Inversion study of soil organic matter content based on reflectance spectroscopy and the improved hybrid extreme learning machine

Xiao, Dong; Huang, Jie; Li, Jian; Fu, Yanhua; Mao, Yachun; Li, Zhenni; Bao, Nisha

doi:10.1016/j.infrared.2022.104488

Cited by 9 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of nitrogen and phosphorus supplements on total soil nutrients is not pronounced, as short-term fertilization leads to robust vegetation growth, with most of the available nutrients being rapidly absorbed and utilized by the vegetation, rather than accumulating in the soil (Feng et al, 2018). Organic matter is an essential component of soil and plays a signi cant role in soil fertility, in uencing various physical, chemical, and ecological properties of soil (Xiao et al, 2023;. Some studies have shown that long-term application of fast-release nitrogen and phosphorus fertilizers does not signi cantly increase soil organic matter content and, in some cases, may decrease it (Zhang et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Responses of Soil and Vegetation Properties to Chemical Fertilization in Restoring Coal Gangue Hills in an Alpine Mining Area

Jin,

Li,

Sun

et al. 2024

Preprint

View full text Add to dashboard Cite

During the coal mining operation, the accumulated soil in coal gangue hills often suffers from nutrient deficiencies, which can be overcome using fertilizer supplementation. The supplementation of exogenous nutrients has proven to be an effective means of enhancing physicochemical conditions of these soils and promoting vegetation reestablishment. This study aimed to investigate the characteristics of plant growth and soil properties in vegetation restoration to a coal gangue hill, focusing on artificially seeded grasslands in a high-altitude mining area as the research subject. Over a period of three consecutive years, varying gradients of nitrogen and phosphorus supplements were applied to the coal gangue hill. Furthermore, the interrelationships between plants and soil factors at different dosages of chemical fertilization were analyzed so as to determine the appropriate fertilization level conducive to the ecological system's restoration in the area. The results of this study revealed significant responses (P < 0.05) in vegetation height, coverage, and biomass to nitrogen and phosphorus dosage, leading to a significant increase in the availability of soil nutrients (P < 0.05). Apart from moss coverage, fertilizer dosage exhibited a significant positive correlation (P < 0.05) with various vegetation characteristics, as well as a highly significant positive correlation (P < 0.05) with soil nutrient availability. Notably, no significant differences (P > 0.05) were observed in soil physical properties with varying nitrogen and phosphorus amendments. In conclusion, nitrogen and phosphorus supplementation is beneficial for promoting vegetation growth and improving soil chemical properties in high-altitude mining areas with coal gangue hills. The recommended minimum dosage is 40g/m² of urea in combination with 30g/m² of diammonium phosphate. This supplement should be applied continuously. Considering the capacity of the mining area's ecosystem to self-repair and the costs of ecological restoration, it is advisable to utilize organic fertilizers and sheep manure in the next phase of restoration.

show abstract

Section: Discussionmentioning

confidence: 99%

Responses of Soil and Vegetation Properties to Chemical Fertilization in Restoring Coal Gangue Hills in an Alpine Mining Area

Jin,

Li,

Sun

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The effect of nitrogen and phosphorus supplements on total soil nutrients is not pronounced, as short-term fertilization leads to robust vegetation growth, with most of the available nutrients being rapidly absorbed and utilized by the vegetation, rather than accumulating in the soil (Feng et al 2018). Organic matter is an essential component of soil and plays a significant role in soil fertility, influencing various physical, chemical, and ecological properties of soil (Xiao et al 2023;. Some studies have shown that long-term application of fast-release nitrogen and phosphorus fertilizers does not significantly increase soil organic matter content and, in some cases, may decrease it (Zhang et al 2009).…”

Section: Discussionmentioning

confidence: 99%

Responses of Soil and Vegetation Properties to Chemical Fertilization in Restoring Coal Gangue Hills in an Alpine Mining Area

