NO, you can not recite without lengthening the vowels. I guess you are talking about the **Madd**s, if I'm not wrong.
If you are not careful about lengthening the vowels at the appropriate places, you'ld end up with very unexpected meanings. Say for example if you say Allahu AAAkbar, if you lengthen the ا then it would come up with a devastating meaning. {Is Allah Great? questioning Allah's greatness نعوذ بلله من ذالك}
So, its a must to strictly follow these Madds. And why should we not follow the Madds? It makes the recitations very appealing!
The qira'at that you follow in your country is the qira'at of Qari Hafs al Kufi, which is the most widespread qira'at in the world. All the people from all over the world follow this qira'at. It'd be more congenial and useful for you to spend time behind learning and if possible mastering the tajweed and the tarteel of the qira'at followed in your country.