Artículos de revistas
NUTRITIONAL STATUS AND LEVELS OF HEAVY METALS IN LETTUCE PLANTS FERTILIZED WITH ORGANIC COMPOUNDS
Fecha
2014-06-01Registro en:
Bioscience Journal. Uberlandia: Univ Federal Uberlandia, v. 30, n. 3, p. 199-209, 2014.
1981-3163
WOS:000339322000021
WOS000339322000021.pdf
Autor
CCAAB UFRB
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Univ Fed Rural Pernambuco
Universidade Estadual Paulista (Unesp)
Universidade Federal de Goiás (UFG)
Institución
Resumen
The use of organic compounds has been a good option to reduce spending on fertilizers, and gain increased productivity in the cultivation of lettuce. However, given the wide variety of raw materials used in the preparation of organic compounds, studies are needed to evaluate its effects on the release of essential nutrients to plants and on the release of contaminants such as heavy metals. The aim of this study was to evaluate the mineral nutrition and heavy metal contamination of lettuce in soils treated with doses and types of compost. The experiment was conducted in a greenhouse in randomized blocks in factorial scheme 5x4, with five types of organic compounds and four nitrogen levels (0, 35, 70 and 140 kg ha(-1) of N), with four replications. In general, the doses of the compounds were not enough to provide the necessary quantity of nutrients to the lettuce, with the exception of nitrogen. There was no increase in levels of heavy metals in the soil above that allowed by Brazilian legislation. Furthermore, compounds based on manure plus grass, and commercial compound caused increases in Zn concentration in plants at levels above the recommended for consumed.