PROGRESSES IN ALFALFA'S TOLERANCE TO ACID SOILS

• Autor(a) principal: MONTARDO, DANIEL PORTELLA
• Data de Publicação: 2000
• Outros Autores: DALL'AGNOL, MIGUEL, CAETANO, JOÃO HENRIQUE SILVA, COSTA, JOSÉ QUIRINO FREITAS FERREIRA
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
• Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/451
• topic: aluminum, genetic improvement, Medicago saliva, selection, solution culture.; alumínio, Medicago saliva, melhoramento genético, seleção genética, solo ácido, solução nutritiva.

The objective of this research work was to test two improved populations of alfalfa for tolerance to acid soils, one selected for two cycles in soil and one for two cycles in solution culture, in five levels of pH. The aluminum tolerance was assessed by measuring the plants height and the roots length. Results indicated progress in alfalfa's tolerance to acid soils, evaluated by plants height and roots lenght by both methodologies of selection. The productive potential of the selected populations was not reduced in the absence of aluminum. The solution culture selection was as efficient as the soil selection for alfalfa's tolerance to acidity. Correlation between plants height and roots lenght was positive and significant.