Feel free to invite a response, ask for help or even not fully complete your thoughts on a post. This encourages people to respond; after all, this is a conversational not a broadcast medium. However, don’t worry if your posts are NOT getting replies, as 90% of internet users are passive readers who read without commenting.
It can be handy to have your own community of followers on Twitter/Facebook/etc so you can announce that you have a new blog post up – commenters are people who are interested in either the subject or you as a blogger.
Also, be reassured that company blogs are usually pre- or post-moderated for spam, rude responses or other comments breaching trade or company rules. Responses where people disagree, however, are generally seen as part of the conversation and offer great opportunities to respond, learn or even develop fresh blog post ideas.
[FYI: Last year I wrote a Blogger’s Style Guide to help people in the organisations I was working for start writing posts and publishing them on the company blog. Many had never written anything beyond an email before but they did know their subject far better than I, so they just needed a good briefing in style, tone, structure and so on. This is that starter kit for company bloggers, consisting of 10 mini-posts in all.]