Use the following code on terminal to enable of disable –
gsettings set org.gnome.desktop.background show-desktop-icons true
gsettings set org.gnome.desktop.background show-desktop-icons false
gsettings set org.gnome.nautilus.desktop home-icon-visible true
gsettings set org.gnome.nautilus.desktop home-icon-visible false
gsettings set org.gnome.nautilus.desktop trash-icon-visible true
gsettings set org.gnome.nautilus.desktop trash-icon-visible false
