相关实验视频

Updated: Jul 12, 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

在半干旱的农业生态系统中,对不同叶角作物的RUSLE C因子基于地块的测量进行升级

Melis Özge Pınar¹, Günay Erpul²

¹Dept. of Soil & Water Res. Research, Transitional Zone Agricultural Research Inst. TAGEM (TR Ministry of Agriculture and Forestry), 26080, Eskisehir, Turkey. melisozge.pinar@tarimorman.gov.tr.

Environmental monitoring and assessment

|October 19, 2023

概括

这项研究开发了使用规范差异植被指数 (NDVI) 和叶面积指数 (LAI) 的简化模型,以估计向日和小麦作物的土壤损失率 (SLR). 这些模型为可持续的土地管理提供了传统现场测量的实际替代方案.

科学领域:

农业科学农业科学
环境科学环境科学
遥感遥感遥感遥感

背景情况:

评估时间覆盖变化对于水文和侵蚀过程管理至关重要.
叶片角分布 (LAD) 影响用于估计覆盖管理因子 (C-因子) 的植被指数 (VIs).
可持续的土地和土壤管理需要了解保护性树冠覆盖的变化.

研究的目的:

为了评估向日和小麦的C因子,不同的叶面取向.
开发使用NDVI和LAI估计作物阶段土壤损失比率 (SLR) 的缩小模型.
提供适用于半干旱作物系统的植物特异方程.

主要方法:

使用渐进线性回归与NDVI和LAI的减少模型.
通过远程和近距离传感工具测量NDVI.
使用近距离手持作物传感器获得LAI.
对特定作物生长阶段的上调SLR (向日1P,小麦3P).

主要成果:

开发了SLR的预测方程,R平方值为0.85的向日和0.93的小麦.
证明了NDVI和LAI在估计不同作物生长阶段的SLR中的实用性.
验证了简化模型对树冠覆盖评估的有效性.

结论:

开发的模型提供了一种有效的方法,用于估计半干旱作物系统中的SLR.
这些模型减少了对传统,劳动密集型现场测量的需求.
该方法通过准确评估覆盖管理因素来支持可持续的土地和土壤管理.

关键词:

覆盖管理因子 (RUSLE C因子)叶片面积指数 (LAI) 叶片面积指数 (LAI)叶片的角度分布 (LAD)规范差异植被指数 (NDVI) 是指标准差异植被指数.升级扩展是指升级规模.

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

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon

Published on: October 16, 2018

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.

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.

The Calvin Benson Cycle

The Calvin Benson Cycle

Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...