IMPACT OF RICE STRAW BURNING METHODS ON SOIL TEMPERATURE AND MICROORGANISM DISTRIBUTION IN THE PADDY SOIL ECOSYSTEMS

This paper presents the impact of rice straw burning methods (dispersive and intensive) on soil temperature and microorganisms. The results showed that, burning methods have different impact on the soil microorganisms. The direct burning method on rice field increased the soil temperature, especially at the topsoil layer. Nowadays, rice straws are commonly burnt by two methods, which are here named as intensive (piled) and dispersive burning. These both methods had decreased the number of soil microorganisms. The soil temperature caused by intensive was higher than dispersive burning. Consequently, the impact on microorganism by the intensive is stronger than dispersive burning. However, due to the intensive burning should be on a small dot, the recover of microorganisms after intensive burning was better than dispersive burning.