Wednesday, November 15, 2006
284-3
Distribution of Arbuscular Mycorrhizal Fungi in Upland Field Soil of Japan.
Katsunori Isobe, Hanae Sugimura, Takashi Maeshima, and Ryuichi Ishii. Nihon University, 1866 Kameino, Fujisawa, 254-0061, Japan
In this study, soil samples from upland fields where corn and soybeans had been cultivated were collected and the number of AM fungal spores and the infection level of crop roots assessed to determine which factors of the soil environment caused these parameters to change. The spore density of soybean field soil showed the negative correlation with the available phosphorus content, and showed the positive correlation with the phosphate adsorption coefficient. Each correlation coefficient is r=-0.833, r=0.699, and it was significant by 1% and 5% level, respectively. The spore density of maize field soil showed the positive correlation with the phosphate adsorption coefficient. The correlation coefficient is r=0.894, and it was significant by 1% level. The infection rate showed the positive correlation with spore density, and showed the negative correlation with the availability phosphorus content. Each correlation coefficient is r=-0.904, r=0.724, and it was significant by 0.1% and 5% level, respectively.