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Three soybean cultivars, Hefeng25 (HF25), Suinong14 (SN14) and Longxuan1 (LX1) were used as materials and the accumulation features of carbohydrates were studied in leaves and stems. The results showed that the soluble sugar content in leaves and stems appeared the same trend of higher-lower-higher in three varieties. The changes of sucrose content in leaves appeared the same rule with that of soluble sugar, that is higher-lower-higher, while presented a rising trend in stems. The content of starch in leaves varied as a change of double apexes. The content of starch in stems appeared a change of single apex. In the same stage, there were some differences among carbohydrates. The content of soluble sugar and sucrose in SN14 was higher, and the starch content was lower.
The results showed the the soluble sugar content in leaves and stems. The same the same the same sugar and soluble sugar content in leaves and stems. the changes of sucrose content in leaves have the same rule with that of soluble sugar, that is higher-lower-higher, while presented a rising trend in stems. The content of starch in leaves The content of starch in stems appeared a change of single apex. In the same stage, there were some differences among carbohydrates. The content of soluble sugar and sucrose in SN14 was higher, and the starch content was lower.