甜菜の光合成に関する研究 : 第1報 圃場条件下に於ける甜菜同化能力の変化

抄録

Experiments were carried out to investigate the photosynthetic activities of sugar beet plants. The results obtained are as follows: Each leaf of sugar beet plants had its own activity and the youngest matured leaf showed the highest activity. Photosynthetic amount per plant growing in the sugar beet plant community increased with enlargement of total leaf area but the amount did not increase at the same rate of enlargement of leaf area, then the ability decreased with reduction of total leaf area at maturing stage. Photosynthetic amount per 100 cm² (leaf area) became lower in proportion to enlargement of total leaf area and showed the lowest amount at the maximum leaf area. Consequently it may be concluded that the leaves were shaded with each other and the light receiving coefficient became lower at the most flourishing stage.