植物生态学报 ›› 2019, Vol. 43 ›› Issue (11): 959-968.DOI: 10.17521/cjpe.2019.0180

• 研究论文 • 上一篇    下一篇

红外热成像监测云南松切梢小蠹虫害: 针叶尺度 观测

王景旭,黄华国(),林起楠,王冰,黄侃   

  1. 北京林业大学省部共建森林培育与保护教育部重点实验室, 北京 100083
  • 收稿日期:2019-07-15 接受日期:2019-10-29 出版日期:2019-11-20 发布日期:2020-03-26
  • 通讯作者: 黄华国
  • 基金资助:
    国家自然科学基金项目(41571332)

Shoot beetle damage to Pinus yunnanensis monitored by infrared thermal imaging at needle scale

WANG Jing-Xu,HUANG Hua-Guo(),LIN Qi-Nan,WANG Bing,HUANG Kan   

  1. Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China
  • Received:2019-07-15 Accepted:2019-10-29 Online:2019-11-20 Published:2020-03-26
  • Contact: HUANG Hua-Guo
  • Supported by:
    Supported by the National Natural Science Foundation of China(41571332)

摘要:

为寻求基于红外热成像技术监测云南松切梢小蠹(Tomicus yunnanensis)危害的可行性, 该研究以不同受害程度的云南松(Pinus yunnanesis)针叶为研究对象, 利用红外热成像仪观测受云南松切梢小蠹危害的云南松针叶温度的日变化规律, 并通过不同受害程度针叶的叶绿素含量、叶片含水量以及净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)等生理生化因子来分析解释针叶温度的变化。结果表明: (1)云南松针叶内叶绿素和水分含量随受害时间增加逐渐降低, 叶绿素含量下降速率比含水量下降速率快; (2)叶片的PnGsTr随受害程度增加而降低, 针叶温度与大气温度的温差(ΔTl-a)则随受害程度增加而变大; (3)不同程度受害针叶温度与健康针叶的温差(ΔT)在14:00-15:00之间达到最大, 轻度、中度和重度受害针叶ΔT分别可达0.6、0.7、2.5 ℃; (4)不同程度受害针叶的Gs、叶片含水量与ΔT呈较强的负相关关系。针叶受害后叶片内部水分失衡引起叶温变化, 利用红外热辐射对于温度变化的敏感性, 可通过红外热成像技术精确探测针叶温度的变化, 从而检测到云南松遭受云南松切梢小蠹危害的程度。

关键词: 红外热成像, 针叶温度, 气孔导度, 叶片含水量, 虫害监测

Abstract:

Aims To explore the feasibility of thermal infrared technology for monitoring the shoot beetle damage to Yunnan pine (Pinus yunnanensis), the relationship between temperature and biochemical and/or physiological factors of healthy and damaged shoots of Yunnan pine was analyzed.Methods The temperatures were extracted with the software FLIR-TOOLS from the thermal images of damaged shoots. The temperature differences between damaged shoots and healthy shoots (ΔT) in the same thermal image were analyzed. The relationships between ΔT and physiological and biochemical parameters were used to clarify the mechanism that caused needle temperature increase with infested duration.Important findings Results indicated: (1) The chlorophyll and water content of damaged shoots decreased with the infested duration, and the chlorophyll content decreased faster than water content; (2) The net photosynthetic rate (Pn), stomata conductance (Gs) and transpiration rate (Tr) also decreased with infested duration, and the temperature difference between needle and atmosphere (ΔTl-a) increased with infested duration; (3) ΔT reached the maximum at 14:00 to 15:00; the temperature differences of lightly-infested, mid-infested and heavily-infested needles reached 0.6, 0.7 and 2.5 °C, respectively; (4) A strong negative correlation was found between ΔT and Gs, water content. Our study concluded that the water imbalance of damaged needles caused needle temperature changes. Therefore, thermal infrared technology could be applied to monitor shoot beetle damage of Yunnan pine at different stages.

Key words: thermal infrared, needle temperature, stomata conductance, leaf water content, pest monitoring