Desempenho e dimensionamento amostral para avaliação de uma semeadora-adubadora em plantio direto e convencional

Vale, W. G.; Garcia, Ricardo Ferreira; Thiébaut, José Tarcísio L; Amim, Reynaldo Tancredo; Tourino, Maria Cristina Cavalheiro

doi:10.4025/actasciagron.v30i4.5295

Cited by 6 publications

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“…Os valores de patinagem observados nâo estâo de acordó com o proposto por Balastreire (2005), que é de 4% para borracha ranhurada, e também nâo com o valor observado por Vale et al (2008), que é de 10,74%, trabalhando com o mesmo modelo de máquina semeadora. Fatores que podem ter contribuido para esses altos índices de patinagem e que, durante a semeadura, os depósitos de fertilizantes estavam vazios, faltando lastro para melhorar o contato rodado e solo.…”

Section: Resultados E Discussâounclassified

“…Já velocidades abaixo de 0,29 m s"' favorecem o preenchimento total dos furos do disco dosador, e somente podem ser problemáticas quando as sementes tiverem tamanhos muito menores que os furos do disco, com isso, os furos do disco dosador podem capturar duas ou mais sementes ocorrendo o surgimento de duplos no ato de semeaduraduas ou mais sementes depositadas com um espaço menor entre elas do que o espaço normal -essas plantas competirâo entre si e o seu crescimento, desenvolvimento e produçâo serâo afetados por essa razäo (MANTOVANI et al, 1999;VALE et al, 2008).…”

Section: Resultados E Discussâounclassified

“…Com o uso intenso de máquinas na cultura da cana-deacúcar, principal produto da regiáo, e a ocorrência de chuvas de grande intensidade no verlo verificam-se, com frequência, problemas pertinentes à conservaçâo do solo e da agua, resultando na desagregaçâo e exposiçâo do solo ao intemperismo (VALE et al, 2008).…”

Section: Introduçàounclassified

“…Avahando uma semeadoraadubadora de precisao. Vale et al (2008) observaram os valores de 10,74 e 7,18% de patinagem para o plantio convencional e plantio direto, respectivamente.…”

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Influência da velocidade de deslocamento no desempenho de uma semeadora-adubadora de precisão no Norte Fluminense

et al. 2011

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ABSTRACT. Influence of displacement speed in the performance of a precision no-till planter in northern Rio de Janeiro State. The objective of this work was to evaluate the influence of displacement speed in the performance of a no till planter. The tests were performed in the experimental area of the Universidade Estadual do Norte Fluminense Darcy Ribeiro, located in Campos dos Goytacazes, Rio de Janeiro State, Brazil. The experiment was carried out in a randomized block design, using two speeds of 2.5 and 4.4 km h -1 , with 16 replications. For sowing, the UENF 506-8 hybrid corn, with row spacing of 0.9 m and theoretical 11 cm spacing between seeds was used. When the displacement speed was intensified, there was an increase in planter wheel slippage, effective field capacity, planting depth, plate distribution mechanism speed and the occurrence of doubles. There was a decrease in the number of seeds per meter and exposed seeds with an increase in planter speed. The seeds that did not pass through the plate distribution mechanism reached a germination rate of 98%, while, both in speeds of 2.5 and 4.4 km h -1 they showed 95.3% germination, which represents a reduction of 2.7% due to mechanical damage caused by the planter plate distribution mechanism.

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“…Avahando uma semeadoraadubadora de precisao. Vale et al (2008) observaram os valores de 10,74 e 7,18% de patinagem para o plantio convencional e plantio direto, respectivamente.…”

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Influência da velocidade de deslocamento no desempenho de uma semeadora-adubadora de precisão no Norte Fluminense

et al. 2011

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“…Agríc. Ambiental, v.18, n.8, p. 873-878, 2014. versatile and resistant seeding machines (Vale et al, 2010), and are used for different crops and soils, with the function of opening the groove, removing not much soil and straw, with good penetration and acceptable depth control, adequately covering the seeds, factors that guarantee the success of the exploration (Vale et al, 2008). Therefore, for the success of no tillage system, tractor-seeder should work synergistically because the different quantities of straw on the surface provided by the system of crop-livestock integration can cause the straw accumulation and harm other mechanisms that affect the soil, that can directly affect the operating performance of the tractor, which is the proposal of this research.…”

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Energy demand in soybean seeding on maize straw intercropped with forage