Jin,

Li,

Sun

et al. 2023

Preprint

View full text Add to dashboard Cite

During the coal mining operation, the accumulated soil in coal gangue hills often suffers from nutrient deficiencies, which can be overcome using fertilizer supplementation. The supplementation of exogenous nutrients has proven to be an effective means of enhancing physicochemical conditions of these soils and promoting vegetation reestablishment. This study aimed to investigate the characteristics of plant growth and soil properties in vegetation restoration to a coal gangue hill, focusing on artificially seeded grasslands in a high-altitude mining area as the research subject. Over a period of three consecutive years, varying gradients of nitrogen and phosphorus supplements were applied to the coal gangue hill. Furthermore, the interrelationships between plants and soil factors at different dosages of chemical fertilization were analyzed so as to determine the appropriate fertilization level conducive to the ecological system's restoration in the area. The results of this study revealed significant responses (P < 0.05) in vegetation height, coverage, and biomass to nitrogen and phosphorus dosage, leading to a significant increase in the availability of soil nutrients (P < 0.05). Apart from moss coverage, fertilizer dosage exhibited a significant positive correlation (P< 0.05) with various vegetation characteristics, as well as a highly significant positive correlation (P < 0.05) with soil nutrient availability. Notably, no significant differences (P > 0.05) were observed in soil physical properties with varying nitrogen and phosphorus amendments. In conclusion, nitrogen and phosphorus supplementation is beneficial for promoting vegetation growth and improving soil chemical properties in high-altitude mining areas with coal gangue hills. The recommended minimum dosage is 40g/m² of urea in combination with 30g/m² of diammonium phosphate. This supplement should be applied continuously. Considering the capacity of the mining area's ecosystem to self-repair and the costs of ecological restoration, it is advisable to utilize organic fertilizers and sheep manure in the next phase of restoration.

show abstract

“…Spectral analysis technology, widely employed and developed across multiple fields, offers a noninvasive means to analyze coal properties. − Investigating the interactions between coal and various light wavelengths allows us to deduce its physical and chemical properties, enabling a more precise classification. Additionally, spectral information can facilitate the regression analysis of coal composition.…”

Section: Introductionmentioning

confidence: 99%

Coal Classification Based on Reflection Spectroscopy and the IAT-TELM Algorithm

Li,

Xiao,

Xie

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

As a principal energy globally, coal’s quality and variety critically influence the effectiveness of industrial processes. Different coal types cater to specific industrial requirements due to their unique attributes. Traditional methods for coal classification, typically relying on manual examination and chemical assays, lack efficiency and fail to offer consistent accuracy. Addressing these challenges, this work introduces an algorithm based on the reflectance spectrum of coal and machine learning. This method approach facilitates the rapid and accurate classification of coal types through the analysis of coal spectral data. First, the reflection spectra of three types of coal, namely, bituminous coal, anthracite, and lignite, were collected and preprocessed. Second, a model utilizing two hidden layer extreme learning machine (TELM) and affine transformation function is introduced, which is called affine transformation function TELM (AT-TELM). AT-TELM introduces an affine transformation function on the basis of TELM, so that the hidden layer output satisfies the maximum entropy principle and improves the recognition performance of the model. Third, we improve AT-TELM by optimizing the weight matrix and bias of AT-TELM to address the issue of highly skewed distribution caused by randomly assigned weights and biases. The method is named the improved affine transformation function (IAT-TELM). The experimental findings demonstrate that IAT-TELM achieves a remarkable coal classification accuracy of 97.8%, offering a cost-effective, rapid, and precise method for coal classification.

show abstract

Inversion study of soil organic matter content based on reflectance spectroscopy and the improved hybrid extreme learning machine

Cited by 9 publications

References 42 publications

Responses of Soil and Vegetation Properties to Chemical Fertilization in Restoring Coal Gangue Hills in an Alpine Mining Area

Responses of Soil and Vegetation Properties to Chemical Fertilization in Restoring Coal Gangue Hills in an Alpine Mining Area

Responses of Soil and Vegetation Properties to Chemical Fertilization in Restoring Coal Gangue Hills in an Alpine Mining Area

Coal Classification Based on Reflection Spectroscopy and the IAT-TELM Algorithm

Contact Info

Product

Resources

About