Absorcao de micronutrientes por duas cultivares de mandioca (Manihot esculenta Crantz)

By:

LORENZI, J.O

Contributor(s):

Material type: Article

ArticleLanguage: Portuguese Description: v. 2, p. 68-75Subject(s): LOC classification:

33623

In: In: Congresso Brasileiro de Mandioca (2, 1981, Vitoria-ES). AnaisSummary: En un ensayo de campo realizado en Campinas (Sao Paulo, Brasil) se determino la demanda por micronutrimentos de yuca cv. Branca de Santa Catarina e IAC-Mantiqueira. Se tomaron muestras en 6 epocas diferentes durante el desarrollo de la planta, a intervalos de 60 dias empezando despues de la iniciacion de la germinacion en las estacas. Las plantas muestreadas se dividieron en raices, tallos y hojas y se analizaron por Fe, Mn, Cu, Zn y B. Los resultados indicaron que los resp. rangos adecuados en hojas, tallos (120 dias) y raices (180 dias) son: 249-333, 131-145 y 154-174 ppm de Fe; 262-280, 106-113 y 7-12 ppm de Mn; 8-9, 11-13 y 2-3 ppm de Cu; 37-40, 29-34 y 9-13 ppm de Zn; y 46-52, 32-34 y 12-13 ppm de B. En prom., para ambos cv., la max. extraccion fue de 67.1, 34.4, 2.1, 7.5 y 14.2 g de Fe, Mn, Cu, Zn y B, resp., necesaria para la produccion de 1 t de raices y una exportacion max. de 29.5, 4.2, 0.9, 3.0 y 2.7 g/t de raices, resp. (RA-CIAT)Summary: In a field trial carried out in Campinas (Sao Paulo, Brazil), the demand for micronutrients of cassava cv. Branca de Santa Catarina and IAC- Mantiqueira were determined. Samples were taken at 6 different times during plant development, at 60-day intervals beginning after the initiation of sprouting in the cuttings. Sampled plants were divided into roots, stems, and leaves and analyzed for Fe, Mn, Cu, Zn, and B. Results indicated that the resp. adequate ranges in leaves, stems (120 days), and roots (180 days) are as follows: 249-333, 131-145, and 154-174 ppm Fe; 262- 280, 106-113, and 7-12 ppm Mn; 8-9, 11-13, and 2-3 ppm Cu; 37-40, 29-34, and 9-13 ppm Zn; and 46-52, 32-34, and 12-13 ppm B. On av., for both cv., the max. extraction was 67.1, 34.4, 2.1, 7.5, and 14.2 g Fe, Mn, Cu, Zn, and B, resp., necessary for the production of 1 t roots and a max. export of 29.5, 4.2, 0.9, 3.0, and 2.7 g/t roots, resp. (AS-CIAT)

Tags from this library: No tags from this library for this title.

Average rating: 0.0 (0 votes)

Holdings ( 1 )
Title notes ( 2 )

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	33623 (Browse shelf(Opens below))	v.2 c.1	Short Loan

Total holds: 0

En un ensayo de campo realizado en Campinas (Sao Paulo, Brasil) se determino la demanda por micronutrimentos de yuca cv. Branca de Santa Catarina e IAC-Mantiqueira. Se tomaron muestras en 6 epocas diferentes durante el desarrollo de la planta, a intervalos de 60 dias empezando despues de la iniciacion de la germinacion en las estacas. Las plantas muestreadas se dividieron en raices, tallos y hojas y se analizaron por Fe, Mn, Cu, Zn y B. Los resultados indicaron que los resp. rangos adecuados en hojas, tallos (120 dias) y raices (180 dias) son: 249-333, 131-145 y 154-174 ppm de Fe; 262-280, 106-113 y 7-12 ppm de Mn; 8-9, 11-13 y 2-3 ppm de Cu; 37-40, 29-34 y 9-13 ppm de Zn; y 46-52, 32-34 y 12-13 ppm de B. En prom., para ambos cv., la max. extraccion fue de 67.1, 34.4, 2.1, 7.5 y 14.2 g de Fe, Mn, Cu, Zn y B, resp., necesaria para la produccion de 1 t de raices y una exportacion max. de 29.5, 4.2, 0.9, 3.0 y 2.7 g/t de raices, resp. (RA-CIAT) spa

In a field trial carried out in Campinas (Sao Paulo, Brazil), the demand for micronutrients of cassava cv. Branca de Santa Catarina and IAC- Mantiqueira were determined. Samples were taken at 6 different times during plant development, at 60-day intervals beginning after the initiation of sprouting in the cuttings. Sampled plants were divided into roots, stems, and leaves and analyzed for Fe, Mn, Cu, Zn, and B. Results indicated that the resp. adequate ranges in leaves, stems (120 days), and roots (180 days) are as follows: 249-333, 131-145, and 154-174 ppm Fe; 262- 280, 106-113, and 7-12 ppm Mn; 8-9, 11-13, and 2-3 ppm Cu; 37-40, 29-34, and 9-13 ppm Zn; and 46-52, 32-34, and 12-13 ppm B. On av., for both cv., the max. extraction was 67.1, 34.4, 2.1, 7.5, and 14.2 g Fe, Mn, Cu, Zn, and B, resp., necessary for the production of 1 t roots and a max. export of 29.5, 4.2, 0.9, 3.0, and 2.7 g/t roots, resp. (AS-CIAT) eng