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| 1. |  | LIZARRALDE, C.; BAETHGEN, W.; CADENAZZI, M.; CAPURRO, M.C.; SAWCHIK, J. Phosphorus runoff in a non-fertilized soybean production system of SW Uruguay: abstract. Agrociencia Uruguay, v. 19, special issue "Inter-Regional CIGR Conference on Land and Water Challenges, 3., La Estanzuela, Colonia, UY. Tools for developing; "Dr. Mario García Petillo"", p. 24, 2015.| Biblioteca(s): INIA La Estanzuela. |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
12/10/2015 |
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Actualizado : |
12/10/2015 |
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Tipo de producción científica : |
Trabajos en Congresos/Conferencias |
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Autor : |
LIZARRALDE, C.; BAETHGEN, W.; CADENAZZI, M.; CAPURRO, M.C.; SAWCHIK, J. |
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Afiliación : |
CAROLINA ANGELA LIZARRALDE PIQUET, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; WALTER BAETHGEN, Columbia University. International Research Institute for Climate and Society.; MÓNICA CADENAZZI, Universidad de la República (UdelaR), Uruguay.; MARIA CRISTINA CAPURRO BAZZANO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JORGE SAWCHIK PINTOS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Phosphorus runoff in a non-fertilized soybean production system of SW Uruguay: abstract. |
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Fecha de publicación : |
2015 |
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Fuente / Imprenta : |
Agrociencia Uruguay, v. 19, special issue "Inter-Regional CIGR Conference on Land and Water Challenges, 3., La Estanzuela, Colonia, UY. Tools for developing; "Dr. Mario García Petillo"", p. 24, 2015. |
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ISSN : |
1510-0839. |
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Idioma : |
Inglés |
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Contenido : |
Since 2001/2002 there has been a formidable expansion of annual crops in Uruguay which has determined changes in land
use, with a strong expansion of soybeans (Glycine max) under no-tillage. Improperly managed crop production systems can
be an important nonpoint source of pollution, accelerating eutrophication of surface waters resulting from nitrogen and phosphorus
(P) inputs. Nutrient losses depend on many factors such as climate, soil characteristics and management practices. Thus, the
objective of this work was to estimate the annual P loss on a cropping system and to determine the main factors contributing
to such losses. Runoff plots were located at the Experimental Station of the National Agricultural Research Institute in Colonia
(INIA "La Estanzuela"), Uruguay (34º25´S, 58º0´W) during the period 2013-2014. Plots were under a Vertic Argiudoll soil with
18.5 mg/kg P-Bray I on the first 7,5 cm, a 3% slope and available water content of 92.7 mm on the first 56 cm of soil depth. The
rotation established was soybean - fallow/cover crop, non-fertilized for over 5 years. The amount of runoff water was measured
for 23 rainfall events and analyzed for soluble P. During that period the soybean yield was similar to the national average yield
and the annual P loss was 0.5 kg/ha. Available water, precipitation, maximum rainfall intensity and runoff explained most of the
variation in P runoff losses. Rainfall events of high magnitude and intensity on soils with high available water were identified as
the events that produced higher water and P runoff. On the other hand, the model that best fitted P losses was just explained by
rainfall and runoff (P = - 9.99 + 0.95*rainfall +21.56*runoff; R2=0.73). Overall, our results indicate that these soybean-cover
crop systems under no-tillage, on soils with proper nutrient status and non-fertilized for a long time seem to be economically
and environmentally adequate management systems MenosSince 2001/2002 there has been a formidable expansion of annual crops in Uruguay which has determined changes in land
use, with a strong expansion of soybeans (Glycine max) under no-tillage. Improperly managed crop production systems can
be an important nonpoint source of pollution, accelerating eutrophication of surface waters resulting from nitrogen and phosphorus
(P) inputs. Nutrient losses depend on many factors such as climate, soil characteristics and management practices. Thus, the
