不同地带沙丘结皮层的土壤酶活性

Activities of Soil Enzymes in Sand Dune Crust of Different Zones

在干旱的西部地区,从东到西虽然地带不同、生态环境不同,但都是固定沙丘、沙地的结皮层或表层的土壤酶活性最强,结皮层最厚,韧性也最强。半固定沙丘、沙地的结皮层或表层土壤酶活性、结皮层厚度和韧性居中。流动沙丘土壤酶活性最低,沙丘表层仍是松散的沙土。

In spite of the fact that the western arid regions are different in zonality and ecological environments from east t?west, but the activities of soil enzymes in surface layer, crust thickness and toughness of all stabilized sand dunes are highest as compared with semi-fixed and shifting sand dunes; while those in crusts of semi-fixed sand dunes and shifting sand dunes rank moderate and least respectively, in addtion to the shifting sand dunes remain their loose surface.