title: Dissipation and effects of tricyclazole on soil microbial communities and rice growth as affected by amendment with alperujo compost.
abstract: The presence of pesticides in surface and groundwater has grown considerably in the last decades as a consequence of the intensive farming activity. Several studies have shown the benefits of using organic amendments to prevent losses of pesticides from runoff or leaching. A particular soil from the Guadalquivir valley was placed in open air ponds and amended at 1 or 2% (w/w) with alperujo compost (AC), a byproduct from the olive oil industry. Tricyclazole dissipation, rice growth and microbial diversity were monitored along an entire rice growing season. An increase in the net photosynthetic rate of Oryza sativa plants grown in the ponds with AC was observed. These plants produced between 1100 and 1300kgha(-1) more rice than plants from the unamended ponds. No significant differences were observed in tricyclazole dissipation, monitored for a month in soil, surface and drainage water, between the amended and unamended ponds. The structure and diversity of bacteria and fungi communities were also studied by the use of the polymerase chain reaction denaturing gel electrophoresis (PCR-DGGE) from DNA extracted directly from soil samples. The banding pattern was similar for all treatments, although the density of bands varied throughout the time. Apparently, tricyclazole did not affect the structure and diversity of bacteria and fungi communities, and this was attributed to its low bioavailability. Rice cultivation under paddy field conditions may be more efficient under the effects of this compost, due to its positive effects on soil properties, rice yield, and soil microbial diversity.
authors: Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), P.O. Box 1052, 41080 Seville, Spain.
authors: M
authors: M
authors: García-Jaramillo
authors: Departamento de Fisiología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, P.O. Box 1095, 41080 Seville, Spain.
authors: S
authors: S
authors: Redondo-Gómez
authors: Departamento de Fisiología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, P.O. Box 1095, 41080 Seville, Spain.
authors: J M
authors: JM
authors: Barcia-Piedras
authors: Centro de Investigación y Formación Agraria (CIFA), Las Torres-Tomejíl, Ctra. Sevilla-Rinconada, Km 12, 41200 Alcalá del Río, Seville, Spain.
authors: M
authors: M
authors: Aguilar
authors: Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), P.O. Box 1052, 41080 Seville, Spain.
authors: V
authors: V
authors: Jurado
authors: Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), P.O. Box 1052, 41080 Seville, Spain.
authors: M C
authors: MC
authors: Hermosín
authors: Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS-CSIC), P.O. Box 1052, 41080 Seville, Spain. Electronic address: lcox@irnase.csic.es.
authors: L
authors: L
authors: Cox
mesh_terms: D000383:Agriculture; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005658:Fungi; D012275:Oryza; D010575:Pesticides / Q000032:analysis* / Q000633:toxicity; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis* / Q000633:toxicity; D013844:Thiazoles / Q000032:analysis* / Q000633:toxicity; D014866:Waste Products
chemical_list: D010575:Pesticides; D012987:Soil; D012989:Soil Pollutants; D013844:Thiazoles; D014866:Waste Products; C041191:tricyclazole
keywords: Chlorophyll fluorescence; DGGE; Organic amendment; Rice; Tricyclazole monitoring; Yield rate