缙云山马尾松林地土壤真菌的纤维素酶活性研究

Cellulaseactivities of Fungi in Forest Soil under Different Pinusmassoniana Lamb Stands in Jinyun Mountain

在重庆市缙云山马尾松林地里按海拔及坡向设置了6个样地,检测分析了土壤中的纤维素分解菌数量和纤维素酶活性。结果表明:海拔高低显著影响马尾松林地的纤维素分解菌数量及纤维素酶活性。海拔越低纤维素分解菌数量越高,低海拔下的土壤纤维素分解菌数量是高、中两个海拔下的38和8.6倍,坡向对纤维素分解菌数量无显著影响;而Cx酶活性与滤纸酶活性则是在中海拔时最高,且3种海拔下都是阴坡高于阳坡;6个样地的滤纸酶活性均在6天时最高,但Cx酶活性最高的培养时间因海拔和坡向而异。

In ordex to detect and analyze the number of cellulose degradation fungi and its celluase activities, 6 sample plots were set in mas- son pine forest according to both altitude and slope aspect in Jinyun Mountain in Chonsqing. Results showed that number of cellulose degra- dation fungi and its celluase activities were affected significantly by the factor altitude; the factor dope aspect also influenced the activities of CMCase and FPA while it did not have the same effect on the number of cellulose degradation fungi. The higher the altitude of the sample plot was in, the more fungi it had, and the number of fungi in the lowest altitude was 38 times and 8.6 times than those of fungi in the high- est altitude and the middle altitude, respectively. The highest activity of both CMCase and FPA appeared in the middle altitude and sunny slope. The highest activities of FPA from 6 sample plots were all discovered in the sixth day during the culture process, while those of CM- Case did not come out in the same day, some in the fifth day, some in the sixth day, others may be in the seventh day, varied with different altitudes and dope aspects.