http://kellymom.com/nutrition/starting-solids/solids-how/
Should solids replace breastmilk?
No. Solids during the first year are only meant to complement breastmilk, not take precedence over it or replace any breastfeedings. It is more of a way to add textures to the baby’s diet, to allow the baby new experiences, and to help her develop hand/eye coordination through finger feeding. Your baby should still be allowed to nurse on demand, as your milk should be her primary source of nutrition until closer to the end of the first year. Continuing to allow on-demand feedings also better ensures your milk supply.