Effect of organic and Inorganic Sources of Nutrients on soil Fertility and Yield of Brinjal (Solanum melongena L.)
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Date
2013
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UAS, Dharwad
Abstract
A field experiment was conducted to investigation “The effect of organic and
inorganic sources of nutrients on soil fertility and yield of brinjal” during kharif 2010 at the
MARS, UAS, Dharwad. The experiment was laid out in Typic Haplustert under irrigation in
RBD with nine treatments replicating thrice. The treatments included were RDF with and
without FYM, 100 and 75 per cent organics, INM (50% organics + 50% inorganic fertilizers)
and liquid organics like beejamrutha, jeevamrutha and panchagavya alone and in combination
with above treatments except RPP and RDF.
The results revealed that the treatment with RDF+FYM recorded significantly higher
fruit yield (5.24 t ha-1) and it was on par with RDF and organics and chemical fertilizers
applied each at 50 per cent level either alone or with liquid organics. The uptake of nutrients
like nitrogen, phosphorus, potassium and sulphur and micronutrients namely copper, iron,
manganese and zinc increased significantly due to application of part of recommended
nitrogen through organics. The available nitrogen, phosphorus, potassium and sulphur and
DTPA extractable micronutrients namely copper, iron, manganese and zinc status of soil was
significantly influenced by the application of chemical fertilizers along with organics and the
maximum values were recorded in the treatment receiving RDF+FYM. Dehydrogenase
enzyme activity in soil was higher in the treatments with FYM and vermicompost applied
along with chemical fertilizers and the highest value was recorded in the treatment receiving
RDF+FYM (40.90 ıg TPF/g soil/day).
Thus, the study emphasizes that in brinjal cultivation, chemical fertilizers can be
substituted with FYM and vermicompost without losing appreciable fruit yield. This also
improves the soil fertility and quality of fruit in addition to saving 50 per cent cost on
chemical fertilizers. The findings assume greater significance in the present context where in
the development of multi-nutrients deficiency in soil and scaling up of the cost of chemical
fertilizers severely limiting crop productivity.