STUDIES ON SPACING AND FERTILIZER LEVELS ON GROWTH AND PRODUCTIVITY OF STEVIA (Stevia rebaudiana Bert.)
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Date
2008-12-17
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University of Agricultural Sciences GKVK, Bangalore
Abstract
A field experiment to study the spacing and fertilizer levels on
growth and productivity of stevia (Stevia rebaudiana Bert.) was carried
out at Division of Horticulture, UAS, GKVK, Bangalore during 2006 to
2007. The treatments consisted of three levels viz.30 x22.5 cm,45 x22.5
cm and 60 x 22.5cm as main and four levels of fertilizer (40:20:30 kg
NPK +FYM @10 t ha-1, 70:35:45 kg NPK + FYM @10 t ha-1, 100:45:60 kg
NPK + FYM @10 t ha-1 and @20 t ha-1) as sub treatments. The experiment
was laid out in Factorial Randomized Block Design with three
replications.
Among the different spacings, the spacing of 45 x 22.5cm recorded
significant plant height (52.85 cm) in 60DAP and number of branches
per plant (43.90), leaf area (19.99cm2), fresh leaf yield (13,005.12kg,
13,379.35kg and 13,944.60kg) per hectare, dry leaf yield (2,691.97kg,
2,882.14kg and 3,025.18kg) per hectare and stevioside content (11.64 %)
were recorded.
Among the major nutrients, significant plant height (60.40cm,
44.38cm and 45.07cm), number of branches (47.23, 49.96 and 49.26)
per plant, number of leaves (540.42, 487.27 and 496.20) per plant,
plants spread (313.38cm2, 405.70cm2 and 489.27cm2) and leaf area
(20.33cm2, 21.73 cm2 and 23.22cm2) were obtained under the
application of 70:35:45 kg NPK +FYM @10 t ha-1. In yield parameters the
same treatment also showed maximum fresh leaf yield (6.56kg, 6.87kg
and 7.14kg) per plot, dry leaf yield (1.35kg, 1.42kg and 1.48kg) per plot,
fresh leaf yield (13,498.47kg, 14,130.06kg and 14,498.48kg) per hectare,
dry leaf yield (2,780.92kg, 2,927.51kg and 3,041.11kg) per hectare of
three harvest and stevioside (11.68 %) content in the leaves of stevia.
Thus, from the present investigation, it can be concluded that
planting of stevia at 45 x 22.5 cm with the application of 70:35:45 kg
NPK per ha was found to be optimum.
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