| 朱 荣， 虎芳芳， 李亚婷， 康建宏， 吴宏亮.花后干旱对春小麦光合特性及产量的影响[J].广东农业科学,2015,42(17):1-5 |
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花后干旱对春小麦光合特性及产量的影响 |
| Effects of drought after flowering on photosynthetic characteristics and yield of spring Wheat |
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| DOI： |
| 中文关键词: 春小麦 花后干旱 光合速率 产量 |
| 英文关键词: spring wheat drought after flowering photosynthetic rate yield |
| 基金项目:国家自然科学基金（31160255 |
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| 摘要点击次数: 1610 |
| 全文下载次数: 615 |
| 中文摘要: |
| 为研究花后干旱条件下春小麦光合特性及产量的变化， 测定了不同水分胁迫条件下小麦叶片各项
光合指标的变化。 结果表明： 旗叶的蒸腾速率、 气孔导度、 胞间 CO 2 浓度和水分利用效率随着干旱程度的加剧
变化显著， 光合速率下降 37.67%~86.45%； 重度和中度胁迫下 Pn 的下降主要是非气孔因素造成的， 而轻度胁
迫下是气孔关闭引起的， 最终导致植株早衰， 影响小麦籽粒灌浆， 使产量降低 10.70%~21.20%。 |
| 英文摘要: |
| In order to study the changes of characteristics and yield of spring wheat photosynthetic under drought after flowering， the changes of several photosynthetic index of spring wheat leaves under different water stress were measured. The results showed that the transpiration rate， stomatal conductance， intercellular CO 2 concentration and water use efficiency of flag leaf changed significantly as water stress increasing， so that the photosynthetic rate decreased by 37.67%-86.45%. The decline of Pn under serious and moderate water stress was mainly due to non-stomatal factors
and under light water stress it was because of the decline of stomatal conductance， which caused the wheat premature senescence and influenced the grain filling， so that the yield decreased by10.70%-21.20% |
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