EFFECT OF NUTRIENT MANAGEMENT PRACTICES IN GRAPE ORCHARDS OF JAMAKHANDI ON SOIL PROPERTIES, PETIOLE NUTRIENT CONTENTS AND GRAPE YIELDS
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Date
2016-09
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UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT
Abstract
A study on nutrient management practices in grape orchards and its influence on soil
fertility, petiole nutrient contents and grape yields were carried out during 2015-16 in
Jamakhandi taluka. Based on the nutrient inputs, the grape orchards were grouped in to five
categories namely, Medium-N and Very low-K (category-1), Medium-N and Low-K
(category-2), Medium-N and Medium-K (category-3), High-N and Medium-K (category-4)
and Very high-N and High-K (category-5) fertilizer users using K-factorization technique.
The amount of fertilizer - N added in grape orchards varied distinctly in the order of
category-1 = category-2 < category-3 = category-4 = category-5 orchards while, the applied
K2O varied significantly in the order of category-5 > category-4 > category-3 > category-2 >
category-1 grape orchards. The nutrient additions through organic manures did not vary
significantly. However, total nutrient additions differed significantly in the order similar to
that of applied N and K2O.
The pH and EC of grape soils did not differ significantly among five different
categories. The pH ranged from 7.43 to 8.42 while, the EC ranged from 0.26 to 1.77 dS m-1.
The available-N was observed in low and medium ranges. Most of the soil samples recorded
higher available- P2O5 and K2O contents and none of them were found in lower range. The
available-N was found significantly higher in category-4 as compared to category-1grape
orchard and availability-P2O5 and K2O status was found higher in category-4 and category-5.
The available-Ca was found higher in category-5 and available-Mg contents was found
significantly higher in Category-3.While, the available-S and DTPA extractable
micronutrients remained non-significant.
The petiole-N content was found significantly high (1.38 %) in category-4 orchards
compared to category-1 (1.15 %) orchards. The petiole- P was found in order of category-5 >
category-4 > category-3 > category-1> category-2 grape orchards. Similarly petiole-K was
found in the order of category-5 > category-4 > category-3 > category-2 > category-1 grape
orchards. All the secondary and micro nutrients in grape petioles remained on par among
different grape orchard categories.
The grape yields obtained in different orchards ranged from 20.0 to 28.75 t ha-1 and
recorded significant differences in the order: category-4 (27.42 t ha-1) > category-3 (25.90 t
ha-1) > category-5 (25.15 t ha-1) > category-2 (23.50 t ha-1) > category-1 (22.58 t ha-1) grape
orchards.
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