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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.1976.tde-20240301-152225
Document
Author
Full name
Manuel Cláudio Motta Macedo
Institute/School/College
Date of Defense
Published
Piracicaba, 1976
Supervisor
Title in Portuguese
Absorção de nutrientes por cultivares nacionais de batatinha (Solanum tuberosum L.)
Keywords in Portuguese
BATATA
NUTRIENTES MINERAIS DO SOLO
VARIEDADES VEGETAIS
Abstract in Portuguese
O presente trabalho teve como objetivo verificar as diferenças na acumulação da matéria seca, absorção e distribuição de nutrientes, entre os cultivares nacionais de batatinha: ARACY, ITAIQUARA, ABAETÊ, TEBERÊ, IAC-5555 e IAC-5603. O experimento foi conduzido em condições de campo, de outubro de 1974 a janeiro de 1975, na Estação Experimental de Capão Bonito, do Instituto Agronômico do Estado de São Paulo, em solo do grande grupo Latossol Vermelho Escuro fase orto. Utilizou-se uma adubação N - P2O5 - K2O de 70-300-105 Kg/ha no plantio e 70 Kg/ha de nitrogênio em cobertura 45 dias após. As plantas foram amostradas durante o desenvolvimento da cultura em intervalos de 20 dias a partir da germinação até a seca das folhas e hastes. Analisaram-se, na matéria seca, os teores de: nitrogênio, fósforo, potássio, cálcio, magnésio, enxofre, cobre e ferro. As curvas da marcha de absorção dos nutrientes e produção de matéria seca foram obtidas a partir de dados calculados por equações de regressão ajustadas. Consideraram-se como quantidades extraídas de nutrientes os pontos de máximo das equações ajustadas. O delineamento estatístico foi o de blocos ao acaso.
Title in English
Accumulation of dry matter, absorption and distribution of nutrients by six Brazilian potatoes cultivars (Solanum tuberosum L.)
Abstract in English
The main object of the present study was to obtain information on the accumulation of dry matter, absorption and distribution of nutrients by six potatoes cultivars (ARACY, ITAIQUARA, ABAETÊ, TEBERÊ, IAC-5555, IAC-5603). The experiment was conducted on a Red Dark Latossol at the Experimental Station in Capão Bonito, São Paulo. The experimental design utilized was a randomized complete block with four replications. Rates of nutrient utilized were as follows: 70 Kg/ha of N; 300 Kg/ha of P2O5 and 150 Kg/ha of K2O at planting time. All plots received an application of 70 Kg/ha of N in the dressing form, 45 days later. The stands corresponded to a population of 35,000 plants per hectare. Samplings of the plants were executed at intervals of 20 days until maturity. Dry matter contents of leaves, stems and tubers were determined, as well as the concentration of N, P, K, Ca, Mg, S, Cu and Fe.
 
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Publishing Date
2024-03-14
 
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