Fecha/hora: 11/06/2024 01:11:05

Biblioteca(s): | INIA Treinta y Tres.
Fecha corriente: | 04/03/2022
Fecha de la última actualización: | 04/03/2022
Autoria: | CAMPOS, F.; ROEL, A.; CARRACELAS, G.; VERGER, M.; HUERTAS, R.; PERDOMO, C.
Afiliación: | FEDERICO CAMPOS BELTRAMI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ALVARO ROEL DELLAZOPPA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JULIO GONZALO CARRACELAS GARRIDO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; M. VERGER, Laboratorio Tecnológico  del Uruguay (LATU), Montevideo, Uruguay.; R. HUERTAS, Laboratorio Tecnológico  del Uruguay (LATU), Montevideo, Uruguay.; C. PERDOMO, Facultad de Agronomía, Universidad de La República, Montevideo, Uruguay .
Título: | Irrigation and phosphorous fertilization management to minimize rice grain arsenic content.
Año de publicación: | 2022
Fuente/Imprenta: | Chemosphere, February 2022, 296, art.134085. doi: https://doi.org/10.1016/j.chemosphere.2022.134085
Páginas: | 12 p.
DOI: | 10.1016/j.chemosphere.2022.134085
Idioma: | Inglés

Notas:

Article history: Received 6 December 2021; Received in revised form 17 February 2022; Accepted 20 February 2022, Available online 22 February 2022.
e-mail address, fefocampos2003@hotmail.com (F. Campos).

Contenido:

This research sought to minimize inorganic arsenic levels in polished rice grain by using different irrigation and phosphorous fertilization practices while also maintaining crop yield and water productivity. Two experiments were conducted during seasons 2018?2019 and 2019?2020 using a split-plot design with three blocks, five irrigation treatments (main-plots) and two phosphorous levels (sub-plots). Irrigation treatments consisted of a traditional continuous flood (CF) control and four alternatives irrigation techniques with one or two drying
events during the irrigation cycle. The phosphorous fertilization levels investigated were an unfertilized control (0 kg P2O5 ha&#8722; 1 ) and the recommended fertilization level of 50 kg P2O5 ha&#8722; 1 . Soil pH and redox potentials were measured in each treatment. Strategically-timed, low severity drying events were effective at achieving aerobic soil conditions, resulting in Eh values over 50 mV. The alternative irrigation treatment with two drying events, implemented at panicle initiation and full flowering, was the most effective in reducing inorganic arsenic in grain without affecting grain yield or the amount of irrigation water applied. This irrigation technique could be considered as an alternative management to the traditional continuous flooded to reach minimal inorganic arsenic accumulation in grain in order to attend special quality standards or specific market requirements. Accumulated inorganic arsenic in grain was below international maximum levels in all analyzed samples, with an average value of 0.084 mg kg&#8722; 1
.

Palabras-Clave: | INORGANIC ARSENIC; IRRIGATION; REDOX POTENTIAL; RICE; URUGUAY.
Categoría del tema: | F06 Riego
Registro original: | INIA Treinta y Tres (TT)
Ejemplares: | TT - (103488-1) - PXI - AP - DD - PP/CHEMOSPHERE/2022/CAMPOS -  -  - DIS