Influência da densidade do solo infestado por nematoide no desenvolvimento inicial de cana-de-açúcar

Sousa, Carlos Antônio Ferreira de; Pedrosa, Elvira M. R.; Rolim, Mário M.; Filho, João Valdenor Pereira; Souza, Marcela A. L. M. de

doi:10.1590/s1415-43662014000500002

Cited by 4 publications

(3 citation statements)

References 17 publications

(21 reference statements)

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“…The IMA-2103 genotype indicated the best linear adjustment in relation to the others, with a coefficient of determination of 0.8497. Sousa, Pedrosa, Rolim, Filho and Souza (2014), when examining the initial development of sugarcane in soil compaction levels, observed that the effects of shoot fresh mass were not significant (p > 0.05). Therefore, the reduction of the plant fresh mass with the increment of the density can be explained in relation to the decrease in root length, thereby hindering the absorption of water and nutrients from the soil.…”

Section: Resultsmentioning

confidence: 94%

Morphological Characteristics of Safflower Seedlings Under Compaction Levels in a Clayey Latosol

Chang¹,

Secco²,

Marins³

et al. 2019

JAS

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This study aimed to evaluate the effect of soil compaction levels on initial development of safflower genotypes (Carthamus tinctorius). The experimental design was 2 × 2 × 6, composed of two sowing seasons (May and June 2017), two genotypes (IMA-2103 and IMA-4409) and six levels of soil density (1.0, 1.1, 1.2, 1.3, 1.4, and 1.5 g cm-3), with three replicates. After 30 days of planting, percentage of emergence, emergence speed index, mean time of emergence and mean speed of emergence were analyzed. Among the morphological characteristics, plant height, stem diameter, root length, shoot and root fresh mass, shoot dry mass and number of healthy and wilted leaves were evaluated. The compaction states did not significantly interfere in the emergence of the safflower seedlings that were sown in the uncompacted surface layer. As soil compaction increased, root length, shoot fresh mass, shoot dry mass and root fresh mass were reduced in both genotypes. Soil density considered critical to safflower root growth was 1.3 g cm-3. The IMA-4409 genotype, in relation to IMA-2103, was more tolerant to soil compaction levels.

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Section: Resultsmentioning

confidence: 94%

Morphological Characteristics of Safflower Seedlings Under Compaction Levels in a Clayey Latosol

Chang¹,

Secco²,

Marins³

et al. 2019

JAS

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“…Estudos que relacionam níveis de compactação do solo e comunidades de nematoides são escassos na literatura (Cardoso et al, 2012). No entanto, experimentos conduzidos por Sousa et al (2014) permitiram associar o aumento do grau de compactação do solo com a redução do número de fitonematoides. O mesmo ocorreu em estudos de relações entre a nematofauna e a resistência mecânica do solo à penetração de raízes em área de cultivo de cana-deaçúcar (Cardoso et al, 2012).…”

Section: Introductionunclassified

Densidade Populacional Do Nematoides-Das-Lesões-Radiculares Em Cana-De-Açúcar Em Função De Cultivares, Manejo Do Palhiço E Escarificação Do Solo

Barbosa

Asmus²

2019

Rev. Agric. Neotrop.

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A expansão do setor sucroalcooleiro suscitou preocupação quanto a questões que afetam a produtividade, tais como a presença de fitonematoides e as práticas de manejo cultural. O objetivo deste trabalho foi analisar a comunidade de nematoides do gênero Pratylenchus em cultivares de cana-de-açúcar plantados em solo submetido ou não à escarificação e ao aleiramento do palhiço residual da colheita. Foi conduzido experimento de campo em duas áreas, com e sem escarificação, nas quais foram plantadas 15 cultivares de cana-de-açúcar em subparcelas com e sem aleiramento do palhiço sobre as linhas de plantio. Anualmente, foram quantificados os nematoides do gênero Pratylenchus, no solo e nas raízes das plantas. Houve diferenças na densidade populacional do nematoide-das-lesões-radiculares em função do cultivar de cana-de-açúcar. O cultivar RB 92579 mostrou-se suscetível ao nematoide-das-lesões-radiculares. A não escarificação exerce limitação ao número de nematoides-das-lesões-radiculares, e a manutenção da palha sobre a superfície do solo em área total após a colheita de três safras não exerceu influência sobre a densidade populacional do nematoide-das-lesões-radiculares no solo ou nas raízes de diferentes cultivares de cana-de-açúcar. Após quatro anos de cultivo de cana-de-açúcar, a população de P. zeae prevaleceu sobre a de P. brachyurus.

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“…The traffic of heavy machinery, without taking into account the level of soil moisture, has, over successive cropping cycles, contributed to the process of soil compaction (Severiano et al, 2010;Souza et al, 2014). It is not possible to think of any form of sugar cane production that does not use highly technified agricultural mechanisation, from planting through to harvesting (Souza et al, 2012).…”

mentioning

confidence: 99%

The use of modelling to determine the limiting conditions for resuming soil loading by tractor in an area of sugar cane under reduced tillage

Araújo

Souza

Arcoverde

et al. 2022

Int J Innov Educ Res

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The marked growth of the sugar and alcohol sector has promoted an increase in the fleet of heavy agricultural vehicles to meet the demand for commodities; however, the intense traffic of machines in areas of insufficient soil moisture has resulted in compaction, compromising the productivity of the sugar cane. In order to determine the optimal conditions for resuming the use of tractors under a reduced tillage system, the bearing capacity was evaluated and stress distribution was modelled in a dystroferric Red Latosol cultivated with sugar cane. Soil sampling was carried out during the first ratoon crop at 120 days, using metallic cylinders installed at a depth of 0.05 m in the crop rows and 0.15 m between rows. The samples were submitted to the uniaxial compression test to determine the preconsolidation pressure of the soil. The reduced tillage gave the lowest bearing capacity at the soil surface (0.05 m), while the highest values were found at a depth of 0.15 m. The bearing capacity proved to be an efficient indicator for analysing the structural degradation of the soil by demonstrating the compressibility of the various layers and sampling positions resulting from reduced tillage and the impact of agricultural machines in the field. The prediction model for traction and soil stress distribution that was employed was able to predict the optimal performance of the tractor, and provide stress data that would allow a study of the limiting water content for the traffic of agricultural tyre tractors.

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Influência da densidade do solo infestado por nematoide no desenvolvimento inicial de cana-de-açúcar

Cited by 4 publications

References 17 publications

Morphological Characteristics of Safflower Seedlings Under Compaction Levels in a Clayey Latosol

Morphological Characteristics of Safflower Seedlings Under Compaction Levels in a Clayey Latosol

Densidade Populacional Do Nematoides-Das-Lesões-Radiculares Em Cana-De-Açúcar Em Função De Cultivares, Manejo Do Palhiço E Escarificação Do Solo

The use of modelling to determine the limiting conditions for resuming soil loading by tractor in an area of sugar cane under reduced tillage

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