STUDIES ON CONTRIBUTION OF VAMF TOP NUTRITION OF BRINJAL (Solanummelongenal) IN AN ALFISOL
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Date
1996
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University of Agricultural Sciences, Bangalore
Abstract
A field experiment was conducted at Olericulture section, Division of Horticulture, University of Agricultural Sciences, Dharwad during summer season of 1995-96 to study the contribution of vesicular arbuscular mycorrhizal fungus (VAMF) to phosphorus nutrition of brinjal in an alfisol. The experiment was laid out in factorial randomised block design with eight treatment combinations, comprising of four phosphorus levels (0, 50, 75 and 100 kg P2O5 per ha) with and without VAMF inoculation. The treatments were replicated three times.Inoculated plants produced significantly higher fruit yield of brinjal (57.00 t/ha) than uninoculated plants (46.08 t/ha) as a result of higher growth and yield components, higher drymatter production, higher per cent root colonization, spore count and higher P, Cu, Fe, Zn and Mn uptake.Application of 75 kg P2O5 per ha recorded higher fruit yield (56.50 t/ha) and it was 26.48 and 5.61 per cent higher over control (44.67 t/ha) and 100 kg P2O5 per ha (53.50 t/ha). Higher yield was found to be consequence of higher fruit volume, fruit weight, higher dry matter accumulation and higher P uptake by the plants.Combined application of VAMF and 75 kg P2O5 per ha (M1P75) produced significantly by the highest fruit yield (65.00 t/ha) over any other treatment combination. Not only that it also helped to improve certain quality parameters such as total soluble sugars, free phenols and crude protein content of the fruits. Thus indicating the usefulness of VAMF (Glomus fasciculatum) in reducing the phosphorus application to brinjal crop by 25 per cent.The economic analysis clearly indicated that, net returns and B:C ratio at M1P75 was the highest (Rs.17250.00 per ha and 3.14 respectively) in maki7ng this production practice more profitable.
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