Man of the match Jack Levy scored 75 and took 3-20 for Longparish, for whom opener Will de Cani (59) made a half-century.
Parish’s 259-9, cemented around a 91-run stand between De Cani and Ben Gardner (28), owed much to Levy and James Bevan (26), who lifted the total from a worrying mid-innings 120-6 (Steve Tilbury 3-42). New Milton waved the flag of surrender at 110 all out.
The other two promoted sides from County 2 experienced mixed fortunes.
Hythe & Dibden were dismantled for 89 and beaten by nine wickets by Hook & Newnham Basics II, who are expected to be one of the strong teams.
Colin Lye (3-17) and Kish Parmar (3-16) did the damage for Hook, for whom Nick Willcock hit an unbeaten 51.
United Services, who led the CD1 field for much of last season, posted 255-9 – a total Rowledge seconds surpassed seven wickets down.
Mark Toogood’s 124 not out went unrewarded for US – Ollie Baker making an important 70 in the successful Rowledge run chase.
Steve Berryman, left, who won the CD1 batting award last season, carried off where he left off with an unbeaten 87 as St Cross Symondians III rattled up 276-6 (Pranay Rathod 65) at Shrewton.
Chris Brewer, having taken 3-34, responded with 69 but the Shrews fell well short at 229 all out (Will Sleeman 40), Rathod and Alex Henshaw sharing six of the scalps.
It was a mixed opening day too for the Isle of Wight sides.
Relegated Ryde won at Fareham & Crofton, but Ventnor experienced an afternoon of horrendous proportions at Lymington.
It was pure carnage at the Sports Ground, where domiciled New Zealander Terry Crabb (204) cracked a double century and Oli Kelly made 106 in a 351-run opening stand as Lymington piled up 417-4.
Busiest person on the pitch was Hampshire’s locum PA announcer Tony ‘Golden Gamble’ Wharton, who spent the afternoon signalling fours and sixes.
“I needed a massage after all that,” he laughed.
Ventnor’s torment didn’t end there, Australian Billy Quigley, Trevor Phillips and Southampton University’s Dimitri Adams taking three wickets each as they were bowled out for 104.
Left-arm spinner Morgan twirled away with 5-27, but Fareham got nowhere near Ryde’s modest 175, with only Tom Kent (49) making an impact in a disappointing 125 all out.
Sam Costley, with an unbeaten 83, and Tom George (65) guided OTs & Romsey II to a four-wicket win at Bishops Waltham, who posted 233-9 (Gareth Lovett 73).
Alex Stogden celebrated his debut as Ropley captain with an unbeaten 123 and shared a big stand with Australian Jack Ireland (89) in the village side’s 327-5.
Simon Bevis (83) responded in Burridge’s 220 all out.
Matt Benfield (59) and Jack Davies (52) scored half-centuries as title favourites Portsmouth & Southsea cantered to an eight-wicket win over Sarisbury Athletic (160).