Pollution Research Paper

Vol. 35, Issue 1, 2016; Page No.(137-143 )

IMPACT OF DISTILLERY SPENTWASH ON NUTRIENT UPTAKE OF VIGNA RADIATA

M. THARAKESHWARI1 AND SHOBHA JAGANNATH

Abstract

The present investigation was carried out to evaluate the suitability of spentwash at different concentrations on nutrient uptake (N,P,K,) of Vigna radiata crop plant. The physico – chemical analysis of the spentwash showed high alkalinity (8.41) with high BOD (2100mg/L), COD (9561mg/ L) contents, Total dissolved solids (22560 mg/L) and Total suspended solids (21566mg/L). The experiment was formulated with four effluent concentrations (T2, T3, T4, T5) and set of control (T1), with three replicates. The study reveals that the spent wash decreases nutrient uptake in all the effluent treatments except T2 treatment which enhances uptake when compared to control. The Nitrogen uptake was maximum in leaves of fruiting stages at T2 conc. Nitrogen (4.90), Phosphorus (0.28 7), Potassium ( 3.73 ) in stem and minimum at vegetative stage at T5 conc. in roots such as N (1.07), P(0.05 ), K (0.28 ).It is suggested that the treated distillery effluent be used for irrigation purpose after proper dilution . Monitoring and integrated approaches are needed to effectively utilize distillery effluent as valuable resource in agriculture.

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