Tamanho amostral para ensaios de mecanismos dosadores de sementes de milho em esteira carpetada

Dias, Vilnei de Oliveira; Alonço, Airton dos Santos; Carpes, Dauto Pivetta; Veit, André Augusto; Souza, Lucas Barros de

doi:10.1590/s0100-69162014000500021

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…The observed spacing number was according to the methodology proposed by Dias et al (2014), of 105 spacing for the corn seeds. The specifications of the conductor tubes used are shown in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Effect of different conductor tubes on the longitudinal distribution of corn seeds

Carpes

Alonço

Rossato

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe correct longitudinal distribution of seeds by the seeder machine is one of the features that most contributes to obtain an adequate plant stand and good crop yield. The objective of this study was to evaluate the longitudinal distribution of corn seeds by seed conductor tube types, combined with a horizontal perforated disc and a pneumatic meter, altering the seeding density rate. The experiment was conducted in a laboratory using a seed meter test bench. Treatments were a combination of two seed meters, six conductor tubes and four peripheral speeds for the meter disc, corresponding to densities of 60, 70, 80 and 90 thousand corn seeds per hectare and were organized in a three-factor scheme with four repetitions. By increasing the seeding rate into the same ground speed, there was a reduction in the percentage of acceptable spacing, this effect being more pronounced when conductor tubes with a small diameter and straight profile were used.

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Section: Methodsmentioning

confidence: 99%

Effect of different conductor tubes on the longitudinal distribution of corn seeds

Carpes

Alonço

Rossato

et al. 2017

Rev. bras. eng. agríc. ambient.

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Distribuição Longitudinal De Sementes De Soja Com Diferentes Métodos De Tratamento Fitossanitário Por Um Dosador De Disco Alveolar Horizontal

Carpes

Alonço

Moreira

et al. 2018

NAT

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A expressão do potencial genético da cultura da soja, possui relação direta com a qualidade da operação de semeadura, bem como, a utilização de sementes de elevado vigor e qualidade sanitária. O tratamento fitossanitário de sementes, é uma alternativa utilizada com a finalidade de proteger as sementes e plântulas nos estádios iniciais de desenvolvimento da cultura contra a ação de patógenos causadores de danos. Deste modo, objetivou-se avaliar diferentes métodos e produtos utilizados para o tratamento fitossanitário de sementes de soja, observando o seu efeito no desempenho de um dosador de disco alveolar horizontal. Os fatores observados foram os diferentes métodos de tratamento fitossanitário de sementes em quatro níveis, tratamento em tambor rotativo, adição de polímeros em tratamento industrial, tratamento industrial com adição de grafite e sementes sem adição de produto (testemunha). O segundo fator, foram as diferentes densidades de semeadura em quatro níveis (12, 14, 16, 18 sem m-1). As variáveis analisadas foram os espaçamentos entre sementes, aceitáveis, múltiplos, falhos e precisão. Após a análise e interpretação dos dados concluiu-se que, tanto o lubrificante sólido grafite como também os polímeros de recobrimento, podem ser utilizados sem que ocorra redução da qualidade de distribuição longitudinal de sementes com tratamento fitossanitário.Palavras-chave: densidade de semeadura, dosador de precisão, polímeros adesivos. LONGITUDINAL DISTRIBUTION OF SOYBEAN SEEDS WITH DIFFERENT METHODS OF PHYTOSANITARY TREATMENT BY A HORIZONTAL PERFORATED DISC METER ABSTRACT:The expression of the genetic potential of the soybean crop is directly related to the quality of the sowing operation, as well as the use of high vigor seeds and sanitary quality. Phytosanitary treatment of seeds is an alternative used to protect seeds and seedlings in the early stages of development of the crop against the action of pathogens causing damage. In this way, the objective was to evaluate different methods and products used for the phytosanitary treatment of soybean seeds, observing its effect on the performance of a horizontal disk metering. The factors observed were the different methods of phytosanitary treatment of seeds at four levels, rotary drum treatment, addition of polymers in industrial treatment, industrial treatment with addition of graphite and seeds without addition of product (control). The second factor was the different sowing densities at four levels (12, 14, 16, 18 without m-1). The analyzed variables were seed spacings, acceptable, multiple, fail and precision. After the analysis and interpretation of the data, it was concluded that both the graphite solid lubricant and the coating polymers can be used without reducing the quality of the longitudinal distribution of seeds with phytosanitary treatment.Keywords: seeding density, metering precision, adhesive polymers.

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The Assistat Software Version 7.7 and its use in the analysis of experimental data

Silva¹,

Azevedo²

2016

Afr. J. Agric. Res.

573

152

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Statistical programs are essential tools for those who deal with scientific research and need to analyze experimental data. In agriculture, there are often uncontrolled factors, which determine the necessity of statistical analyses of the data. The Assistat software version 7.7 is one of these tools and this study aimed to demonstrate its functionality and efficiency in the analyses of experimental data of agricultural research and evaluate its acceptance. In order to exemplify its utilization, data of agricultural experiments were analyzed using the models of analysis of variance for randomized block and factorial experiments. In addition, the regression was used in the analysis of variance for quantitative treatments. It was concluded that the software was used in many papers published in journals and that it is functional and efficient in the analysis of experimental data of agricultural research.

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Tamanho amostral para ensaios de mecanismos dosadores de sementes de milho em esteira carpetada

Cited by 3 publications

References 10 publications

Effect of different conductor tubes on the longitudinal distribution of corn seeds

Effect of different conductor tubes on the longitudinal distribution of corn seeds

Distribuição Longitudinal De Sementes De Soja Com Diferentes Métodos De Tratamento Fitossanitário Por Um Dosador De Disco Alveolar Horizontal

The Assistat Software Version 7.7 and its use in the analysis of experimental data

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