Boletín de la Sociedad Geológica Mexicana Volumen 75, núm. 2, A280323, 2023 http://dx.doi.org/10.18268/BSGM2023v75n2a280323

El magnetismo y el color como indicadores de cambios en el suelo por quema agrícola

Magnetism and color as indicators of changes in soil by stubble burning

Lizeth Iniesta-Martínez¹, Rafael García-Ruiz², Rufo Sánchez³, Avto Goguitchaichvili², Francisco Bautista^1,*

¹ Laboratorio Universitario de Geofísica Ambiental, Centro de Investigaciones en Geografía Ambiental, Universidad Nacional Autónoma de México, Michoacán, México.

² Laboratorio Universitario de Geofísica Ambiental, Instituto de Geofísica, Universidad Nacional Autónoma de México, Michoacán, México.

³ División Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Tabasco, México.

* Autor para correspondencia:(F. Bautista) This email address is being protected from spambots. You need JavaScript enabled to view it.

Cómo citar este artículo:

Iniesta-Martínez, L., García-Ruiz, R., Sánchez, R., Goguitchaichvili, A., Bautista, F., 2023, El magnetismo y el color como indicadores de cambios en el suelo por quema agrícola: Boletín de la Sociedad Geológica Mexicana, 75 (2), A280323. http://dx.doi.org/10.18268/BSGM2023v75n2a280323

Manuscrito recibido: 17 de Mayo de 2022; Manuscrito corregido: 4 de Febrero de 2023; Manuscrito aceptado: 27 de Marzo de 2023.

ABSTRACT

Agricultural burning is a common practice in sugarcane plantations in Mexico that exerts positive and negative effects on the soil. However, there is no consensus on the soil changes caused by the burning, thus highlighting the need to study this phenomenon through low-cost and quick-to-analyze indicators. Magnetic and color techniques can be indirect, fast, and cheap methods that can help to understand the chemical changes that agricultural burning causes to soils. We aim to evaluate the color and magnetic susceptibility of the soil as indicators of changes caused by agricultural burning. The study was carried out on a Vertisol grown with sugarcane in Tabasco, Mexico. Soil samples were taken at ten sites within the plot, at each site soil samples were collected every two centimeters up to 20 cm of soil depth, before and after agricultural burning. In total, 200 soil samples were analyzed. Temperatures were recorded during agricultural burning at 0, 2, and 5 cm depths. The parameters and color indices were analyzed in the CIE-L*a*b* system in the soil samples, and the high and low-frequency magnetic susceptibility were measured with Bartington MS2 equipment. After agricultural burning, the soils showed increased dark tones at four centimeters depth. Also, magnetic parameters showed changes in soil for the 4 cm in depth after the agricultural burning. The results show that color and magnetic susceptibility are efficient soil properties for identifying soil modifications caused by agricultural burning. In this case study, the effect of agricultural burning on sugarcane crops was short-term and shallow in the soil.

Keywords: Magnetic Susceptibility, CIE-L*a*b*, RGB, Redness Index,Vertisol.