SciELO - Scientific Electronic Library Online

 
vol.33 issue1Quantitative parameters for assessing susceptibility to erosion in tropical Dominican soilsFertility and heavy metal contents of soils in the tropical agroecosys­tems of the Dominican Republic-Haiti frontier zone author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • Have no similar articlesSimilars in SciELO

Share


Revista de Ciências Agrárias

Print version ISSN 0871-018X

Abstract

SERRAO, M.G. et al. Impact of sewage sludge and mineral fertilizers application in soils un­der pasture from the Alentejo region. Rev. de Ciências Agrárias [online]. 2010, vol.33, n.1, pp.139-149. ISSN 0871-018X.

We evaluated the changes in the soil indi­cators pH in water, total OM and N, ex­changeable cations, available P, K, Cu, and Zn, heavy metals (Cd, Cr, Cu, Ni, Pb, and Zn), and faecal origin bacteria, between 2004 and 2007, as affected by sewage sludge (SS) application and mineral fertili­sation in two field experiments with pas­tures. The treatments were the combinations of two types of pasture (natural and sown) with three fertilisation treatments (0, SS, in­organic fertilisers) in the experiment of Herdade do Revez (Haplic Luvisols and Haplic Leptosols), and four fertilisation treatments (0, SS, Liming+SS, and Lim­ing+inorganic fertilisers) in Herdade da Criméia (Ferric Luvisols). The OM and available P contents were the chemical properties that significantly in­creased (P ≤ 5%) in the soil surface layer of both field experiments. The SS application also caused the highest significant increases in soil total N and exchangeable Mg con­tents in Herdade do Revez. Liming in­creased soil pH and exchangeable Mg, in Herdade da Criméia. The SS did not pollute the soils with heavy metals. The bacterial populations of faecal origin increased im­mediately after the SS application, but pro­gressively decreased as time went by, reach­ing values similar to the controls.

Keywords : contamination; indicators; mineral fertilisation; pasture; sewage sludge.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License