha -1 ); head quality
(viz; TSS-7.06 0 Brix, ascorbic acid-94.70 mg100g -1 , protein-1.48% and total sugar-1.73%)
with higher BC ratio (1.80), irrespective of micronutrient applications.
Thus, it may be concluded that combined application of 0.2% borax with 0.5% ZnSO 4
not only increases the vegetative growth, head yield and head quality attributes but also
increases the uptake of nutrients with higher Benefit Cost ratio in broccoli variety Palam
Samridhi. Foliar application of micronutrient performed better as compared to their
corresponding soil application. Similarly, lime application is essential in acidic soil not only
to increase the vegetative growth, head yield, head quality attributes in broccoli but also
increase the nutrient uptake with maintenance of the post harvest soil fertility status.
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