Publicado

2020-04-01

Short-term grazing and its impacts on soil and pasture degradation

Pastoreo a corto plazo y sus impactos en la degradación del suelo y los pastos

Palabras clave:

animal trampling, dairy cattle, soil physics, vegetation indices, remote sensing (en)
pisoteo animal, ganado lechero, física del suelo, índices de vegetación, teledetección (es)

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The objective was to verify possible modifications of the soil structure and the pattern of the spectral response of pasture vegetation cover to animal trampling. The study was carried out on a farm in the Agreste region of Pernambuco, Brazil in an area with continuous grazing by heifers. Soil samples were collected at 36 regular points, before and after the grazing period, where the physical properties of the soil were determined at a 0.00—0.10 m depth. Before and after grazing, images of the Sentinel-2A satellite were also obtained to observe the pasture vegetation response pattern over time through Vegetation Indexes. The soil attribute data were submitted to multivariate factorial analysis. The vegetation index maps were evaluated for spatial variability. The results showed that after the grazing, there was a significant change in soil attributes and pasture, which can indicate possible degradation processes.

El objetivo fue verificar las posibles modificaciones de la estructura del suelo y el patrón de la respuesta espectral de la cubierta vegetal de los pastizales en función del pisoteo de los animales. El estudio se llevó a cabo en una granja en la región Agreste de Pernambuco, Brasil.
En un área manejada bajo pastoreo continuo de vaquillas. Se recolectaron muestras de suelo en 36 puntos regulares, antes y después del período de pastoreo, donde se determinaron las propiedades físicas del suelo en la profundidad de 0.00-0.10 m. Antes y después del pastoreo, también se obtuvieron imágenes del satélite Sentinel-2A para observar el patrón de respuesta de la vegetación del pasto a lo largo del tiempo a través de los Índices de Vegetación. Los datos de los atributos del suelo se sometieron a análisis factorial multivariado. Los mapas del índice de vegetación se evaluaron para determinar la variabilidad espacial. Los resultados mostraron que después del pastoreo,
hubo un cambio significativo en los atributos del suelo y el pasto, que puede indicar posibles procesos de degradación.

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