蚕豆幼苗在光照条件下所吸收的磷素营养明显大于黑暗条件， 并随时间延长差异增大．磷素在蚕豆植株中的分配为根＞ 茎＞ 叶． 光照组叶片吸收的３２ Ｐ 量占全株的百分数大于黑暗组， 并且两组叶片的吸收量差异显著． 增供 Ｃ Ｏ２ 的植株吸收的３２ Ｐ 较缺 Ｃ Ｏ２ 的多， 在叶、茎上的分配量也大于缺 Ｃ Ｏ２ 的植株． Broad bean seedlings under the light conditions absorbed phosphorus nutrition was significantly greater than the dark conditions, and with time difference increased. The distribution of phosphorus in Vicia faba plants was root> stem> leaf. The percentage of 32 P absorbed by the leaves of the light group was higher than that of the dark group, and the difference was significant between the two groups. 32 P uptake by plants fed C O2 was greater than that of C O2, and more on leaf and stem than in plants lacking C O2.