It happened on the B3081 near Verwood - he had to be cut free by firefighters.
Man Stabbed in Boscombe
Two men arrested on suspicion of attempted murder, after a man was seriously assaulted in Boscombe, have been bailed.
Police were called to Palmerston Road at around 11.45pm on Friday 3 June following reports of a stabbing. A police cordon was put in place around Palmerston Road as officers are still looking for a knife.
A 21-year-old man has had surgery at Poole Hospital.
Detectives in Bournemouth are appealing for witnesses and anyone with information.
Police were called to Palmerston Road at around 11.45pm on Friday 3 June 2016 following reports of a stabbing.
It was reported that a man was seen carrying a knife near to the scene.
The victim, a 21-year-old man from London, was taken to Poole Hospital for surgery on puncture wounds to his arm and abdomen.
Detective Sergeant Andy Haworth, of Bournemouth CID, said: “I am appealing to anyone who saw the incident or anything suspicious in the area at the time to please contact me.
"The weapon used is still outstanding and may have been discarded locally. If you do see a knife or similar object, please do not touch it and contact police immediately.
"A cordon has been put in place while officers make enquiries and there will continue to be a police presence in the area as part of the investigation and to offer reassurance to the public."
The 38-year-old man from Poole and 46-year-old man from Bournemouth, arrested on suspicion of attempted murder, have been released on police bail until the beginning of July 2016 pending further enquiries.
Witnesses and anyone with information should call Dorset Police in confidence on 101 quoting incident number 3:499. Alternatively, call the free and anonymous Crimestoppers line on 0800 555 111 where mobile phone tariffs may apply.
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