| 摘要: |
| 1994～1997年田间连续测定表明,春型杂种小麦品种“901”的光合特性明显不同于常规小麦品种陕229和小偃6号。杂种小麦的叶源量大,功能期长,衰老缓慢,顶三叶的净光合速率差异小。从抽穗期到灌浆末期,杂种小麦的旗叶、倒二叶和倒三叶的净光合速率变幅分别为9. 66～17. 82, 9. 66～17. 68和4. 61～12. 37μmol/(m2·s),平均值分别为13. 61,13. 74和9. 01μmol/(m2·s);越到生育后期,杂种小麦的光合优势越明显。蒸腾作用和气孔传导等也有类似趋势。 |
| 关键词: 杂种小麦,光合作用,蒸腾作用,气孔传导 |
| DOI： |
| 分类号:S512.101 |
| 基金项目:国家自然科学基金资助项目（39570411） |
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| Study on the Photosynthetic Character of Hybrid Wheat“901” |
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| Abstract: |
| Through three years field experiment, it is found that the photosynthetic
character of hybrid wheat“901”is obviously different from that of common wheat Shaan
229 and Xiaoyan 6.Compared with common wheat, the hybrid wheath as larger effective
photosynthetic area and longer leaf function duration. The difference of photosynthesis
among the flag leaf, the second leaf and the third leaf of the hybrid wheat is smaller than
those of common wheat.From the stage of heading to the end of milk stage, the net photosynthetic rates of the three main function leaves are 9. 66-17. 82μmol·m-2·s-1,
9. 66-17. 68μmol·m-2·s-1 and 4. 61-12. 37μmol·m-2·s-1, and the average are
13. 61μmol·m-2·s-1, 13. 74μmol·m-2·s-1 and 9. 01μmol·m-2·s-1, respectively.
The later the growth stage is, the more obvious superior of hybrid wheat shows. The
transpiration and stomatal conductance are similar to photosynthetic characters. |
| Key words: hybrid wheat,photosynthesis,transpiration,stomatal conductance, |
