对木麻黄湿地松混交林的根际土壤养分及酶活性进行测定,结果表明:混交林根际与非根际土壤pH值均呈下降,加剧了土壤酸化。速效钾除外,混交林中木麻黄根际各种矿质养分含量都小于对应的纯林;土壤阳离子交换总量减小,土壤营养贮量和养分供应能力有所下降。多酚氧化酶除外,根际土壤脲酶、磷酸酶、过氧化物酶活性混交林中小于纯林。混交后木麻黄在促进湿地松生长的同时可能对自身的生长不利,在沿海沙地营造木麻黄湿地松混交林,两树种均对土壤养分的过量索取可能会加剧地力的退化。Soil chemical properties and biochemical activities between the rhizosphere and non-rhizosphere soil in different stands of Casuarina equisetifolia was researched.The chief results are as follows:the pH value in rhizosphere and non-rhizosphere soil of mixed stand went down and the soil acidification increased.Except for available K,the contents of mineral nutrient in the rhizosphere soil of mixed stand were lower than those of pure C.equisetifolia stand.In C.equisetifolia-P.elliotti mixed plantation,CEC minished,nutrient-holding and providing capacities of soil was diclined.Uresese,phosphataese and peroxidase of rhizosphere soil in mixed stand were less active than those in pure C.equisetifolia stand,except for polyphenol oxidase.C.equisetifolia of mixed plantation was harmful to itself growth while conduce to P.elliotti growth.国家“十五”科技攻关项目(2004BA516A13-15
