The Royals were undone by two goals in two minutes at Carrow Road and, despite pulling a goal back late in the game, they were unable to recover.
Adkins' side could now be consigned to the Championship before they play QPR next Sunday if results go against them.
He told Sky Sports: "I thought we did well first half but it was disappointing how we started the second half.
"We said it was important how we dealt with the balls they play into the box and the physicality and we did it well for the most part.
"But for that 15-minute spell we just couldn't deal with them - that led to the two goals."
But, despite their predicament, Adkins vowed there would be no let-up in the work rate of his players.
He continued: "At the end of the day we've lost a game of football. We're in a poor position in the league. We can look at it and take positives from it but we've lost.
"We carry on. The players worked hard and showed a lot of endeavour and we'll keep working hard.
"We'll analyse this game, learn the lessons from it and get ready for the next game."