Desempenho da mamoneira IAC 2028 em função do espaçamento entre fileiras e população de plantas na safrinha

Souza-Schlick, Genivaldo David de; Soratto, Rogério Peres; Pasquali, Coralie Bussamra; Fernandes, Adalton Mazetti

doi:10.1590/s0006-87052011000300006

Cited by 12 publications

(12 citation statements)

References 11 publications

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“…The average PH was 190.5 cm, value greater than those obtained by Ferreira et al (2009), Silva et al (2007 and Souza-Schlick et al (2011), which were 37, 58 and 136, respectively. The same occurred for SD whose average value of 34 mm was similar to the results obtained by these authors.…”

Section: Resultscontrasting

confidence: 62%

Agronomic performance of castor under different growing conditions

Torres¹,

Teodoro²,

Hernandes³

et al. 2016

Biosci. J.

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Castor has emerged as an oilseed species capable of meeting the demand of the Brazilian market.Thus, there is a need for studies to evaluate the different growing conditions that this species can be cultivated in order to subsidize their production. The study aimed to evaluate the influence of different growing conditions on agronomic performance of seven castor bean cultivars grown in Savanna-Pantanal ecotone region. The trial was conducted at Universidade Estadual de Mato Grosso do Sul, Aquidauana Campus. Treatments consisted of seven castor bean cultivars (BRS Energia, IAC-2028, IAC-Guarani, BRS Nordestina, BRS Paraguaçu, IAC-80 and IAC-226) and three growing conditions (with weed control and without topdress nitrogen; with topdress nitrogen at 80 kg ha -1 and with weed control; without weed control and absence of topdress nitrogen) in two agricultural years (2011 and 2012), arranged in randomized block design with three replications in factorial arrangement (7 x 3 x 2). The following variables were evaluated: plant height, stem diameter, number of bunches, number of fruits and fruit yield. The cultivars BRS Energia, IAC 2028, IAC Guarani and BRS Paraguaçu obtained greater fruit yield. Topdress nitrogen and weed control provided to cultivars the highest stem diameter, number of bunches, number of fruits and fruit yield.

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Section: Resultscontrasting

confidence: 62%

Agronomic performance of castor under different growing conditions

Torres¹,

Teodoro²,

Hernandes³

et al. 2016

Biosci. J.

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“…The dry matter of the two hybrids at the densities of 20,000 plants and 40,000 plants were similar, indicating that at the lower density the light resource was not fully exploited. Souza-Schlick et al (2011) also observed a reduction in total dry matter with an increase in the population density from 25 thousand to 70 thousand ha -1 plants. Reduction in dry matter is desirable if there is reduction in number of branches and height, aiming at the mechanized harvest.…”

Section: Resultsmentioning

confidence: 68%

“…The use of narrow and ultranarrow spacing altogether with the increase of the number of plants is a common practice in cotton crops and, allows its cultivation as a second crop due to the anticipation of the harvest provided by the reduction in boll number per plant (Jost & Cothren, 2000;Jost & Cothren, 2001;Gwathmey & Clement, 2010). In the castor bean crop, the number of racemes and the number of fruits/seeds per raceme Souza-Schlick et al, 2011) are also reduced.…”

Section: Introductionmentioning

confidence: 99%

Growth performance of castor bean hybrids under different plant densities

et al. 2017

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RESUMOCastor bean grown at high plant densities can increase yield due to increased light interception and reduction in sink demand. The objective of this study was to evaluate the effect of plant density on growth of castor bean hybrids. The experiment was conducted in Botucatu, SP, Brazil, in a split plot randomized block design, with four replications, in 2011 and 2012. The main plot consisted of the sampling times and the subplots consisted of a 3x3 factorial, with the 3 genotypes in the first factor and the 3 plant densities in the second factor. The variables analyzed were: dry mass of leaves, stems, racemes, and total dry matter, which were measured at 30, 60, 90, 120 and 150 days after emergence (DAE). Data were examined for significant differences using analysis of variance followed by the F test (p < 0.05). When interaction was found between the factors and sampling the means were analyzed by regression analysis (p < 0.05). Growth performance was higher in 2012 because of the greater water availability. In 2011, under lower rainfall, there was less branching resulting in cycle end, with total leaf loss. High plant densities partially suppress the development of higher-order structures, especially when associated with water restriction. Crescimento de híbridos de mamona sob densidades populacionais adensadasO cultivo de mamona sob altas densidades populacionais pode aumentar a produtividade devido à maior interceptação de luz e à redução dos drenos vegetativos. O objetivo desta pesquisa foi avaliar o efeito da densidade populacional de híbridos de mamona sobre o crescimento das plantas. O experimento foi conduzido em Botucatu, SP, em 2011 e 2012. O delineamento experimental utilizado foi de blocos ao acaso organizado em parcelas subdivididas com quatro repetições. As parcelas foram constituidas pelas coletas e as subparcelas foram constituídas por um fatorial 3x3. O primeiro fator foi composto por três genótipos e o segundo fator por três densidades populacionais. As variáveis analisadas foram matéria seca de folhas, caules, racemos e matéria seca total, realizadas ao 30, 60, 90, 120 e 150 dias após a emergência (DAE). Os dados foram submetidos à análise de variância pelo teste F (p < 0,05). Quando houve interação entre os fatores e coleta as médias foram analisadas por regressão (p < 0,05). O crescimento foi maior no ano de 2012 devido à maior disponibilidade hídrica. Em 2011, sob menor pluviosidade, houve menor ramificação resultando em fechamento do ciclo, com perda total das folhas nos híbridos. Altas densidades populacionais suprimem parcialmente o desenvolvimento de estruturas de ordem superiores, principalmente quando associadas à restrições hídricas.Palavras-chave: colheita mecânica; Ricinus communis L.; arranjo espacial.

