Anaerobic digestates from sewage sludge used as fertilizer on a poor alkaline sandy soil and on a peat substrate: Effects on tomato plants growth and on soil properties

被引:61
作者
Cristina, Giulio [1 ]
Camelin, Enrico [1 ]
Tommasi, Tonia [1 ]
Fino, Debora [1 ]
Pugliese, Massimo [2 ,3 ]
机构
[1] Politecn Torino, Dept Appl Sci & Technol DISAT, Corso Duca Abruzzi 24, I-10129 Turin, TO, Italy
[2] Univ Torino, Agr Forestry & Food Sci Dept DISAFA, Largo Paolo Braccini 2, I-10095 Grugliasco, TO, Italy
[3] Univ Torino, AGROINNOVA Ctr Competence Innovat Agroenvironm Se, Largo Paolo Braccini 2, I-10095 Grugliasco, TO, Italy
关键词
Waste management; Nitrogen; Soil organic matter; Nutrient recycling; Sewage sludge; Tomato plants; AMENDMENT; WASTE; YIELD; STABILIZATION; DIGESTION; COMPOST; QUALITY; METALS; CHERRY;
D O I
10.1016/j.jenvman.2020.110767
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Anaerobic digestates from sewage sludge (SSADs) are a by-product of the wastewater treatment process that still preserves a certain agronomic interest for its richness in plant nutrients and organic matter. Fertilizing properties of two liquid and two dewatered SSADs were tested on tomato plants (Solanum lycopersicum L.). Pot experiments were performed on sandy soil and peat substrate under greenhouse conditions with a SSADs application rate of 170 kg N/ha over a period of three months. Beneficial effects of SSADs were reported on different growth parameters, revealing an increase in biomass and height up to 37.5 and 6-folds over untreated control. No phytotoxic effect occurred on SSAD-exposed plants. Chemical analysis of soils treated with SSADs showed enrichment of macro- and micro-nutrients as well as organic matter. In some cases, the chemical characterization of leaves revealed an enhancement of uptaken macronutrients. This study contributed in general to deepen the knowledge on the short-term growing season fertilizing effects of SSAD. Despite the treatment dosage was calculated only on nitrogen requirements, the study highlighted the importance of the other nutrients and organic matter on plant growth.
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页数:12
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