The role of NPK-fertilization in inducing resistance in cassava to cassava bacterial blight

By:

Arene, O.B

Contributor(s):

Odurukwe, S.O

Material type: Text

TextLanguage: English Publication details: Umudike, NG National Root Crops Research Institute (NRCRI) 1978Description: 8 pSubject(s): LOC classification:

10430

Summary: En relacion con la severidad del CBB se estudio el efecto de la fertilizacion con NPK sobre el vigor al comienzo del crecimiento de 4 cultivares de yuca de susceptibilidad predeterminada. Se utilizo un diseno de bloques completos al azar con 10 replicaciones. Los parametros estudiados fueron la altura, el peso fresco y el contenido de MS. El analisis de los tejidos demostro que el cv. menos susceptible tenia significativamente menos N, Ca, Mg, P y K que el cv. mas susceptible. Se observo la tendencia opuesta entre los parametros para el vigor, los cuales fueron significativamente bajos en el cv. muy susceptible. En un experimento factorial de 3(3), se estudio la relacion de la nutricion a base de NPK, con el vigor y el CBB. El vigor aumento con el incremento de los niveles de NPK hasta cierto punto, despues del cual disminuyo. Por lo tanto, parece que la tolerancia al CBB debida a la fertilizacion se relaciona con el vigor de la planta. (RA-CIAT)Summary: The effect of NPK fertilization on early growth vigor of cassava in relation to CBB severity was studied in 4 cv. of predetermined susceptibility, using a randomized complete block design with 10 replications. Parameters of vigor studied were height, fresh wt and DM content. Tissue analysis showed the less susceptible cv. had significantly less N, Ca, Mg, P and K than the most susceptible one. The opposite trend was observed among the parameters for vigor, which were significantly low in the very susceptible cv. In a (3)3 factorial expt the relationship of NPK nutrition to vigor and CBB was studied. Vigor increased with an increase in NPK levels up to a point and then decreased at higher levels of fertilization. It seems, therefore, that tolerance to CBB due to fertilization is related to plant vigor. (AS)

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Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Books	CIAT Library Document collection CINFOS	Document Collection CINFOS	10430 (Browse shelf(Opens below))	c.1	Short Loan		100043874

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En relacion con la severidad del CBB se estudio el efecto de la fertilizacion con NPK sobre el vigor al comienzo del crecimiento de 4 cultivares de yuca de susceptibilidad predeterminada. Se utilizo un diseno de bloques completos al azar con 10 replicaciones. Los parametros estudiados fueron la altura, el peso fresco y el contenido de MS. El analisis de los tejidos demostro que el cv. menos susceptible tenia significativamente menos N, Ca, Mg, P y K que el cv. mas susceptible. Se observo la tendencia opuesta entre los parametros para el vigor, los cuales fueron significativamente bajos en el cv. muy susceptible. En un experimento factorial de 3(3), se estudio la relacion de la nutricion a base de NPK, con el vigor y el CBB. El vigor aumento con el incremento de los niveles de NPK hasta cierto punto, despues del cual disminuyo. Por lo tanto, parece que la tolerancia al CBB debida a la fertilizacion se relaciona con el vigor de la planta. (RA-CIAT) spa

Trabajo presentado a la 8th Annual Conference of the Nigerian Society for Plant Protection, University of Benin, Benin City, Feb. 27 March 1, 1978

The effect of NPK fertilization on early growth vigor of cassava in relation to CBB severity was studied in 4 cv. of predetermined susceptibility, using a randomized complete block design with 10 replications. Parameters of vigor studied were height, fresh wt and DM content. Tissue analysis showed the less susceptible cv. had significantly less N, Ca, Mg, P and K than the most susceptible one. The opposite trend was observed among the parameters for vigor, which were significantly low in the very susceptible cv. In a (3)3 factorial expt the relationship of NPK nutrition to vigor and CBB was studied. Vigor increased with an increase in NPK levels up to a point and then decreased at higher levels of fertilization. It seems, therefore, that tolerance to CBB due to fertilization is related to plant vigor. (AS) eng