Management and monitoring of environmental impact in the important headwater supply of Thailand
1992
Kasem Chunkao | Wicha Niyom | Samakkee Boonyawat | Sittichai Tantansarit | Pongsak Wittawatchutikul | Songtham Suksawang (Kasetsart Univ., Bangkok (Thailand). Faculty of Forestry. Dept. of Conservation)
Study on genera and number of bacteria and fungi in soil was conducted for study on the impact on soil microbiology in mixed deciduous logged area at Huay Linthin Changwat Kanchanaburi. Samples were collected at four times during December 1990 to September 1991. The results found that selecttive cutting system were not affected to bacterial and fungal number but there showed trend of microorganism number atter logging. Bacterial and fungal number were increased in logged area after logging 2 yrs., and decreased in logging area and logged area after logging 3 yrs. that changed was found correlated with organic matter content. In long time effect logging was deteriorated organic matter and increased pH of soil. Logging were not affected to bacterial and fungal genera because of bacterial and fungal genera were not different in each sample sites. Bacterial isolates classified to 6 genera were Bacillus, klebsiella, Micrococcus, Pseudomonas, Sporolactobacillus and Xanthomonas the most bacterial genus in each sample sites was Bacillus. Fungal isolates classifed to 11 genera were Absidia, Aspergillus, Circinella, Cunninghamella, Curvularia, Fusidium, Penicilluim, Rhizoctonia, Rhizopus, Sclerotium and Trichoderma. The most fungal genus in each sample sites was Aspergillus.
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