相关实验视频

Updated: Sep 13, 2025

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

Published on: August 29, 2019

用于估计叶子生化特征的背腔内和角抗性光谱指数:从叶子扩展到植物树冠水平

Dongjie Ran¹, Zhongqiu Sun¹, Shan Lu¹

¹Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China.

The New phytologist

|July 31, 2025

概括

新的光谱指数 (DARSI) 准确地估计了叶子的生物化学特征,如叶绿素含量,克服了叶子不对称性和遥感视角的挑战. 这有助于改善叶子和树冠水平的植物监测.

科学领域:

植物生理学和遥感.
超光谱成像和光谱分析.

背景情况:

叶子生化特征的估计受阻于背腔腹部不对称性 (叶子侧向和叶子侧向之间的差异).
多角反射,受叶子的方向和照明的影响,进一步复杂化了遥感中准确的特征估计.

研究的目的:

开发和验证光谱指数,以减轻背腔腹部不对称性和多角效应,以准确估计叶子的生化特征.
改善在树冠层面上绘制叶子生化特征的空间映射.

主要方法:

分析多角反射特征的背腹叶. 叶子.
使用理论波长选择方法开发背腹和角抗性光谱指数 (DARSI).
用超光谱图像估计叶子Chl含量 (LCC) 和等效水厚的DARSI验证.

主要成果:

现有的光谱指数在视角和叶子侧面之间显示了显著的精度变化.
通过减轻不对称效应,DARSI在估计LCC和等效水厚方面表现出高准确度.
DARSI提供了更准确的LCC在树冠层面的空间分布映射.

结论:

在遥感中,DARSI是克服叶子不对称性和多角反射挑战的有效工具.
拟议的指数为准确的植物生化特征估计提供了实际解决方案.
DARSI 增强了在叶子和树冠尺度上对植物生理状态的监测.

关键词:

近距离的高光谱成像光谱学近距离的高光谱成像光谱学背部腹部叶子叶子叶子叶子的亚轴和亚轴侧面.叶子的生化特征叶子的生化特征多角度反射因子的反射因子频谱指数是指光谱指数.

更多相关视频

Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy

Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy

Published on: July 29, 2021

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses

Published on: August 9, 2019

相关概念视频

Light Acquisition

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.

Key Elements for Plant Nutrition

Key Elements for Plant Nutrition

Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...

Photoreceptors and Plant Responses to Light

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.