"The Census figures have sent out warning signals. Time has come that an effective law to control population be made and uniform civil code implemented to ensure national unity and integrity," Adityanath said in a statement.
He termed the decline in Hindu's share, which has dipped to below 80 per cent of the total population, and rise in Muslim's a "dangerous trend".
Speaking to reporters, he demanded corrective measures to deal with it. Pressing for a common population policy, Jain also urged Muslims to adopt family planning.
Though Muslim's share in the population has increased, its growth rate showed a downward trend compared to the previous decade.