Phosphorus loss by surface runoff in no-till system under mineral and organic fertilization

Scientia Agricola

Oromar João Bertol²  Nivaldo Eduardo Rizzi¹  Nerilde Favaretto¹  Maria Do Carmo Lana¹ 

[1] ,EMATERCuritiba PR ,Brasil

关键词: liquid swine manure;    water quality;    eutrophication;    soil erosion;    conservation tillage;    dejeto líquido de suíno;    qualidade de água;    eutrofização;    erosão do solo;    sistema conservacionista;   

DOI  :  10.1590/S0103-90162010000100010

来源: SciELO

【 摘 要 】

The no-till system has been intensively used in the state of Paraná, Brazil, and it has increased the nutrients level at the soil surface. This has contributed for nutrient losses via runoff and consequently, off-site water pollution. The objective of this study was to evaluate phosphorus loss in surface runoff by simulated rainfall on an Oxisol, under no-till system following application of mineral fertilizer and liquid swine manure. Nitrogen, soil and water losses from the same study are reported in a separated paper. The application of liquid swine manure, compared with mineral fertilization, increased runoff concentration of total P, particulate P and dissolved reactive P by 193%, 111% and 506%, respectively, averaged for all rainfall intensities. Independently on the fertilizer source, the highest rainfall intensity provided the greatest concentration and loads of P in runoff.

【 授权许可】

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