Influence of textile industry waste water on soil microflora and plant growth of Indian mustard (Brassica juncea L.)
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Date
2017
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CCSHAU
Abstract
Due to increasing demand of food has brought more and more land under cultivation which
has focused the attention on irrigation water. Use of industrial waste water for irrigation purpose has
emerged as an important alternative. Textile industries are major source of these effluents due to the
nature of their operation, which require high volume of water that eventually results in high waste
water generation. Indiscriminate disposal of waste water may result in adverse impact on soil
microorganism and environmental health, which in turn affects soil productivity and its fertility. During
present investigation, untreated textile waste water was collected from Panipat textile mill (Haryana).
It was wine red in color with pH 7.3, EC 10.5 d sm-1, total carbon 200 mg l-1, nitrogen 12 mg l-1, BOD
420 mg l-1 and COD 830 mg l-1. The soil was amended with 10, 20 and 50% of textile waste water and
water holding capacity was maintained 60% and incubated at 30ºC up to 90 days and samples were
withdrawn at 30, 60 and 90 days of incubation for enumeration of microbial population. A significant
increase in bacterial population was observed up to 20% of textile waste water amendment at 60 days
of incubation and declined on further incubation. The actinomycetes count varied from 35 to 75× 102
cfu g-1 dry soil at different waste water concentrations and incubation time. The fungal population
varied from 40 to 79 ×104cfu g-1dry soil with different waste water concentration and incubation time.
Diazotrophs count varied 18 to 49×101 cfu g-1 dry soil at different concentration of incubation time.
Dehydrogenase activity increased with increase in incubation time upto 60 days and with 20% textile
waste water concentration, but decreased on further increase in incubation and waste water
concentration. The percent germination of seeds varied from 35 to 100% from 3rd to 5th day of
incubation. Less inhibition in seeds germination was observed at 10% waste water concentration in
comparison to 20, 50 and 100% of waste water concentration under laboratory conditions. Plant height,
dry weight of root and shoot were significantly higher in 10 and 20% textile waste water in both,
regular irrigation with textile waste water and always irrigated with textile waste water after
germination. Analysis of soils after harvest of mustard had more bacterial population than other
organism which varied from 25-80×106 cfu g-1 dry soil, 18-32×102 cfu g-1 dry soil, 15-40×101 cfu g-1
dry soil and 27-52×104 cfu g-1 dry soil respectively.
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