Nutrient accumulation and biomass production of alfafa after soil amendment with silicates

Revista Ceres

Angélica Cristina Fernandes Deus²  Leonardo Theodoro Bull¹  Juliano Corulli Corrêa¹  Roberto Lyra Villas Boas¹ 

[1] ,Universidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciências Agronômicas de Botucatu Departamento de Solos e Recursos AmbientaisBotucatu São Paulo ,Brazil

关键词: slag;    soil acidity;    ECC;    Medicago sativa;    escória de aciaria;    acidez;    PRNT;    Medicago sativa L.;   

DOI  :  10.1590/S0034-737X2014000300016

来源: SciELO

【 摘 要 】

Studies on the use of silicate correctives in agriculture show that they have great potential to improve soil chemical characteristics, however, little information is available on the reactivity rates of their particle-size fractions. This study investigated whether the reactivity rates obtained experimentally could be considered in the calculation of ECC (effective calcium carbonate) for soil liming, promoting adequate development of alfalfa plants. Six treatments were evaluated in the experiment, consisting of two slag types applied in two rates. The experimental ECC was used to calculate one of the rates and the ECC determined in the laboratory was used to calculate the other. Rates of limestone and wollastonite were based on the ECC determined in laboratory. The rates of each soil acidity corretive were calculated to increase the base saturation to 80%. The treatments were applied to a Rhodic Hapludox and an Alfisol Ferrudalfs. The methods for ECC determination established for lime can be applied to steel slag. The application of slag corrected soil acidity with consequent accumulation of Ca, P, and Si in alfalfa, favoring DM production.

【 授权许可】

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