Impact of industrial effluents on seed germination, early seedling vigor of rice (Oryza sativa L.) its sustainable use in agriculture

摘要: The present study aims to know the effect of various concentrations of industrial effluents on rice germination and early seedling vigor to find out the suitable concentration of effluents which could increase the germination of seeds and could be recommended for application in irrigation. The study revealed that lower concentrations of effluents showed the promoting effect on seed germination, seedling growth and dry matter accumulation. Maximum promoting effect was observed at 25% of effluents. NALCO effluents applied as such or at higher concentrations more than 25% elicited deleterious effects on germination and early seedling vigor. Photosynthetic pigments chlorophyll a and chlorophyll b along with the SPAD chlorophyll index of rice seedlings was increased at lower concentration (25%) of the effluent, while decreased at 100% concentration of effluents. The concentration of these effluents should be reduced to beneficial level by diluting the effluent, which can be used for irrigation purposes as a substitute for chemical fertilizers only after treatment and dilution for rice crop. This finding is encouraging for an agro-friendly disposal of this potential multiple-