使用作物拦截的太阳辐射和植被指数来估计Choy Sum的干物质产量
Yiyin He1,2, Zhao Wang1,2, Sashuang Sun1,2
1College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China.
Frontiers in plant science
|October 4, 2023
概括
准确的蔬菜干物质估计是至关重要的. 累积拦截的光合作用活性辐射 (Aipar) 模型的表现优于光谱植被指数,显示了精确产量评估和理解的潜力.
科学领域:
- 农业科学 农业科学
- 遥感 遥感 遥感 遥感
- 植物生理学 植物生理学
背景情况:
- 准确的蔬菜产量估计对于农业管理至关重要.
- 传统的遥感方法通常依赖于实证植被指数.
- 机械方法为更准确的收益率预测提供了潜力.
研究的目的:
- 以基于因果导向的拦截辐射模型和基于光谱反射率的模型来估计Choy Sum干物质.
- 为了比较这两种建模方法的性能.
- 为了评估 (N) 率对Choy Sum辐射使用效率 (RUE) 的影响.
主要方法:
- 进行了为期2年的实地实验,使用不同的N速率 (0-200公斤/公).
- 测量了树冠光谱,光合作用活性辐射和不同生长阶段的树冠覆盖面积.
- 开发并比较基于Aipar和基于光谱反射率的干物质估计模型.
主要成果:
- 干物与植被指数 (NDVI,NDRE,RERVI,RVI) 相关的指数模型显示R2<0.80.
- 累积拦截的光合作用活性辐射 (Aipar) 显示出与干物质有显著的线性相关性 (R2 = 0.82,RMSE = 9.4).
- 率显著影响了RUE,在100-200公斤N/ha时观察到最佳值.
结论:
- 与基于光谱的模型相比,基于Aipar的模型提供了更准确的Choy Sum干物质估计.
- 该研究强调了Aipar在精确估计蔬菜产量方面的潜力.
- 的应用速度显著影响了Choy Sum的干物积累和RUE.
相关概念视频
Light Acquisition
8.5K
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.
8.5K
Estimation of the Physical Quantities
4.3K
On many occasions, physicists, other scientists, and engineers need to make estimates of a particular quantity. These are sometimes referred to as guesstimates, order-of-magnitude approximations, back-of-the-envelope calculations, or Fermi calculations. The physicist Enrico Fermi was famous for his ability to estimate various kinds of data with surprising precision. Estimating does not mean guessing a number or a formula at random. Instead, estimation means using prior experience and sound...
4.3K
Precipitation Titration Curve: Analysis
1.1K
The precipitation titration curve demonstrates the change in concentration of one reactant with the volume of titrant added. During the titration of chloride ions with silver nitrate, the precipitation titration curve is divided into three regions: before, at, and after the equivalence point. Before the equivalence point, low redissolution of the sparingly soluble silver chloride precipitate gives a low silver ion concentration. However, in the second region, representing the equivalence point,...
1.1K
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
411
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
The ATR process begins by directing a beam...
411


