Título:	Relationship between panicle blast severity and mineral nutrient content of plant tissue in upland rice.
Autor:	FILIPPI, M. C. PRABHU, A. S.
Afiliación:	MARTA CRISTINA CORSI DE FILIPPI, CNPAF; ANNE SITARAMA PRABHU, CNPAF.
Año:	1998
Referencia:	Journal of Plant Nutrition, v. 21, n. 8, p. 1577-1587, Nov. 1998.
Descripción:	Panicle blast (Pyricularia grisea) in upland rice causes significant yield losses depending upon the environmental conditions and nutritional status of the plant at the grain-filling stage. Four field experiments were conducted to evaluate the influence of mineral nutrients on panicle blast of four upland rice genotypes on an oxisol. Panicle blast severities of four genotypes were related to nutrient concentrations in panicle tissues. Nitrogen (N), phosphorus (P), and magnesium (Mg) contents in tissue were significantly (P<0.01) and positively correlated, whereas potassium (K) and calcium (Ca) were negatively correlated with panicle blast severity. While the relationship between tissue N concentration and disease severity was quadratic, it was linear for K concentration. The correlation between tissue contents of N and P were positive and highly significant (r=0.75 P<0.001). Micronutrient tissue concentrations were not significantly correlated to panicle blast severities except for zinc (Zn). The low panicle blast severities of improved cultivar Guarani were associated with high K and Zn and low N, P, and Mg tissue concentrations.
Thesagro:	Arroz Brusone Nutriente Oryza Sativa Pyricularia Grisea
Palabras clave:	Blast Mineral nutrient
DOI:	https://doi.org/10.1080/01904169809365505
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPAF)