The Russian, out of favour earlier in the season, capped a hard-working display with a thunderous drive from an acute angle in the seventh minute of stoppage time.
Reading went ahead early on when midfielder Danny Guthrie guided a long-range shot high into the roof of the net, but Doncaster levelled when substitute Theo Robinson latched on to a loose ball in the home area.
"I'm so pleased for Pavel, it was an absolutely super finish," Adkins said.
"He's been working so hard at the training ground. It's all been down to him, it's always up to the player to go and do it. He's now reaping the rewards.
"I thought he was oustanding today.
"We started the game extremely well and scored an unbelievable team goal. We never allowed Doncaster to play the ball around at all. But some players then stopped doing what they had been doing successfully.
"Still, four goals, three points and the fans will have gone home happy."