Pulsos de lixiviacion de nitratos en suelos destinados a céspedes.

CIVEIRA G, FAURE; RS LAVADO, G RUBIO

Ciencia del Suelo

ASOCIACIÓN ARGENTINA DE LA CIENCIA DEL SUELO

Año: 2003 vol. 21 p. 71 - 73

0326-3169

Vehicular and foot traffic increase soil compaction in sport and recreational areas, reducing shoot and root growth and overall quality of turfgrasses. Soil enrichment with sands is a common practice to cope with this problem,. Sand-soil mixtures require a high input of fertilizers and water to maintain a high quality surface. These practices may increase contamination of groundwaters. The objective of this work was to evaluate the effect of soil composition , nitrogen fertilization and irrigation on nitrate leaching in turfgrass soils. Plants of Lolium perenne were grown in pot culture in 3 different growing media (topsoil plus 10, 40 or 70% sand v/v) , two nitrogen treatments and two irrigation regimes. Plant biomass and nitrate in the leaching water was measured several times along the growing period (7 months). Increases in nitrate concentration of leaching water was observed right after nitrogen fertilization in high nitrogen treatment pots. These nitrate pulses were not affected by irrigation regime of soil treatments. No significant treatment effects were observed in the other sampling dates. Discussion is given on management strategies to reduce nitrate leaching.Lolium perenne were grown in pot culture in 3 different growing media (topsoil plus 10, 40 or 70% sand v/v) , two nitrogen treatments and two irrigation regimes. Plant biomass and nitrate in the leaching water was measured several times along the growing period (7 months). Increases in nitrate concentration of leaching water was observed right after nitrogen fertilization in high nitrogen treatment pots. These nitrate pulses were not affected by irrigation regime of soil treatments. No significant treatment effects were observed in the other sampling dates. Discussion is given on management strategies to reduce nitrate leaching.