| 摘要: |
| 比较了大穗型和多穗型小麦品种的光合生理特性。结果表明，与多穗型品种豫麦49相比，大穗型品种鲁麦91—3具有较好的光合源和光合能力，在整个灌浆期旗叶具有较高的净光合速率和蒸腾速率，灌浆中后期旗叶叶绿素含量较高，叶面积系数(LAI)衰减迟缓，叶片功能期较长。进一步提高大穗品种产量潜力的途径是，在保持或适当提高生物学产量的同时，较大幅度提高收获指数。 |
| 关键词: 小麦 大穗型 多穗型 光合生理特性 |
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| 基金项目:陕西省“九五”科技攻关项目(2002A241037) |
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| A comparative study on the photo-biological characters of two different spike-type cultivars in wheat |
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| Abstract: |
| The photo-biological characters of large-spike and multi-spike wheat cultivars were comparatively studied.The results indicated that,compared with multi-spike cultivars Yumai-49,large spike cultivars Lumai 91-3 had better quality of photosynthetic sources and ability of photosynthesis with higher net photosynthetic rate and transpiration rate of flag leaves during grain filling stage,higher chlorophyll content and lower decreasing of LAI in later stage,more accumulation of dry matter and lower harvest index.To improve the grain yields potential,one way is to increase its harvest index. |
| Key words: wheat large-spike-type,multi-spike-type photo-biological characters |
