Diferentes Dosadores De Sementes E Velocidades De Deslocamento Na Semeadura Do Milho Em Plantio Direto

Bottega, Eduardo Leonel; Vian, Thiago; Guerra, Naiara; Neto, Antônio Mendes de Oliveira

doi:10.12661/pap.2017.014

Cited by 12 publications

(26 citation statements)

References 9 publications

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“…Slower sowing forward speeds favored higher regularity. These data corroborate with Bottega et al (2018), who reported that the seed metering with alveolar horizontal disc presented a higher average of failed plants when sowing corn. The same was observed for the highest sowing forward speed (8 km h −1 ), as the interaction between metering mechanisms and sowing forward speeds did not show significant differences (Table 3).…”

Section: Resultssupporting

confidence: 91%

“…Sowing forward speeds from 3 to 7 km h −1 (Table 3) presented acceptable values of normal spacing, close to 90%. However, a reduction in the number of normal spacings was observed when working above this limit, which agrees with Bottega et al (2018), who used pneumatic seed metering in corn sowing and observed that the most appropriate plant distribution was performed at speeds of 4 and 6 km h −1 . Similarly, Alonço et al (2015) evaluated different pneumatic metering mechanisms and sowing forward speeds (5.0, 7.5, and 10 km h −1 ) and found that an increase in speed significantly influenced the acceptable spacing index, going from 80.47 to 70.53%, on average, which is the same effect found for failed spacings, with means of 5.12, 7.47, and 11.24% for the mentioned speeds.…”

Section: Resultssupporting

confidence: 87%

“…The pneumatic mechanism in seeders favors the highest number of plants per meter, which is related to the lower numerical value of failure plants in the pneumatic metering mechanism. According to Bottega et al (2018), it can happen through the seed selection and individualization system, which has fewer mechanical components, by the negative pressure. This pneumatic metering system leads to less damage to seeds when compared to the mechanical system with horizontal discs.…”

Section: Resultsmentioning

confidence: 99%

“…The other variables did not show a correlation with each other. The increased stand, decreasing the number of failed plants and increasing the number of normal spacings, is explained by Bottega et al (2018), who reported damage to seeds by metering mechanisms. Also, according to Bottega et al (2014a), the use of higher forward speeds may compromise sowing quality because an increased forward speed leads to a proportional increase in the rotation speed of metering discs, reducing the time available to fill the holes with seeds.…”

Section: Resultsmentioning

confidence: 99%

“…The use of seeders with a precision metering device that places seeds at a pre-established sowing density for the crop (Dias et al, 2014) may be an alternative to improve crop yield. Bottega et al (2018) evaluated the performance of seeders equipped with perforated horizontal disc and pneumatic system at three forward speeds (4, 6, and 8 km h −1 ) in corn crop in a Distroferric Red Latosol under no-tillage system. They found that the use of the pneumatic metering mechanism resulted in better stand formation, reducing failed and double spacings, while the increase in the forward speed caused failures in the longitudinal seed distribution, increasing the occurrence of failed and double spacings.…”

Section: Introductionmentioning

confidence: 99%

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Seed Metering Mechanisms and Tractor-Seeder Forward Speed on Corn Agronomic Components

2020

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Seed metering system and tractor-seeder forward speed are factors that affect sowing. Therefore, this study aimed to evaluate sowing and agronomic components of corn as a function of seed metering mechanism and tractor-seeder forward speed, in addition to evaluating the yield data obtained from a harvester with a yield monitor. The soil of the area is classified as Distroferric Red Latosol. The experiment was set up in the second crop season of 2018 and treatments consisted of two seed metering mechanisms (M) (pneumatic and mechanical), and tractor-seeder forward speeds (S) (3, 5, 7, and 9 km h −1 ). The pneumatic system promoted the best longitudinal distribution, with values above 90%, and the increased sowing forward speed reduced normal spacings and increased failure. The interaction M × S indicated that pneumatic seeder promotes the best stand at the highest forward speed, normal spacing, and less failure. The yield data showed less variation with increasing forward speed, and the best result was observed for the mechanical seeder at 5 km h −1 when these data are grouped into yield classes.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Seed Metering Mechanisms and Tractor-Seeder Forward Speed on Corn Agronomic Components

2020

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Quality of sunflower seeds in function of thickness classification and sowing under speed variation of the seeder-fertilizer

et al. 2022

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The objective was to evaluate the quality of sunflower seeds classified according to their thickness and passed through the seeder-fertilizer dosing system under variation of the travel speed. A lot of M734 was classified by thickness passing the seeds through a set of oblong-hole sieves and two thicknesses were selected. A portion of the seeds with only the commercial classification was also reserved, named as non-classified. The biometric evaluation was done and the sowing was carried out at 5.0, 6.5, 8.0, 9.5 and 11.0 km h -1 . The quality of the seeds was evaluated through: germination and first germination count, average time and percentage of emergence in sand, accelerated aging and tetrazolium test. The classification by thickness reduce the coefficient of variation of the length, width, thickness, and mass but seeds classification does not affect seed vigor and viability after sowing under speed variation. In the higher studied speed, the passage of seeds through the dosing mechanism reduces germination. The vigor is affected at 6.5 km h -1 speed by the accelerated aging test. According to the emergence in sand and tetrazolium test, speed variation does not affect the vigor and viability of sunflower seeds.

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Weed Interference in the Establishment of Urochloa ruziziensis

et al. 2019

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This research aimed to study weed interference relationship on morphogenesis, yield, and greenhouse gas production potential of Urochloa ruziziensis under pasture renovation conditions. The experimental design was a randomized block design with four replications. Treatments consisted of seven coexistence periods: 0, 15, 30, 45, 60, 75, and 90 days after emergence (DAE). The following morphological parameters were analyzed: number of tillers, number of leaves, photosynthetically active leaf blade biomass, fresh stem biomass, dead material biomass, and total dry biomass. In vitro analyses of methane (CH4) and carbon dioxide (CO2) production were also carried out. The results were submitted to analysis of variance by the F-test, and the test of means was carried out by the Scott-Knott test at 5%. Biomass, CH4, and CO2 production of U. ruziziensis were modified with only 15 days of weed coexistence, with an effect even higher from 45 DAE. Therefore, weeds interfere with all morphological parameters, yield, and greenhouse gas production in the pasture establishment with the forage grass U. ruziziensis.

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Diferentes Dosadores De Sementes E Velocidades De Deslocamento Na Semeadura Do Milho Em Plantio Direto

Cited by 12 publications

References 9 publications

Seed Metering Mechanisms and Tractor-Seeder Forward Speed on Corn Agronomic Components

Seed Metering Mechanisms and Tractor-Seeder Forward Speed on Corn Agronomic Components

Quality of sunflower seeds in function of thickness classification and sowing under speed variation of the seeder-fertilizer

Weed Interference in the Establishment of Urochloa ruziziensis

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