objective of this work was to estimate the annual P loss on a cropping system and to determine the main factors contributing
to such losses. Runoff plots were located at the Experimental Station of the National Agricultural Research Institute in Colonia
(INIA "La Estanzuela"), Uruguay (34º25´S, 58º0´W) during the period 2013-2014. Plots were under a Vertic Argiudoll soil with
18.5 mg/kg P-Bray I on the first 7,5 cm, a 3% slope and available water content of 92.7 mm on the first 56 cm of soil depth. The
rotation established was soybean - fallow/cover crop, non-fertilized for over 5 years. The amount of runoff water was measured
for 23 rainfall events and analyzed for soluble P. During that period the soybean yield was similar to the national average yield
and the annual P loss was 0.5 kg/ha. Available water, precipitation, maximum rainfall intensity and runoff explained most of the
variation in P runoff losses. Rainfall events of high magnitude and intensity on soils with high available wate... Presentar Todo |
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Palabras claves : |
ESCORRENTÍA DE FÓSFORO; ESCURRIMIENTO DE FÓSFORO; EUTROFICACIÓN; PÉRDIDAS DE FÓSFORO. |
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Thesagro : |
GLYCINE MAX; SIEMBRA DIRECTA; SOJA; SUELOS. |
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Asunto categoría : |
P30 Ciencia del suelo y manejo del suelo |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/5053/1/Agrociencia-Congreso-CIGR2015-v.19.si.p.24-LIZARRALDE.pdf
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Marc : |
LEADER 02846nam a2200265 a 4500
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008 2015 bl uuuu u01u1 u #d
022 $a1510-0839.
100 1 $aLIZARRALDE, C.
245 $aPhosphorus runoff in a non-fertilized soybean production system of SW Uruguay$babstract.
260 $aAgrociencia Uruguay, v. 19, special issue "Inter-Regional CIGR Conference on Land and Water Challenges, 3., La Estanzuela, Colonia, UY. Tools for developing; "Dr. Mario García Petillo"", p. 24$c2015
520 $aSince 2001/2002 there has been a formidable expansion of annual crops in Uruguay which has determined changes in land use, with a strong expansion of soybeans (Glycine max) under no-tillage. Improperly managed crop production systems can be an important nonpoint source of pollution, accelerating eutrophication of surface waters resulting from nitrogen and phosphorus (P) inputs. Nutrient losses depend on many factors such as climate, soil characteristics and management practices. Thus, the objective of this work was to estimate the annual P loss on a cropping system and to determine the main factors contributing to such losses. Runoff plots were located at the Experimental Station of the National Agricultural Research Institute in Colonia (INIA "La Estanzuela"), Uruguay (34º25´S, 58º0´W) during the period 2013-2014. Plots were under a Vertic Argiudoll soil with 18.5 mg/kg P-Bray I on the first 7,5 cm, a 3% slope and available water content of 92.7 mm on the first 56 cm of soil depth. The rotation established was soybean - fallow/cover crop, non-fertilized for over 5 years. The amount of runoff water was measured for 23 rainfall events and analyzed for soluble P. During that period the soybean yield was similar to the national average yield and the annual P loss was 0.5 kg/ha. Available water, precipitation, maximum rainfall intensity and runoff explained most of the variation in P runoff losses. Rainfall events of high magnitude and intensity on soils with high available water were identified as the events that produced higher water and P runoff. On the other hand, the model that best fitted P losses was just explained by rainfall and runoff (P = - 9.99 + 0.95*rainfall +21.56*runoff; R2=0.73). Overall, our results indicate that these soybean-cover crop systems under no-tillage, on soils with proper nutrient status and non-fertilized for a long time seem to be economically and environmentally adequate management systems
650 $aGLYCINE MAX
650 $aSIEMBRA DIRECTA
650 $aSOJA
650 $aSUELOS
653 $aESCORRENTÍA DE FÓSFORO
653 $aESCURRIMIENTO DE FÓSFORO
653 $aEUTROFICACIÓN
653 $aPÉRDIDAS DE FÓSFORO
700 1 $aBAETHGEN, W.
700 1 $aCADENAZZI, M.
700 1 $aCAPURRO, M.C.
700 1 $aSAWCHIK, J.
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INIA La Estanzuela (LE) |
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