EFFECT OF INDIGENOUS POTASSIUM SOURCES ON GROWTH, YIELD AND QUALITY OF CABBAGE (Brassica oleracea var. capitata)
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Date
2021-12
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Horticultural Sciences Bagalkot. (College of Horticulture, Bagalkot).
Abstract
A field experiment was carried out to study the effect of indigenous potassium sources
on growth, yield and quality of cabbage during the year 2020-21. The experiment laid out in
Randomized Complete Block Design (RCBD) comprised of 10 treatments with three
replications. Incinerated ash, distillery sludge and distillery sludge ash were used as indigenous
sources of potassium from sugar industry in different combinations along with Muriate of
Potash (MOP). Amongst the different combinations of treatments where 25 per cent of MOP
was supplemented with indigenous potassium sources that too incinerated ash recorded higher
growth parameters like leaf length (26.64 and 28.95 cm), leaf breadth (21.40 and 27.90 cm),
number of leaves (21.40 and 23.60), leaf area (331.80 and 498.70 cm2 ), plant height (23.22 and
28.83 cm) and SPAD meter reading (64.70 and 80.00) at 30 and 60 DAT, respectively and also
recorded higher quality and yield attributes like diameter of head (44.33 cm), dry matter of head
(7.20 g/100g), head compactness (11.96 kg cm-2
), vitamin C content (40.00 mg/100g) and
weight of head (1.07 kg/plant), yield per plot (51.36 kg/plot) and yield per hectare (79.26 t/ha),
respectively.
The treatment T7 (25% K through incinerated ash/ boiler ash + 75% MOP) showed
lower soil pH (7.14 and 6.94), EC (0.17 and 0.12 dsm-1
) and higher OC (0.81 and 0.74%) at 30
and 60 DAT, respectively. As far as available nutrients in soil also the treatment T7 recorded
higher nitrogen (335.53 and 275.96 kg ha-1)
, phosphorus (86.85 and 64.80 kg ha-1
), potassium
(582.50 and 569.20 kg ha-1
), calcium (25.30 and 23.01 c mol (p
+
) kg-1
soil), magnesium (5.47
and 4.36 c mol (p
+
) kg-1
soil) and sulphur (24.57 and 19.80 ppm) at 30 and 60 DAT,
respectively compared with control (RDF only).
Similarly, the total plant nutrient uptake such as nitrogen (205.98 kg ha-1
), phosphorus
(47.07 kg ha-1
), potassium (290.30 kg ha-1
), calcium (0.65 kg ha-1
), magnesium (0.32 kg ha-1
)
and sulphur (16.99 kg ha-1
) was found higher in treatment T7 compared with other treatments
where 25 per cent of MOP was supplemented with incinerated ash (boiler ash) and also the B:C
ratio was also found higher (1:4.94) in treatment T7 where 25 per cent of K was supplied
through incinerated ash. The outcome of the current research (25% incinerated ash + 75%
MOP) could be recommended for the farmers for higher returns.