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杉木栽林地营造不同混交林的土壤酶活性具有明显的垂直分布特征,随着土壤剖面的深度增加,多种酶活性显著下降,一般以0—20厘米最为活跃,20—40厘米次之,40厘米以下的层次酶活性较弱。连栽多代杉木林地土壤酶活性下降较快,不同混交林地土壤酶活性下降较缓慢,各层次的土壤酶活性均表现出不同混交林地>连栽多代杉木纯林,不同混交林有所不同。 多种土壤酶活性的水平分布,随着距根系距离越近,活性越强,距根系的距离越远,活性越弱,且在水平地段上,不同混交林地均大于多代的杉木纯林,表现出混交林的良好改土作用,本文中以柳杉×薄姜木为最佳。
The activities of soil enzymes in different plantation mixed forests in Cunninghamia lanceolata plantations showed obvious vertical distribution. With the depth of soil profile increasing, the activities of many enzymes decreased significantly, which were most active in 0-20 cm, followed by 20-40 cm, 40 Hierarchical enzyme activity below centimeter is weak. The activity of soil enzymes decreased rapidly in the continuous-planting Chinese fir plantations, and the soil enzyme activities in different mixed forests decreased slowly. The activities of soil enzymes in all layers showed mixed plantation> multi-generation continuous-plantation Chinese fir plantations with different mixed forest . The distribution of soil enzyme activities in different soil types was higher with the distance from the root system, the stronger the activity, the farther the distance from the root system, the weaker the activity. In the horizontal plots, Mixed forest showed good soil improvement role, in this article to Crypt × thin ginger wood for the best.