The charge of MgSO_4(calculated as Mg~(2+)) was: 0.02% (bagasse), or 0.04% (bamboo), while wheat straw pulp did not need to add Mg~(2+) due to the high Mg~(2+) content in pulp.

• H_2O_2漂段MgSO_4的合适用量(以Mg~(2+)计)为：蔗渣浆0.；02%25，竹子浆0