| 赵永平，惠亚云，朱 亚，赵 盟，张 毅，付献欧，马雪莉.施氮对干旱胁迫紫苏叶绿素含量和光合作用的影响[J].广东农业科学,2019,46(10):63-68 |
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施氮对干旱胁迫紫苏叶绿素含量和光合作用的影响 |
| Effects of Nitrogen Application on Chlorophyll Content andPhotosynthesis of Perilla Frutescens under Drought Stress |
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| DOI：10.16768/j.issn.1004-874X.2019.10.010 |
| 中文关键词: 紫苏 施氮量 光合速率 气孔导度 蒸腾速率 胞间 CO2 浓度 干旱胁迫 |
| 英文关键词: perilla frutescens nitrogen application rate photosynthetic rate stomatal conductance transpiration rate intercellular CO2 concentration drought stress |
| 基金项目:商洛市博士科技创新团队项目（SK2017-45）；商洛学院高层次引进人才专项（14SKY027）；陕西省大学生创新创业训练项目（201811396004） |
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| 中文摘要: |
| 【目的】初步明确氮素对干旱胁迫条件下紫苏叶绿素和光合作用的影响。【方法】采用盆栽试验，
研究施氮对不同干旱胁迫处理不同品种紫苏叶绿素含量和光合指标变化的影响。【结果】各处理间叶绿素含量、
光合速率、气孔导度、蒸腾速率和胞间 CO2 浓度差异显著，不同干旱胁迫条件下叶绿素含量均随施氮量的增加而
升高，在轻度干旱胁迫处理施氮量超过 300 kg/hm2 时，TD-S-1 品种叶绿素含量呈现下降趋势，而 LS-Y-1 品种呈
现继续升高的趋势。TD-S-1 和 LS-Y-1 均在轻度干旱胁迫施氮量为 300 kg/hm2 时，光合速率最大，较不施氮处理
分别提高 1.39 倍和 1.29 倍，与气孔导度和蒸腾速率的变化趋势基本一致，而胞间 CO2 浓度均最低。【结论】轻
度干旱胁迫条件下，施氮量达到 300 kg/hm2 对提高紫苏的光合作用具有一定的促进作用。 |
| 英文摘要: |
| 【Objective】The effect of nitrogen on chlorophyll and photosynthesis of perilla frutescens under
drought stress was preliminarily determine.【Method】The effects of nitrogen application on the chlorophyll content and
photosynthetic index of different varieties of perilla frutescens under different drought stress were studied by pot experiment.
【Result】The results showed that the chlorophyll content, photosynthetic rate, transpiration rate, stomatal conductance and
intercellular CO2 concentration differed significantly under various drought stress conditions. The chlorophyll content were
increased with the increase of N application. With N application amount of more than 300 kg/hm2 under mild drought stress
treatment, chlorophyll content of TD-S-1 presented a downward trend, and that of LS-Y-1 continued to rise. TD-S-1 and
LS-Y-1 had the highest photosynthetic rate when the nitrogen application amount was 300 kg/hm2 under mild drought stress,
which was 1.39 times and 1.29 times higher than that without nitrogen application, respectively. The change trend of stomatal
conductance and transpiration rate was consistent with that of photosynthetic rate, and the intercellular CO2 concentration
was the lowest. 【Conclusion】It can be concluded that under mild drought stress, nitrogen application of 300 kg/hm2 has a
certain promoting effect on improving photosynthesis of perilla frutescens. |
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