Portal de Periódicos da CAPES

Toxidez de manganês de um solo ácido na simbiose soja – Rhizobium

1971; Embrapa Informação Tecnológica; Volume: 6; Issue: 1 Linguagem: Inglês

1678-3921

Clovis Batista Nascimento, Rubens Pinto de Mello, Maria Wanda dos Santos, Renée Vieira do Nascimento, Durval José de Souza,

Plant Micronutrient Interactions and Effects

In two greenhouse experiments a soybean growth and nitrogen fixation with Rhizobium japonicum were conducted on a soil high in manganese. The soybean pants showed a high manganese toxicity to the soil. Dilution of the soil with sand increased nitrogen fixation and plant growth 4 to 6 times and the addition of lime 2 to 3 times. Nodule number, weight and size were even more affected by manganese toxicity. Manganese absorption by the plant was found to be dependent on the dilution, soil pH and other uncontrolled factors. Nodulation and nitrogen fixation were more sensitive to manganese toxicity than plant growth. Soybean varieties and strains of Rhizobium varied as to their tolerance to maganese toxicity and absorption of manganese by the plant.