EFFECT OF DAIRY EFFLUENT ON GROWTH AND PHYSIOLOGICAL PARAMETERS OF SELECTED CROPS
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Date
40767
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University of Agricultural Sciences GKVK, Bangalore
Abstract
Degree of toxicity of dairy effluent on seed germination and
seedling growth and biochemical parameters of four crops-Brassica
(Brassica rapa), Ragi (Eleusine coracana), cowpea (Vigna unguiculata) and
Soybean (Glycine max) were studied. The degree of toxicity depends upon
the nature and concentration of chemicals present in the effluent, as well
as the type of crops grown. The present investigation was carried out
with 4 (T1, T2, T3 and T4), with four replications each, with different
concentrations (100%, 75%, 50%, 25%) and (T5 and T6) with treated
effluent (carried out in Biofuel Laboratory and Mother Diary Treatment
Plant). They were used for irrigation respectively. Untreated and treated
effluent was analyzed for various physico-chemical parameters. The
untreated showed higher values of COD (1171.82 mg/L), BOD (634.06
mg/L), TDS (734.4 mg/L), Oil content (138.33 mg/L). However, the
toxicity of dairy effluent was more pronounced on seed germination in all
the four crops at higher concentration of dairy effluent. The percentage of
germination at 15 DAS, the growth parameters and biochemical
parameters at 30 DAS were found to be increased in 25 % dairy effluent
and decreased from 50% to 100%.Overall, the 25 % effect showed highest
and significant results in most of the parameters whereas treated
effluent, at mother dairy was given the best results compare to effluent
treated at Biofuel center laboratory (Sand+Clay+Ferric Chloride) the 25%
effluent concentration is suitable for irrigation. The present investigation
showed that, seed germination, growth parameters and biochemical
parameters can be assessed the degree of toxicity of industrial effluent.