Daytime sleeping

[Rach80]

Hi ,
My bubba doesn't like to sleep through the day and on the odd occassion she will have a 20 min "power nap" but that would be 3 times a day at the most! If i try and put her down for another sleep when she has fallen asleep on me she wakes up as soon as her head hits the cot..She sleeps well through the night and recently from 6ish till 5am (Very happy about that!) Should she be sleeping alot longer through the day? My early childhood centre nurse told me she should sleep for alot longer through the day as if I didn't it would effected her night time sleeping? Although i'm not sure how!She has been like this since came home and is now almost 8mths old (6 months corrected). Any suggestions on how I can get her to sleep longer through the day?
Cheers
Rach