| 高海拔旱地油菜开花盛期光合生理特性研究 |
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| 引用本文： | 蒋菊芳 陈雷 魏育国 丁文魁 马兴祥. 高海拔旱地油菜开花盛期光合生理特性研究[J]. 中国农学通报, 2012, 28(15): 56-61. DOI: 10.11924/j.issn.1000-6850.2011-3213 |
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| 作者姓名： | 蒋菊芳 陈雷 魏育国 丁文魁 马兴祥 |
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| 作者单位： | 1. 中国气象局兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局干旱气候变化与减灾开放实验室,兰州730020;甘肃省武威市气象局农业气象试验站,甘肃武威733000
2. 甘肃省武威市气象局农业气象试验站,甘肃武威,733000 |
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| 基金项目： | 国家重大科学研究计划(2012CB955304、2010CB951302);国家科技部气象行业专项(GY-HY200806021、GYHY201106029) |
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| 摘 要： | 为了探索气候变化对作物光合生理特性的影响，在油菜开花盛期，采用LI-6400便携式光合仪测定祁连山高海拔旱地环境因子和油菜叶片光合生理指标，并分析油菜光合生理指标在不同年型、不同播期的差异。结果表明：油菜叶片净光合速率日变化呈双峰型曲线，存在“午休”现象，且上午的光合速率高于下午。油菜的蒸腾速率日变化呈双峰型曲线，气孔导度日变化大体呈“S”型曲线。而光合有效辐射和空气温度均呈单峰型日变化曲线，而空气湿度呈“S”型日变化曲线。通过显著性相关分析，油菜开花盛期光合有效辐射是影响叶片净光合速率的主导环境因子之一(R2=0.6916)，光合有效辐射和空气温度是蒸腾速率的主导影响因子之一(RPAR2=0.7133，RT2=0.5611)，空气湿度是气孔导度的主导影响因子之一(R2=0.5503)。湿润年油菜不论是外在环境还是植株体内在环境均处于适宜状态，作物各项光合参数均高于干旱年。分期播种的油菜叶片蒸腾速率表现出极显著性差异（P<0.001），净光合速率、气孔导度差异显著（P<0.05），细胞间隙CO2浓度差异不显著。
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| 关 键 词： | 植物 植物 |
| 收稿时间： | 2011-11-02 |
| 修稿时间： | 2011-12-21 |
Study on the Photosynthetic Physiology Characteristics of Blooming Rape in the High Altitude Dryland |
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| Jiang Jufang , Chen Lei , Wei Yuguo , Ding Wenkui , Ma Xingxiang. Study on the Photosynthetic Physiology Characteristics of Blooming Rape in the High Altitude Dryland[J]. Chinese Agricultural Science Bulletin, 2012, 28(15): 56-61. DOI: 10.11924/j.issn.1000-6850.2011-3213 |
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| Authors: | Jiang Jufang Chen Lei Wei Yuguo Ding Wenkui Ma Xingxiang |
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| Affiliation: | 1Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Open Laboratory of Arid Change and Disaster Reducing of CMA,Institute of Arid Meteorology/China Meteorological Administration,Lanzhou 730020;2Agriculture Station of Wuwei Meteorological Bureau City of Gansu Province,Wuwei Gansu 733000) |
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| Abstract: | In order to explore the influence on climate change to crop’s photosynthetic physiology characteristics,the environmental factors and rape’s photosynthetic physiology indexes were measured by using LI-6400 portable photosynthesis system in rape blooming period.The rape’s photosynthetic physiology index’s difference was studied in different years and in different sowings.The results showed that: diurnal change of rape leaf’s net photosynthetic rate presented a bimodal pattern,and had a midday depression,also morning’s net photosynthetic rate high to afternoon’s.The rape’s transpiration rate presented a bimodal pattern.The stomatal conductance presented"S"pattern in all.The diurnal change of photosynthetic active radiation and temperature presented a signal pattern.The air humidity presented"S"pattern.By significantly relativity analysis,the photosynthetic active radiation was a main environmental factor which effected net photosynthetic rate in rape blooming period(R2=0.6916).The photosynthetic active radiation and temperature were main environmental factors which effected transpiration rate(RPAR2=0.7133,RT2=0.5611).The air humidity was a main environmental factor which affected the stomatal conductance(R2=0.5503).The rape not only external environment but also internal environment were all in suitable state in moist year,which rape’s photosynthetic physiology indexes were higher than in drought year.The different sowing rape ’ s transpiration rate showed very significantly different(P<0.001).The net photosynthetic rate and stomatal conductance showed significantly different(P<0.05).But the intercellular CO 2 concentration showed not significantly different. |
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| Keywords: | photosynthetic physiology characteristics rape blooming high altitude dry land |
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