Daka started up front instead of Vardy for Sunday's 4-0 victory over Newcastle.
Given Vardy will turn 35 next month, Rodgers wants to preserve his energy.
He told reporters: "We have an unbelievable striker in Jamie Vardy but he is human so we have to look after him.
"Patson Daka is very important for us. He is a great goalscorer and he showed that."