Título:	Soil carbon sequestration in agricultural areas: evaluation of C content and features of soil organic matter by laser photonic techniques.
Autor:	BENTO, L. R. OLIVEIRA, P. P. A. PEZZOPANE, J. R. M. BERNARDI, A. C. de C. MAGALHÃES, A. MILORI, D. M. B. P. MARTIN NETO, L.
Afiliación:	LUCAS R. BENTO, USP; PATRICIA PERONDI ANCHAO OLIVEIRA, CPPSE; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE; AIDA MAGALHÃES, AGROROBÓTICA; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA; LADISLAU MARTIN NETO, CNPDIA.
Año:	2022
Referencia:	In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE QUÍMICA, 45., 2022, Maceió. Química para o Desenvolvimento Sustentável e Soberano. Livro de resumos. Maceió, AL: Aptor Software, 2022.
Páginas:	p. 71.
Descripción:	Low-C-emission agricumire is essential for its sustainable growth, which aims at higher production with a low or zero C emission balance. Soll plays an important role in agricultural productivity, in which it has the pollential to accumulate C. The accumulated C can be transformed into C credits and is also profitable for the farmers in addition to the C quanlification, the evaluation of its chemical composition (quality) is essential to predict the resilence and lifetime in the soil. Laser-based photonic techniques are fast alternatives and less expensive than traditional ones: The technique principle is the excitation of elements or molecules, followed by the detection of the photons emitted using a spectrometer. The study aimed to quantily soil C and evaluate its qually using Laser-induced breakdown spectroscopy (LIBS) and Laser- Induced fluorescence spectroscopy (LIFS), respectively, in experimental agricultural areas, onder well managed pastures and integrated livestock-forest systoms, compared to conventional pasture (DP) and an ares of nalive vegetation (FO), located al Embrapa Резили Sudeste, São Carlos-SP, Brazil Soil C quantified using LIBS with a Q-switched ND YAG laser, emitting at 1064 nm, with pulse energy of 40 ml and 10 Hz, whose the emission line at 247.0 nm was used for C quantificaton, The soil C quantified by LIBS wan correlated with a reference technique (Elemental analyzer, model 2400 PerkinElmer USA) Soil organic matter (SOM) quality was evaluated by LIFS, whose the spectra were acquired directly on whole noil pellets with an excitation at 405 nm and emission 465-800 nm The spectral area was normaltired by content, obtaining an aromaticity index (H). To evaluate a possible correlation between Hoe with the wromaticity of SOM by "C NMR, SOM extractions were carried out from whole sod samples in the arese with the highest C stock by solubility method, obtaining three humic fractions: fulvic acids (AF), humic acles (HA) and humin (HUM]: All fractions were analyzed by PC CP/MAS NMR. The rainted pasture with a moderate stocking rale (RMS) increased the soil C stock (162.25 Mg Cha in relation to DP (10254 Mg Chur reaching levels statistically equal to the native vegetation (148. 32 Mg Cha LIBS showed a correlation of 0.80 with the reference technique, demorabang lemicity to soil C quantification. The index of intact soil samples had a comelation of 0.83 with aromaticity degree of HUM fraction, detected by "CNMR suggesting that SOM aromaticity is mainly rotated to HUM content. Pasture management showed the ability Во эпосунаме кой C stock, shose SOM from RMS comprised menly sliphic moeliselt pashume with fertilization, low animal stocking rate, and animal rotation seem to increase the introduction of Pesh organic matter, leading to sol carbon sequestration, helping to achiere low-C-ersion agriculture
NAL Thesaurus:	Soil organic matter Humin
Palabras clave:	Soil carbon stock LIBS LIFS
ISBN:	978-85-63273-46-8
Tipo de Material:	Resumo em anais e proceedings
Acceso:	openAccess
Aparece en las colecciones:	Resumo em anais de congresso (CNPDIA)