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“…Kittock and Williams (1970) observed that, for short-height castor in a 1.02 m row spacing, the best plant population was 58,000 plants ha -1 under irrigation and 30,000 plants ha -1 under rainfed conditions. For the IAC 2028 cultivar, plant populations greater than 25,000 plants ha -1 did not increase the seed yield, regardless of the row spacing used, in the fall-winter cropping season (SOUZA-SCHLICK et al, 2011). Soratto et al (2012) reported that the seed yield of castor genotypes in fall-winter was greater for more equidistant plant arrangements and that an increase in the plant population did not affect the seed yield when the same row spacing (0.90 m in this case) was used.…”

Section: Introductionmentioning

confidence: 82%

<b>Optimizing row spacing and plant population arrangement for a new short-height castor genotype in fall-winter

2014

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ABSTRACT. Plant population and arrangement should be properly designed to maximize the seed yield of short-height genotypes of castor (Ricinus communis L.) in each cropping season. Experiments were performed in the in the fall-winter cropping season of 2008 and 2009 in Botucatu, State of São Paulo, Brazil, to evaluate the effects of row spacing (0.45, 0.60, 0.75, and 0.90 m) and plant population (25,000, 40,000, 55,000, and 70,000 plants ha -1 ) on agronomical traits, yield components, seed yield, and oil yield of the genotype FCA-PB. A high plant density caused a reduction in plant survival and increased the first raceme insertion height, particularly in the year with the higher rainfall. The basal stem diameter, number of racemes per plant, and seeds per raceme were reduced by increasing the plant density. However, the seed and oil yields were minimally influenced by plant population density and row spacing because the castor plant compensated for a low plant population with a high number of racemes and seeds. The maximum seed yield was achieved with an estimated 0.64 m of row spacing and 50,107 plants ha Keywords: Ricinus communis, spatial plant distribution, plant density, grain yield, oil content.Combinação ótima de espaçamento e população de plantas para um novo genótipo de mamona de porte baixo na safrinha RESUMO. Para maximizar a produtividade de grãos de genótipos de mamona (Ricinus communis L.) de porte baixo, devem ser definidos a população e o arranjo de plantas mais adequados a cada época de cultivo. Foi conduzido um experimento no outono-inverno dos anos de 2008 e 2009, em Botucatu-SP, para avaliar os efeitos do espaçamento entre fileiras (0,45; 0,60; 0,75 e 0,90 m) e da população de plantas (25.000, 40.000, 55.000 e 70.000 plantas ha -1 ) sobre as características agronômicas, componentes da produção, produtividade de grãos e de óleo do genótipo FCA-PB. Elevada densidade de plantas provocou redução na sobrevivência das mesmas e aumentou a altura de inserção do primeiro racemo, especialmente no ano com maior disponibilidade hídrica. O diâmetro do caule, o número de racemos por planta e de sementes por racemo foram reduzidos com o aumento da densidade de plantas. As produtividades de grãos e de óleo foram pouco influenciadas pela população de plantas e espaçamento entre fileiras, pois a mamoneira compensa um baixa população de plantas, com um elevado número de racemos e grãos por planta. A máxima produtividade de grãos foi obtida com o espaçamento entre fileiras estimado de 0,64 m e 50.107 plantas ha -1 (ou seja, 3,2 plantas m -1 ).Palavras-chave: Ricinus communis, distribuição especial de plantas, densidade de plantas, produtividade de grãos, teor de óleo.

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Desempenho da mamoneira IAC 2028 em função do espaçamento entre fileiras e população de plantas na safrinha

Cited by 12 publications

References 11 publications

Agronomic performance of castor under different growing conditions

Agronomic performance of castor under different growing conditions

Growth performance of castor bean hybrids under different plant densities

<b>Optimizing row spacing and plant population arrangement for a new short-height castor genotype in fall-winter

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