Carbon geomicrobiology, saturation deficit and sequestration potential of Brazilian agricultural soils DOI Creative Commons
Heidy Soledad Rodríguez Albarracín

Published: March 26, 2024

Carbon geomicrobiology, saturation deficit and sequestration potential of Brazilian agricultural soilsThe ecosystem service climate regulation provided by soil is due to its capacity sequester C, organic carbon (SOC) essential for health.The the retain OC depends on minerals their interaction with microbiota.Chapter 1 this work analyzes COS in clay fraction soils Piracicaba region, state São Paulo, based an equation C fine particles, adjusted tropical soils.This was using a spatial regression model.In surface layer, mainly explained relative abundance kaolinite, hematite, goethite gibbsite determined Vis-NIR-SWIR spectroscopy.A direct relationship observed gibbsite.At depth 80 100 cm, kaolinite hematite were responsible greatest variation potential.The contribution each mineral also mapped, high contributions from deep layers.Chapter 2 adjustment model microbiological mineralogical variables.The modeling mapping different properties carried out spectral transfer functions digital (DSM), achieving R 0.77 0.85.All these detected specific bands, which achieved correlations 0.64 0.98 laboratory analyses.The autoregressive models obtained r 0.61 0.7.The explanatory variables associated goethite, fungi, actinomycetes, vesicular-arbuscular mycorrhizal enzymatic activity betaglucosidase, urease phosphatase particulate matter (POM), overall fungi being most important variable.Chapter 3 development strategy analyze at microscale through spectroscopic detection 35 samples analysis microbial biomass (MBC) beta-glucosidase, phosphatase, fractionation (SOM) into POM SOM (MAOM).In order characterize Mid-IR spectra fractions according variables, bands selected variable.Finally, chapter 4, technique developed calculate spatialize indices enzymes betaglycosidase, areas Brazil DSM having as covariates Synthetic Soil Image (SYSI), relief, climate, biomes maps.The enzyme maps area (3481362.60km²), validation ranging 0.68 0.35.These 30 m scale can be considered monitoring quality health soils, they are sensitive land use management.

Language: Английский

Multi-modal fusion deep learning model for excavated soil heterogeneous data with efficient classification DOI
Qimeng Guo, Liangtong Zhan, Zhen‐Yu Yin

et al.

Computers and Geotechnics, Journal Year: 2024, Volume and Issue: 175, P. 106697 - 106697

Published: Sept. 2, 2024

Language: Английский

Citations

1
Ruzigrass as cover crop improves the potassium partial balance and use by subsequent cotton DOI
Fábio Rafael Echer, M. R. Volf,

Vinícius José Souza Peres

et al.

Nutrient Cycling in Agroecosystems, Journal Year: 2023, Volume and Issue: 127(3), P. 347 - 358

Published: Sept. 14, 2023

Language: Английский

Citations

1
Sand subfractions by proximal and satellite sensing: Optimizing agricultural expansion in tropical sandy soils DOI Open Access
Luis Augusto Di Loreto Di Raimo, Eduardo Guimarães Couto, Raúl Roberto Poppiel

et al.

CATENA, Journal Year: 2023, Volume and Issue: 234, P. 107604 - 107604

Published: Nov. 1, 2023

Language: Английский

Citations

1
Establishing environmental soil phosphorus thresholds to mitigate its transfer to water bodies in Mato Grosso State, Brazil DOI Creative Commons
Walquíria Chaves da Silva, Paulo Cézar Cassol, Rodrigo da Silveira Nicoloso

et al.

Revista Brasileira de Ciência do Solo, Journal Year: 2023, Volume and Issue: 47

Published: Jan. 1, 2023

ABSTRACT Excessive phosphorus (P) applications can increase nutrient levels in the soil, facilitating its transference to aquatic environments and causing contamination. Thus, environmental P threshold (P-threshold) is a tool establish sound level of which values below are harmless environment. This study aimed P-threshold equation for soils Mato Grosso State, Brazil. Twenty samples representative from main swine production regions State were collected. These characterized chemically terms adsorption capacity, then incubated with rates 30 days. After incubation, water-soluble content (P-water) available determined by Mehlich-1 method (P-Mehlich-1). The relationship between P-water P-Mehlich-1 allowed determination amount water increases abruptly, establishing this point as limit (P-limit). Subsequently, P-limit plotted against clay soils, resulting was used calculate adding safety margin 20 % versus equation. model tested on 120 soil it able separate them into two groups low high P-water, classified or above P-threshold, respectively. Based that, simplified “P-threshold (mg dm -3 ) = 13 + 0.5 * clay” proposed.

Language: Английский

Citations

1
Carbon geomicrobiology, saturation deficit and sequestration potential of Brazilian agricultural soils DOI Creative Commons
Heidy Soledad Rodríguez Albarracín

Published: March 26, 2024

Carbon geomicrobiology, saturation deficit and sequestration potential of Brazilian agricultural soilsThe ecosystem service climate regulation provided by soil is due to its capacity sequester C, organic carbon (SOC) essential for health.The the retain OC depends on minerals their interaction with microbiota.Chapter 1 this work analyzes COS in clay fraction soils Piracicaba region, state São Paulo, based an equation C fine particles, adjusted tropical soils.This was using a spatial regression model.In surface layer, mainly explained relative abundance kaolinite, hematite, goethite gibbsite determined Vis-NIR-SWIR spectroscopy.A direct relationship observed gibbsite.At depth 80 100 cm, kaolinite hematite were responsible greatest variation potential.The contribution each mineral also mapped, high contributions from deep layers.Chapter 2 adjustment model microbiological mineralogical variables.The modeling mapping different properties carried out spectral transfer functions digital (DSM), achieving R 0.77 0.85.All these detected specific bands, which achieved correlations 0.64 0.98 laboratory analyses.The autoregressive models obtained r 0.61 0.7.The explanatory variables associated goethite, fungi, actinomycetes, vesicular-arbuscular mycorrhizal enzymatic activity betaglucosidase, urease phosphatase particulate matter (POM), overall fungi being most important variable.Chapter 3 development strategy analyze at microscale through spectroscopic detection 35 samples analysis microbial biomass (MBC) beta-glucosidase, phosphatase, fractionation (SOM) into POM SOM (MAOM).In order characterize Mid-IR spectra fractions according variables, bands selected variable.Finally, chapter 4, technique developed calculate spatialize indices enzymes betaglycosidase, areas Brazil DSM having as covariates Synthetic Soil Image (SYSI), relief, climate, biomes maps.The enzyme maps area (3481362.60km²), validation ranging 0.68 0.35.These 30 m scale can be considered monitoring quality health soils, they are sensitive land use management.

Language: Английский

Citations

0