  We apply the existence and special properties of Gauduchon metrics to give
several applications. The first one is concerned with the implications of
algebro-geometric nature under the existence of a Hermitian metric with
nonnegative holomorphic sectional curvature. The second one is to show the
non-existence of holomorphic sections on Hermitian vector bundles under certain
conditions. The third one is to give a restriction on the
$\partial\bar{\partial}$-closedness of some real $(n-1,n-1)$-forms on compact
complex manifolds.
