Aplicação superficial de calcário e diferentes resíduos em soja cultivada no sistema plantio direto

Abstract

SURFACE APPLICATION OF LIMESTONE AND DIFFERENT RESIDUES ON SOYBEAN GROWN IN NO-TILL SYSTEMThe practice of correcting soil acidity by surface application of pH-correcting materials on crop residues in the no-till system is restricted to limestone. No further studies are available on the use of steel slag, lime mud, and centrifuged sewage sludge. The objective of this study was to evaluate soil acidity and yield of soybean as a function of surface application of centrifuged sewage sludge, lime mud, steel slag, and dolomitic limestone. The study was conducted on a dystrophic Clayey Rhodic Hapludox soil, during the 2002-2005 cropping seasons, under no-till system. Treatments consisted on surface application of slag -E, lime mud -Lcal, centrifuged sewage sludge -LC, dolomitic limestone, and zero application of correcting materials, conducted in a random block design with four replicates. Surface application of steel slag, lime mud, and centrifuged sewage sludge allowed soil acidity correction, Ca 2+ displacement, increased base saturation, and Al 3+ reduction down to 40cm depth, whereas for limestone those effects occurred down to 20 cm. The interaction among those factors promoted a soybean yield increase for the LC, E, Lcal, and limestone treatments in the 2003/04 and 2004/05 seasons, as well as for the LC and E treatments in the 2002/03 season, under the no-till system.

The Comprehensive Utilization of Steel Slag in Agricultural Soils

“…Studies conducted by [19,22,[25][26][27][28] showed positive effects in soil acidity correction of surface application of steel slag compared to lime in no-tillage system, in tropical soil.…”

Combination between Acidity Amendments and Sewage Sludge with Phosphorus on Soil Chemical Characteristics and on Development of Castor Bean

“…In an experiment that analyzed dolomitic LS, centrifuged SSS, aqueous lime, and SS, SS was the most effective in amendment of soil acidity (Corrêa et al 2009). Carvalho-…”

Steel slag to correct soil acidity and as silicon source in coffee plants

“…Since high acidity rates characterize most soils in Brazil, soil acidity is one of the main causes of low yield, regardless of the production system (Corrêa et al, 2009;Nogueira et al, 2013). In areas with perennial crops, such as coffee plantation, acidity corrective is applied on the soil surface, although its incorporation to the soil is difficult and causes phytosanitary problems to the shrubs.…”