用三波段农用数码相机评价土壤特性

IF 1 Q3 GEOGRAPHY
Agnieszka Glinko, Cezary Kaźmierowski, J. Piekarczyk, Sławomir Królewicz
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引用次数: 0

摘要

基于土壤光谱特征的遥感技术是未来土地管理的关键;然而,他们仍然需要实地测量和农化实验室来校准土壤性质模型。可见和近红外漫反射光谱已被证明是一种快速有效的方法。本研究旨在评估农业数码相机采集的多光谱数据在确定土壤性质方面的适用性。这款3.2 mpx的相机可以拍摄三种光谱波段的图像——绿色、红色和近红外。首先,收集了151个样品的参考数据,随后在实验室进行了检查,以确定颗粒组成并量化一些化学元素。其次,测量了土壤的其他性质,如阳离子交换量、有机碳和土壤pH。最后,对每个土壤样品进行农用数码相机拍摄。利用三个可用光谱波段的反射率值计算光谱指数。使用R Studio中的Cubist等独立验证回归模型和偏最小二乘等交叉验证模型计算所收集数据之间的关系。此外,还使用了不同类型的数据归一化(乘法散点校正、标准正态变量、最小-最大归一化、转换为吸光度)。结果表明,农用数码相机适用于砂土、粉土、pH、K、Cu、Pb、Mn、F、阳离子交换量和有机碳含量的土壤性质评价。土壤有机碳的决定系数为0.563 ~ 0.986。用立体回归模型比用偏最小二乘法得到更高的值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of Soil Characteristics Using a Three-Band Agricultural Digital Camera
Abstract Remote sensing techniques based on soil spectral characteristics are the key to future land management; however, they still require field measurement and an agrochemical laboratory for the calibration of the soil property model. Visible and near-infrared diffuse reflectance spectroscopy has proven to be a rapid and effective method. This study aimed to assess the suitability of multispectral data acquired with the agricultural digital camera in determining soil properties. This 3.2-Mpx camera captures images in three spectral bands – green, red and near-infrared. First, the reference data were collected, which consist of 151 samples that were later examined in the laboratory to specify the granulometric composition and to quantify some chemical elements. Second, additional soil properties such as cation exchange capacity, organic carbon and soil pH were measured. Finally, the agricultural digital camera photograph was taken for every soil sample. Reflectance values in three available spectra bands were used to calculate the spectra indices. The relationships between the collected data were calculated using the independent validation regression model such as Cubist and cross-validation model like partial least square in R Studio. Additionally, different types of data normalisation multiplicative scatter correction, standard normal variate, min–max normalisation, conversion into absorbance] were used. The results proved that the agricultural digital camera is suitable for soil property assessment of sand and silt, pH, K, Cu, Pb, Mn, F, cation exchange capacity and organic carbon content. Coefficient of determination varied from 0.563 (for K) to 0.986 (for soil organic carbon). Higher values were obtained with the Cubist regression model than with partial least squares.
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来源期刊
CiteScore
2.00
自引率
10.00%
发文量
0
审稿时长
12 weeks
期刊介绍: Quaestiones Geographicae was established in 1974 as an annual journal of the Institute of Geography, Adam Mickiewicz University, Poznań, Poland. Its founder and first editor was Professor Stefan Kozarski. Initially the scope of the journal covered issues in both physical and socio-economic geography; since 1982, exclusively physical geography. In 2006 there appeared the idea of a return to the original conception of the journal, although in a somewhat modified organisational form. Quaestiones Geographicae publishes research results of wide interest in the following fields: •physical geography, •economic and human geography, •spatial management and planning,
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