Abstract

Primarily, this study was conducted to find out the effects of phosphorus to reduce arsenic uptake by paddy under hydroponic system with Hoagland solution for better understanding and to nullify the effects of soil. Results showed that shoot height, shoot fresh and dry weight significantly reduced due to application of arsenic (As). Numbers of leaves not show any significant decrease due to As. Application of phosphorus (P) at 40 ppm over 10 ppm of As significantly increased plant height by 79.42%, shoot fresh weight by 35.83% and shoot dry weight by 56.41% when compared to the treatment which received only 10 ppm of As. Phosphorous application at 40 ppm also resulted in increase in root length by 96.14%, root fresh weight by 12.63% and root dry weight 14.81%. Increased dose of P improved N and K content and also increased P content by 80.95% as compare with no application of P in shoot. Maximum content of As of 931 μg kg^-1 was found in the treatment T₁ which received only As 10 ppm. But when P was applied at 40 ppm, it reduced the As content in paddy shoot to 548.67 μg kg^-1 and by 69.68%. Treatment T₉ had 4.45 times more P content and 23.27% increase in root K content as compared to without any P application in T₁. Beside these, P at 40 ppm highly reduced root As content in T₉ by 2.09 times than in T₁ where no P was applied.

Chattopadhyay, A., Singh, A.P., Mondal, T., 2024. Effect of Phosphorus in Alleviating Arsenic Toxicity in Paddy (Oryza sativa L.) under Hydroponic System. Research Biotica, 2024, online first.