| 程麒,黄春燕,王登伟,肖莉娟.基于红外热图像的棉花花铃期CWSI与光合参数关系的研究[J].干旱地区农业研究,2012,30(5):88~93 |
| 基于红外热图像的棉花花铃期CWSI与光合参数关系的研究 |
| Research on relationship of CWSI and photosynthetic parametersduring flowering and boll-forming stage of cotton based on infrared thermograph |
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| DOI：10.7606/j.issn.1000-7601.2012.05.17 |
| 中文关键词: 棉花 CWSI 光合参数 相关关系 |
| 英文关键词:Cotton CWSI Pn Gs Tr Correlation |
| 基金项目:国家自然科学基金项目（30960185）；人力资源和劳动社会保障部留学回国人员科技活动项目(2009XL003)；石河子大学高层次人才启动项目（RCZX200813） |
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| 中文摘要: |
| 在新疆生态气候条件下，采用膜下滴灌植棉技术，利用Fluke红外热像仪获取新陆早13号和新陆早33号两棉花品种在1 050 m3/hm2，2 100 m3/hm2，4 200 m3/hm2，5 300 m3/hm2 4水平水分处理条件下花铃期冠层红外热图像；应用图像处理技术，提取棉花冠层受光叶片温度，将人工参考湿表面（WARS）的温度运用到Jones（1992）定义的水分胁迫指数（CWSI）的经验公式中，计算CWSI；同时，用LI-6400便携式光合仪测得相应叶片净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)，研
究花铃期棉花冠层不同程度水分CWSI与Pn、Gs和Tr的相关性。结果表明，水分胁迫下随Pn、Gs和Tr的降低，CWSI升高，CWSI的临界值应在0.37～0.40。水分胁迫与非水分胁迫间，棉花冠层CWSI存在显著性的差异（α=0.05），水分胁迫下CWSI值较高；花铃期CWSI分别与Pn、Gs和Tr显著负相关（RCWSI-Pn=-0.8533**,RCWSI-Gs=-0.7771**,RCWSI-Tr=-0.8063**），花铃期CWSI与Pn、Gs和Tr可同步反映棉花冠层的水分状况。 |
| 英文摘要: |
| Using Fluke infrared thermal camera the canopy infrared thermal images at flowering and boll-forming stage of cotton under film drip irrigation experiment of 2 cotton cultivars with 4 levels water treatments in North of Xinjiang was obtained. Based on the image processing technology the temperature of canopy sunlit leaves was acquired. For calculation of CWSI the wet artificial reference surface (WARS) temperature was used in empirical formulation defined by Jones (1992). Using LI-6400 portable photosynthesis system the data of the corresponding net Photosynthetic Rate (Pn), Stomatal Conductance (Gs) and Transpiration Rate (Tr) were obtained for studying the correlation between CWSI and Pn, Gs and Tr in different level water treatments during flowering and boll-forming stage of cotton canopy. The result showed that under water stress CWSI increased with Pn, Gs and Tr reduction. CWSI threshold should be 0.37 to 0.40. CWSI was significantly difference (α=0.05) in water-stressed treatment and non water-stressed treatment. CWSI was higher i
n water-stressed treatment. The relationship between CWSI and Pn, Gs and Tr was significantly negative correlated (RCWSI-Pn=-0.8533**, RCWSI-Gs=-0.7771**, RCWSI-Tr=-0.8063**). CWSI as well Pn, Gs and Tr can synchronously reflect drought stress of cotton canopy. |
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