4 results

Nitrate and ammonium in soil solution in tobacco management systems

Douglas Rodrigo Kaiser, Dalvan José Reinert, José Miguel Reichert, Carlos Arnoldo Streck, André Pellegrini

01/Apr/2010

Tobacco farmers of southern Brazil use high levels of fertilizers, without considering soil and environmental attributes, posing great risk to water resources degradation. The objective of this study was to monitor nitrate and ammonium concentrations in the soil solution of an Entisol in and below the root zone of tobacco under conventional tillage (CT), minimum tillage (MT) and no-tillage (NT). The study was conducted in the small-watershed Arroio Lino, in Agudo, State of Rio Grande do Sul, Brazil. A base […]

Cation leaching favored by inorganic anions and low molecular mass organic acids in soils fertilized with different poultry litters

Fabrício de Oliveira Gebrim, Ivo Ribeiro Silva, Roberto Ferreira Novais, Leonardus Vergütz, Lorena Costa Procópio, Tiago Novais Nunes, [...]

01/Dec/2008

The exponential growth in poultry farming in Brazil has led to a parallel increase in the production of manure and poultry litter. The litter generated in this activity used to be largely employed as cattle feed. However, the enactment of a law that bans the use of poultry litter as animal feed intensified its use as organic fertilizer in agriculture. Despite its importance, there are gaps in our knowledge on an adequate use to obtain high plant yields without threatening […]

Soil nitrate as affected by pig slurry application under no-till corn

Celso Aita, Sandro José Giacomini

01/Oct/2008

The application of animal manure to the soil, particularly those generated in pig farms, has become an increasingly common practice in southern Brazil. However, depending on the dose applied, there is a risk of nutrient losses, mainly nitrate (NO3–), to the water courses through leaching and runoff, and to the atmosphere as N-oxide emissions. The objective of this work was to evaluate the accumulation and displacement of N-NO3– in the soil after pig slurry application in no-tillage corn. The doses […]

Deep-Litter and pig slurry as nitrogen sources for corn

Sandro José Giacomini, Celso Aita

01/Feb/2008

Most of the pig manure generated in the swine production in southern Brazil is handled and stored as liquid manure, but there is a growing interest in adopting the deep-litter production system and using the resulting organic material as fertilizer. A field experiment was carried out on a typic Hapludalf in an experimental area of the Universidade Federal de Santa Maria, Santa Maria, state of Rio Grande do Sul, from October 2002 to March 2003, to evaluate the soil N […]