Relationship between potassium fertilization and panicle blast severity in upland rice
The influence of K2O (0, 40, 80, 120 kg ha-1) at varying rates of N application (0, 30, 60 kg ha-1) at planting, on panicle blast (Pyricularia grisea (Cooke) Sacc.) was studied in a field experiment conducted during three consecutive years with the upland rice cultivar Douradão. Panicle blast severity decreased with increasing rates of potassium in the absence of nitrogen (N0). The relationship between panicle blast and K rates was quadratic at 30 kg ha-1 of nitrogen. Significant response to K fertilization was not obtained at 60 kg ha-1 of nitrogen in relation to panicle blast severity.
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Digital revista |
| Language: | English |
| Published: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
1999
|
| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000900025 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|