Applying phosphorus indices at a small agricultural watershed in Southern Brazil

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dc.date.accessioned2018-04-09T11:25:19Z
dc.date.available2018-04-09T11:25:19Z
dc.date.issued2018-04-04
dc.description.everythingGedruckte Ausg. im Verlag Kassel Univ. Press (www.upress.uni-kassel.de) erschienen.ger
dc.identifier.issn1612-9830
dc.identifier.issn2363-6033
dc.identifier.uriurn:nbn:de:hebis:34-2018010454110
dc.identifier.urihttp://hdl.handle.net/123456789/2018010454110
dc.language.isoeng
dc.publisherKassel University Pressger
dc.rightsUrheberrechtlich geschützt
dc.rights.urihttps://rightsstatements.org/page/InC/1.0/
dc.subjectP-indexeng
dc.subjectP risk assessmenteng
dc.subjectwater qualityeng
dc.subjectcatchmenteng
dc.subjectriparian vegetationeng
dc.subjectrunoffeng
dc.subject.ddc630
dc.titleApplying phosphorus indices at a small agricultural watershed in Southern Brazileng
dc.typeAufsatz
dcterms.abstractBest management practices at watershed scale are essential to mitigate water pollution. The objectives of this study were: (1) to estimate the P-index in a small watershed with intensive agricultural use applying five P-index versions at three scales (watershed, sub-basin and agricultural field); (2) to assess the effect of the connectivity factors (distance between the agricultural field and the stream and width of riparian native vegetation) in estimating the risk of P loss. The five P-index versions resulted in a similar risk of P loss, 75 to 83 % of the whole watershed scale (agricultural plus forest areas) was classified as low or very low risk for P loss. At the agricultural area scale, 79 to 100 % of this area was classed as high and very high risk for P loss. The low risk of P loss at watershed scale is explained by the high occurrence of forest vegetation. The reduced distance between agricultural land and streams and/or the reduced width of riparian native vegetation increased the risk of P loss. Estimated P-index values at a sub-basin scale indicated lower risk of P loss compared to agricultural field scale. In order to better estimate the risk of P loss at an agricultural field scale, we advise using a P-index which considers also connectivity factors.eng
dcterms.accessRightsopen access
dcterms.bibliographicCitationIn: Journal of Agriculture and Rural Development in the Tropics and Subtropics. Kassel : Kassel University Press. - Vol. 119, No. 1 (2018) S. 23-35
dcterms.creatorWaltrick, Josiane C. N.
dcterms.creatorGoularte, Gabriel D.
dcterms.creatorFavaretto, Nerilde
dcterms.creatorSouza, Luiz C. P.
dcterms.creatorDieckow, Jeferson
dcterms.creatorPauletti, Volnei
dcterms.creatorVezzani, Fabiane Machado
dcterms.creatorAlmeida, Luciano
dcterms.creatorMinella, Jean Paolo Gomes

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Vol 119, No 1 (2018)