Use of raw and composted poultry litter in lettuce produced under field conditions: microbiological quality and safety assessment
| Autor: | C.A. Bouzo, M.D. Pizarro, Lucas D. Daurelio, Fernando F. Muñoz, L.S. Frizzo, Gabriel Céccoli |
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| Rok vydání: | 2019 |
| Předmět: |
Argentina
Food Contamination Lactuca engineering.material Microbial contamination Husk Food safety Toxicology 03 medical and health sciences chemistry.chemical_compound Enterobacteriaceae Nitrate Risk Factors Animals Fertilizers Poultry litter 030304 developmental biology Nitrate levels 0303 health sciences Nitrates biology Compost Composting 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine Lettuce Contamination biology.organism_classification 040201 dairy & animal science Manure Crop Production chemistry Lettuce (Lactuca sativa L.) purl.org/becyt/ford/4.1 [https] engineering Environmental science Animal Science and Zoology Chicken manure Chickens purl.org/becyt/ford/4 [https] |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 0032-5791 |
| DOI: | 10.3382/ps/pez005 |
| Popis: | Lettuce (Lactuca sativa L.) constitutes one the most important vegetable crops worldwide. Poultry litter is being applied as an economically suitable alternative to nitrogen fertilizers in lettuce cultivation. However, little is known about the effects of this practice over this fresh product safety that is usually consumed as a salad. The aim of this work was to determine the microbiological quality and the nitrate content in lettuce produced, under field conditions, using either raw or composted poultry litter, coming from the same original batch. Two experiments were conducted in the experimental field of Facultad de Ciencias Agrarias (UNL, Santa Fe, Argentina) to assess the effects of recently extracted poultry litter that consisted of broiler chicken manure plus rice husk, or composted for 12 mo. The application amounts were: 20 T ha−1 (T1); 40 T ha−1 (T2); and no application of manure (T). Increasing the applied quantities had also increased the health risk associated with lettuce consumption, due to higher nitrate levels and microbial contamination. However, these risks were reduced by composting the material. Even when lettuce contamination with faecal bacteria was mainly due to the use of poultry litter, the number and incidence of pathogens were reduced when properly composted manure was applied instead of raw one. Increasing the dose of poultry litter applied also increases the health risk in lettuce. Though, when the material is properly composted, its fertilizing capacity is maintained, giving proper yields with lower nitrate levels and microbial contamination by enterobacteria. Fil: Pizarro, María Dolores. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina Fil: Céccoli, Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina Fil: Muñoz, Fernando Felipe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina Fil: Frizzo, Laureano Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Ciencias Veterinarias del Litoral. Universidad Nacional del Litoral. Facultad de Ciencias Veterinarias. Instituto de Ciencias Veterinarias del Litoral; Argentina Fil: Daurelio, Lucas Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina Fil: Bouzo, Carlos Alberto. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina |
| Databáze: | OpenAIRE |
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