The present invention relates to a two-staged method of increasing free phosphorus in vegetable feeding stuff, which is characterized by treating the plant feeding stuff with Aspergillus oryzae to destroy the cell wall of the vegetable feeding stuff to release phytic acid, and then digesting the released phytic acid with phytase to release free phosphorus.本發明係關於一種利用米麴菌與植酸酶進行兩階段式提高植物性飼料中游離態磷含量之方法，特徵在於先以米麴菌將植物細胞壁表面結構分解破壞並釋出植酸，然後再加入植酸酶有效率分解植酸，而大量釋出游離磷。
