Doses e epocas de aplicacao de nitrogenio na cultura da mandioca (Manihot esculenta Crantz)

By:

GOMES, J. DE C

Contributor(s):

Material type: Article

ArticleLanguage: Portuguese Description: v. 1, p. 249-261Subject(s): LOC classification:

11010

In: In: Congresso Brasileiro de Mandioca (1, 1979, Cruz das Almas, Brasil). AnaisSummary: En un expt. establecido en el Centro Nacional de Pesquisa de Mandioca e Fruticultura, Brasil se estudio el efecto de 3 dosis y 6 epocas de aplicacion de N (40, 80 y 120 kg/ha) en la produccion de raices y parte aerea de yuca y en el contenido de almidon. Ademas en los ensayos se incluyeron un testigo absoluto (sin fertilizante NPK) y uno relativo (sin N) para determinar la dosis y epoca de aplicacion mas adecuadas. Se evaluaron los siguientes parametros: produccion de raices y parte aerea, altura de la planta, diametro del tallo y contenido de almidon; no se presento respuesta a la aplicacion de N. Se observo una tendencia a incrementar el rendimiento de raices con aplicaciones tardias de N. La fertilizacion basica NPK incremento el rendimiento de raices y de parte aerea. La aplicacion de los fertilizantes no afecto el contenido de almidon. (RA-CIAT)Summary: In expt. established at the Centro Nacional de Pesquisa de Mandioca e Fruticultura, Brazil, the effect of 3 rates of N application (40, 80, and 120 kg/ha) and 6 application times on cassava root and canopy production, and starch content was studied. In additional trials an absolute control (without NPK fertilizer) and a relative one (without N) were included in order to determine the best rate and application time. Parameters assessed were root and canopy production; plant height; stem diameter; and starch content. There was no response to N fertilization. A tendency for increasing root yield with late N application was observed. Basic NPK fertilization increased root and canopy yield. Fertilizer application did not affect starch content. (AS)

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Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Book Chapters	CIAT Library Document collection CINFOS	Document Collection CINFOS	11010 (Browse shelf(Opens below))	c.1	Short Loan		100046022

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En un expt. establecido en el Centro Nacional de Pesquisa de Mandioca e Fruticultura, Brasil se estudio el efecto de 3 dosis y 6 epocas de aplicacion de N (40, 80 y 120 kg/ha) en la produccion de raices y parte aerea de yuca y en el contenido de almidon. Ademas en los ensayos se incluyeron un testigo absoluto (sin fertilizante NPK) y uno relativo (sin N) para determinar la dosis y epoca de aplicacion mas adecuadas. Se evaluaron los siguientes parametros: produccion de raices y parte aerea, altura de la planta, diametro del tallo y contenido de almidon; no se presento respuesta a la aplicacion de N. Se observo una tendencia a incrementar el rendimiento de raices con aplicaciones tardias de N. La fertilizacion basica NPK incremento el rendimiento de raices y de parte aerea. La aplicacion de los fertilizantes no afecto el contenido de almidon. (RA-CIAT) spa

In expt. established at the Centro Nacional de Pesquisa de Mandioca e Fruticultura, Brazil, the effect of 3 rates of N application (40, 80, and 120 kg/ha) and 6 application times on cassava root and canopy production, and starch content was studied. In additional trials an absolute control (without NPK fertilizer) and a relative one (without N) were included in order to determine the best rate and application time. Parameters assessed were root and canopy production; plant height; stem diameter; and starch content. There was no response to N fertilization. A tendency for increasing root yield with late N application was observed. Basic NPK fertilization increased root and canopy yield. Fertilizer application did not affect starch content. (AS) eng