Desenvolvimento de yacón (Polymnia sonchifolia Poep. & Endl.) a partir de rizóforos e de gemas axilares, em diferentes espaçamentos
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Data
2002-12
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Universidade Estadual Paulista (Unesp)
Resumo
Com o objetivo de determinar a produção de yacón a partir de plantas oriundas de rizóforos e de gemas axilares em diferentes espaçamentos, a influência na produção de carboidratos e avaliação econômica da produção, instalou-se um experimento na área do Departamento de Produção Vegetal/Horticultura, da Faculdade de Ciências Agronômicas da UNESP, Campus de Botucatu-SP, com início em 13 de junho 2001 e término em 31 de janeiro de 2002. Os tratamentos resultaram da combinação dos espaçamentos entre linhas (1,0; 1,2; e 1,4m) e entre plantas (0,8 e 1,0m), com duas origens do material de multiplicação (rizóforos e gemas axilares). O delineamento experimental foi de parcelas subdivididas, com quatro repetições. As avaliações do desenvolvimento e da produção iniciaram-se 97 dias após o plantio (DAP), com intervalos de 20 dias, com determinação das variáveis: altura de planta, número de folhas, área foliar, massa seca das folhas, massa seca total da planta, área foliar específica (AFE), taxa de crescimento da cultura (TCC), índice de área foliar (IAF), taxa assimilatória líquida (TAL) e taxa de crescimento celativo (TCR). Determinou-se também, a concentração de carboidratos e realizou-se a análise econômica da produção total de raízes tuberosas. Os resultados indicaram diferenças entre as duas origens de plantas para todas as variáveis estudadas. As plantas oriundas de rizóforos apresentaram desenvolvimento superior àquelas provenientes de gemas axilares com exceção da produção de açúcares. Os espaçamentos entre linhas e entre plantas influenciaram a produção de parte aérea e de raízes tuberosas, sendo que nos maiores espaçamentos as plantas apresentaram maior rentabilidade econômica. A estimativa de máxima eficiência econômica para produção de raízes tuberosas foi obtida com os... .
The experiment was carried out at the Department of Plant Production of the Faculty of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, São Paulo State, Brazil, with the objective of determining the yacon yield from the plants originated from rizophores and axilar buds in differents spacements, the carbohydrates contents, and finally economic yield, from June-13, 2001 to January-31, 2002. Treatments resulted from the combination of the interrow spacings (1,0; 1,2; and 1,4m) and between plants (0,8 and 1,0m) with propagates material of two origins (rizophores and axilar buds), and in a split plot experimental design with four replicates. The development and yield evaluation begins 97 days after planting in 20 days intervals, in accordance with biometric parameters as follows: plant height, leaf numbers, leaf area, dry weight of the leaves, total dry weight of the plant and the physiological index: Specific Leaf Area (AFE), Crop Growth Rate (TCC), Leaf Area Index (IAF), Net Assimilatory Rates (TAL) and the Relative Growth Rate (TCR). The carbohydrtaes accumulation was determined too, with the accomplishment of the total yield economic analysis of the tubers production. Results indicated differences between the dual origin of the plants for all characteristics. The plants originated from rizophores showed superior development than that from axilar buds in all physiological parameters. The distance between rows and between plants influenced the production of the aerial parts and the tubers root, with the highest spacings presenting a larger economic profitability. The estimate of the maximum efficiency for the production of the root tubers was obtained with the treatments L1E1Y1 (1,0 x 0,8 x rizophores) and L3E1Y1 (1,4 x 0,8 x rizophores), nevertheless the treatment L3E1Y1 (1,4 x 0,8 x nodal shoot segments), showed the best as... (Complete abstract, click electronic address below).
The experiment was carried out at the Department of Plant Production of the Faculty of Agricultural Sciences, São Paulo State University (UNESP), Botucatu, São Paulo State, Brazil, with the objective of determining the yacon yield from the plants originated from rizophores and axilar buds in differents spacements, the carbohydrates contents, and finally economic yield, from June-13, 2001 to January-31, 2002. Treatments resulted from the combination of the interrow spacings (1,0; 1,2; and 1,4m) and between plants (0,8 and 1,0m) with propagates material of two origins (rizophores and axilar buds), and in a split plot experimental design with four replicates. The development and yield evaluation begins 97 days after planting in 20 days intervals, in accordance with biometric parameters as follows: plant height, leaf numbers, leaf area, dry weight of the leaves, total dry weight of the plant and the physiological index: Specific Leaf Area (AFE), Crop Growth Rate (TCC), Leaf Area Index (IAF), Net Assimilatory Rates (TAL) and the Relative Growth Rate (TCR). The carbohydrtaes accumulation was determined too, with the accomplishment of the total yield economic analysis of the tubers production. Results indicated differences between the dual origin of the plants for all characteristics. The plants originated from rizophores showed superior development than that from axilar buds in all physiological parameters. The distance between rows and between plants influenced the production of the aerial parts and the tubers root, with the highest spacings presenting a larger economic profitability. The estimate of the maximum efficiency for the production of the root tubers was obtained with the treatments L1E1Y1 (1,0 x 0,8 x rizophores) and L3E1Y1 (1,4 x 0,8 x rizophores), nevertheless the treatment L3E1Y1 (1,4 x 0,8 x nodal shoot segments), showed the best as... (Complete abstract, click electronic address below).
Descrição
Palavras-chave
Yacon - Crescimento, Produtividade, Análise econômico-financeira, Carboidratos
Como citar
AMAYA ROBLES, Julio Estuardo. Desenvolvimento de yacón (Polymnia sonchifolia Poep. & Endl.) a partir de rizóforos e de gemas axilares, em diferentes espaçamentos. 2002. xix, 89 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2002.