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Probably at boot it has no network access and the mounting only tries it once.
Check this article: http://linoxide.com/file-system/example-linux-nfs-mount-entry-in-fstab-etcfstab/
For example, it uses “hard” to continue trying to connect to the nfs server if it fails at first. “timeo=n” as the time it waits before retrying to connect, etc.
If you were to use most of the parameters suggested by the article author, your fstab entry should look like:
192.168.0.1:/user_area /home nfs rw,hard,intr,timeo=14 0 0
antiX Live system enthusiast.
General Live Boot Parameters for antiX.