Soluble tissue sugar content and leaf blast severity in response to the application of calcinated serpentinite as a silicon source in irrigated rice

Summa Phytopathologica

Anne Sitarama Prabhu¹  Alberto Baêta Dos Santos¹  Agostinho Dirceu Didonet¹ 

[1] ,Embrapa Arroz e FeijãoSanto Antônio de Goiás GO

关键词: Magnaporthe grisea;    Pyricularia grisea;    Oryza sativa;    silicon sources;    Magnaporthe grisea;    Pyricularia grisea;    Oryza sativa;    fontes de silício;   

DOI  :  10.1590/S0100-54052007000400014

来源: SciELO

【 摘 要 】

A field experiment conducted with the irrigated rice cultivar BRS Formoso, to assess the efficiency of calcinated serpentinite as a silicon source on grain yield was utilized to study its effect on leaf blast severity and tissue sugar levels. The treatments consisted of five rates of calcinated serpentinite (0, 2, 4, 6, 8 Mg.ha-1) incorporated into the soil prior to planting. The leaf blast severity was reduced at the rate of 2.96% per ton of calcinated serpentinite. The total tissue sugar content decreased significantly as the rates of serpentinite applied increased (R² = 0.83). The relationship between the tissue sugar content and leaf blast severity was linear and positive (R² = 0.81). The decrease in leaf blast severity with increased rates of calcinated serpentinite was also linear (R²= 0.96) and can be ascribed to reduced sugar level.

【 授权许可】

CC BY   
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