EFFECT OF INTEGRATED NUTRIENT MANAGEMENT AND ORGANIC FARMING PRACTICES ON YIELD AND QUALITY OF FLUE CURED VIRGINIA TOBACCO (Nicotiana tabacum L.)
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Date
2009-08-25
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University of Agricultural Sciences GKVK, Bangalore
Abstract
Field experiments were carried out on red loamy sand soil of Zonal
Agricultural Research Station, Navile, Shimoga, Karnataka during kharif seasons
of 2006 and 2007. The investigation involved two field experiments and one pot
culture experiment. In experiment-1, eight treatments were tried in a Randomized
Complete Block Design (RCBD) with three replications to study the effect of
integrated nutrient management in FCV tobacco to improve leaf yield and quality.
In experiment-2, twelve treatments were tried in RCBD with three replications to
study the effect of organic production of FCV tobacco for improving the quality of
tobacco leaves. In experiment-3 (pot culture experiment), ten treatments were tried
in CRD with three replications to study nutrient release pattern in the soil under
integrated nutrient management and organic FCV tobacco production.
In experiment-1, pooled data of two years indicated that 50% recommended
N through neem cake and 50 % through inorganic fertilizers recorded the highest
green leaf yield (10,150 kg ha-1), cured leaf yield (1416 kg ha-1) and top grade
equivalent yield (785 kg ha-1). All the treatments recorded acceptable limits of
chemical quality parameters. However, application of 50% recommended N
through neem cake and 50% through inorganic fertilizers recorded the highest
phosphorus, potassium and reducing sugars, lowest chloride and nicotine content in
'X' and 'L' position leaves.
In experiment-2, pooled data of two years indicated that recommended NPK
and 12.5 t ha-1 FYM (package of practices) recorded the highest cured leaf yield
(1340 kg ha-1) and top grade equivalent yield (775 kg ha-1) and was on par with
100% recommended N through vermicompost + maize stover + Azotobacter + PSB
(1275 kg ha-1 cured leaf yield and 742 kg ha-1 top grade equivalent yield).
However, application of 100% recommended N through vermicompost + maize
stover + Azotobacter + PSB recorded the highest potassium and reducing sugars
content, lowest chloride and nicotine content of 'X' and 'L' position leaves.
In pot culture experiment, data clearly indicated that application of neem
cake along with inorganic fertilizers under integrated nutrient management
practices and vermicompost and maize stover along with biofertilizers (Azotobacter
and Phosphorus solubilizing bacteria) under organic farming practices of FCV
tobacco help in release of nutrients steadily and make it available to the plants
during crop growth period.
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