Chioderoli

Silva²,

Furlani

et al. 2014

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe sustainability of no-tillage system is fully linked to the soil use and management, in order to use technologies that promote the accumulation of dry vegetation in the soil, but it may affect the performance of agricultural machinery. Therefore, the objective of this study was to evaluate in soybean seeding the operational performance of tractor-seeder on maize straws intercropped with Urochloas in different treatments. The study was conducted in a randomized block design in factorial scheme 2 x 4 + 1, with four replications, formed by two intercropped forage species and five cropping systems. The dry maize straw, Urochloas dry mass and total straw dry mass were determined in treatments to verify the operational performance of the machines. The results showed that the amount of straw produced by maize and Urochloas interferes with the slippage of the tractor's front wheels, i.e., areas with higher amount of straw promotes lower adherence of the wheel. Energy demand was not affected by amount of straw produced by the treatments, as well as fuel consumption and operational field capacity.Demanda energética na semeadura de soja sobre palha de milho consorciado com forrageiras R E S U M OA sustentabilidade do sistema plantio direto está ligada ao uso e ao manejo do solo com o propósito de utilizar tecnologias que promovam o acúmulo de massa seca vegetal no solo porém podem afetar o desempenho das máquinas agrícolas. O objetivo deste trabalho foi avaliar, na semeadura da soja, o desempenho operacional do conjunto trator-semeadora sobre palhadas de milho consorciado com Urochloas em diferentes tratamentos. A pesquisa foi instalada em blocos casualizados em esquema fatorial 2 x 4 + 1, com quatro repetições, formados pelo consórcio de duas espécies forrageiras em cinco sistemas de cultivo. A massa seca de palha do milho, massa seca de Urochloas e massa seca total de palha foi determinada nos tratamentos para verificar o desempenho operacional das máquinas. Os resultados demonstraram que a quantidade de palha produzida pelo consórcio de milho com Urochloas interfere na patinagem dos rodados dianteiros do trator, ou seja, áreas com maior quantidade de palha promovem menor aderência dos rodados. A demanda energética não é afetada pela quantidade de palha produzida pelos tratamentos tal como o consumo de combustível e a capacidade de campo operacional. Key words:no tillage system slippage of wheels crop-livestock integration Palavras-chave: sistema plantio direto patinagem dos rodados integração lavoura-pecuária Revista Brasileira de Engenharia Agrícola e Ambiental

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Progressão da semeadura de >i<Glycine max>/i< L. em regiões do Mato Grosso: uma contribuição ao estudo do planejamento de sistemas mecanizados

Junior¹

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Glycine max L. sowing progression in regions of Mato Grosso: a contribution to the study of mechanized systems planning Soybean sowing has been occurring early in the state of Mato Grosso, aiming to increase the second crop area. Sowing planning is important for soybean yield and losses may occur due to the anticipation of sowing under conditions not favorable for crop growth. In planning, the operational rhythm is estimated, using methodologies based on the estimation of the available time in which administrative issues such as working hours, working on Sundays and holidays and edaphoclimatic constraints that affect the number of working days are considered. Monitoring the evolution of soybean implementation and providing information on the start and end dates and the values of the sown area on a regional scale has contributed to decision making and has been officially carried out for years. Given the challenge for the planning of mechanized systems and the availability of historical series on the performance of the sowing operation in Mato Grosso, the objective of this work was to ascertain through the among of work required, the relationship between the sowing rate actually performed, with the planned intensity, ie the operational rhythm (RO). The methodology for estimating the intensity of sowing performed, called the sowing rate used data from historical series of the follow-up of the operation, and linear regressions were performed in 6 harvests in the middle north and southeast macroregions of Mato Grosso. To calculate the time available to perform the operation were collected climate data and characteristics of soil types. The calculation of the number of improper days (NDimp), those restrictive due to climate issues, met the criteria with the maximum rainfall on the previous day and on the day of sowing less than 10 mm and presence of soil moisture between 40 to 90% of the capacity water available (CAD). Sensitivity analysis of the effects of rainfall and soil water strip on NDimp was performed in both macroregions. The results indicated a sowing rate and RO values of 3.02 and 9.14% per day in the macroregions, that is, there was a discrepancy between the planning values with the RO estimation and those observed in both macroregions. Moreover, in the scenario with maximum allowable rainfall of 10 mm on the day and the previous day and soil water range of 20 to 70% of CAD, the lowest RO occurred in both macroregions. It was concluded that the sowing progression presents distinct intensities during the cultivation period, with high intensity in the central period of the crop and most of the area sowed in a short period. The seeding operation is carried out under inadequate soil moisture conditions.

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Desempenho e dimensionamento amostral para avaliação de uma semeadora-adubadora em plantio direto e convencional

Cited by 6 publications

References 0 publications

Influência da velocidade de deslocamento no desempenho de uma semeadora-adubadora de precisão no Norte Fluminense

Influência da velocidade de deslocamento no desempenho de uma semeadora-adubadora de precisão no Norte Fluminense

Energy demand in soybean seeding on maize straw intercropped with forage

Progressão da semeadura de >i<Glycine max>/i< L. em regiões do Mato Grosso: uma contribuição ao estudo do planejamento de sistemas mecanizados

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