Effect of pine sawdust on the structure of fungi communities in the soils of post agricultural land

Abstract

This paper presents the results of mycological studies of soils left barren for 15,6 and 3 years before and after addition of pine sawdust. Considerable differences in thc species composition of fungi communities were found related both to the type of soil (period of lying barren) and treatment. Before the treatment the soil was dominated by such species as Paecilomyces lilacinus, P. marquandi, Apiospora montagnei, Pseudogumnnnoscus roseus, Penicillium janczewskii, P. jensenii, while after a year following addition of sawdust by Trichoderma harzinum, T. pubescens, T. virens and numerous species of Penicillium. The presence of Trichoderma species, comprising over 60% of the communities after the treatment indicated the possibility of creating conditions for efficient protective action against root infection of trees by Heterobasidion unnosum (a cause of dangerous destruction in forests growing on post agricultural land in Poland).