Absorption, accumulation and distribution of metals and nutrient elements in poplars planted in land amended with composted sewage sludge: A field trial.
Ecotoxicol Environ Saf
; 182: 109360, 2019 Oct 30.
Article
en En
| MEDLINE
| ID: mdl-31265970
ABSTRACT
Interest in the application of sewage sludge as amendments to grow trees has continued to increase, especially for fast-growing trees such as poplars. In this study, two-year field trial was conducted to determine the effects of compost sewage sludge (CSS) soil application on the distributions of metal and nutrient elements in poplars (Populusâ¯×â¯euramericana 'Guariento') and poplar growth. Soil was amended with one of four CSS treatments in both study years control (2012, 2013 0â¯t/ha), SS1 (2012 7.5â¯t/ha, 2013 15â¯t/ha), SS2 (2012 15â¯t/ha, 2013 30â¯t/ha), and SS3 (2012 30â¯t/ha, 2013 45â¯t/ha). During the two-year field trial period, CSS treatments significantly affected leaf K, Mg, Ni, Cr, and Pb contents and root P contents. The element contents in different plant parts responded differently to the different CSS application rates; microelement contents in roots and trace element contents in leaves were significantly affected by the high sludge treatment. The CSS application significantly influenced Ca, Na, Cu, Ni, and Pb accumulation in aerial parts of poplar and the distributions of N, S, Ni, Mg, and P between roots and leaves or stems, and significantly increased the diameter at breast height (DBH) of poplars by 2.4-18.6%. The CSS application of 15â¯t/ha per year resulted in the largest average increase in DBH of 11.1%; therefore, it could be considered as the most suitable application rate. In summary, CSS application can improve nutrition uptake in various parts of poplars and promote the growth of poplar. Poplar forest amendment is a good CSS disposal strategy.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminantes del Suelo
/
Eliminación de Residuos Líquidos
/
Metales Pesados
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Populus
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Año:
2019
Tipo del documento:
Article