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在赤杨纯林和赤杨——花旗松混交林地中,土壤磷酸酶活性比其它纯林(花旗松或美国黄松,小干松,北美西部桧柏)及牧场地明显地偏高。
Phytase activity in soil was significantly higher than that in other pure forests (Douglas fir, Pinus thunbergii, Pinus thunbergii, Hinoki cypress in Western North America) and pasture in mixed stands of Alnus cremastogyne and Alnus japonicus-Douglas fir mixed forest.