Impacts of fresh and aged holm-oak biochar on clomazone behaviour in rice cropping soils after transition to sprinkler irrigation

• DOI: 10.1016/j.geoderma.2022.115768
• Publication Date: 2022-02-14T22:37:09Z
• Authors: Antonio López-Piñ...; Jaime Sánchez-Terrón; Carmen Martín-Franco; David Peña; Luis Andrés Vicente; Soraya Gómez; Damián Fernández-...; Ángel Albarrán
• Keywords: Clomazone; Paddy field

Although alternative practices to traditional flooding rice cultivation urgently need be implemented in water-stressed regions, these can modify soil properties, thereby affecting the environmental behaviour of pesticides. One most extensively used herbicides cropping is clomazone. A field experiment covering two years was conducted evaluate how fresh and aged holm oak biochar (BH) influenced clomazone's after transition from sprinkler irrigation with different tillage systems. The involved either without (FT) or (FTBH) first-year BH addition, four treatments more where had been use for 3 – (ST) (STBH) no-tillage (SNT) (SNTBH) addition. measurements done first second application were taken constitute temporal variability (i.e., "fresh" "aged" effects, respectively). Adsorption-desorption, dissipation, leaching studies carried out under laboratory conditions using soils experiment. Kd (partition coefficient) values 1.2, 1.1, 1.1 1.5, 1.2 times greater SNTBH, STBH, FTBH than corresponding unamended years, respectively. clomazone persistence only significantly affected by addition irrigation. Under anaerobic incubation led an increase t½ (half-live) 19 26 d 22 21 SNT ST, 36 35 d, 25 31 amended However, aerobic conditions, while year increased 37 41 ST 40 52 soils, not affected. management regimes leaching, total leached showing following trend: = > FT STBH SNTBH FTBH. Therefore, as organic amendment may effective tool greatly reduce water contamination fields conventional irrigation, but also particularly aging practices.