土壤生态环境对木霉生存的影响

Effect of Soil Ecological Environment on Survival of Trichoderma

通过对山东省不同地区不同植被下土壤中木霉数量测定,结果表明,自然保护地带、有机质多的土壤木霉量多,为2.04万个/g干土,占真菌总数的6.86%;氧气密集处的土壤木霉量多,为1.8万个/g干土;有农药、化肥等污染的土壤或极端环境的土壤木霉量少,比如棉花地55个/g干土。聚类分析不同土壤生态环境木霉的数量,生态区分为五大类,分别为一般农作物土壤、贫瘠土壤、蔬菜和绿化地水分较足土壤、草地和温室及保护地水分充足土壤、有机质丰富的常绿山林。因此,不同生态环境的土壤对木霉的生存影响很大。

The amount of Trichoderma in soil with different vegetation in Shandong province was determined. The results showed that in natural protection land soil with more organic matter,there was more Trichoderma,with the amount of 20 400 per gram in dry soil,and which accounted for 6.86% of total fungus. In the soil with more oxygen, there was more Trichoderma, with the amount of 18 000 per gram in dry soil. In the soil polluted by pesticide or chemical fertilizer,or in the extreme poor soil environment,the amount of Trichoderma was small,for example 55 per gram in dry soil of cotton land. The cluster analysis of the amount of Trichoderma in different soil ecological environment indicated that there were 5 types of ecological environment：cultivated land soil,poor soil ,vegetation or greenbelt soil,grassland or greenhouse soil ,and evergreen forest soil. It is concluded that different soil environment may greatly affect the survival of Trichoderma.