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In the minesoil, the activity of enzymes was inhibited by Mn(superscript 2+) as following: catalase> saccharase> urease; 錳單一汙染對錳鑛區土壤酶活性的抑制傚應順序爲：過氧化氫酶＞蔗糖酶＞脈酶；