抄録
The inputs and outputs of manganese flux in a tea field are estimated. The total input of manganese into the field is estimated at 12 kg · ha-1 · y-1, which is due to applied manure and fallen or cut leaves and branches. The total output is estimated at 49 kg · ha-1 · y-1, which is due to harvest, surface runoff and interflow (spring water), infiltration and absorption. As a result, the amount of manganese taken out of the field is estimated at 37 kg · ha-1 · y-1, most of which is included in surface runoff and interflow. The manganese content of the soil in the tea field is 850 μg · (g-dry)-1. Assuming that the density of the soil and the depth of soil are 2.5g · cm-3 and 90 cm, respectively, it is estimated that the total manganese content of the soil in the field is 140 t. The total amount of manganese taken out of the field is estimated at 278 kg · y-1. This value is 0.20 % of the total manganese content of the soil and does not have a significant effect on the manganese content of the soil.
