Sistema radicular e componentes produtivos do girassol em solo compactado

Scapinelli, Alex; Deina, Filipe Rafaeli; Valadão, Daniel Dias; Valadão, Franciele Caroline Assis; Pereira, Luciane Belmonte

doi:10.1590/1678-4499.286

Cited by 13 publications

(14 citation statements)

References 15 publications

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“…In spite of what is considered a physically ideal soil, that is, with approximately 50% porous space, the discrepancy between the two soil situations is evident. This characteristic, in turn, is similar to the density results obtained by Valadão et al (2015) and Scapinelli et al (2016), both performed on the same soil. As emphasized by Scapinelli et al (2016), these changes come from intrinsic characteristics of the soil worked with, such as the plasticity, humidity, the tractor used, type of tire and the inflation pressure, which directly interfere in the soil volume that reduces and the soil mass that increases in a given occupied zone.…”

Section: /9supporting

confidence: 88%

“…Revista Brasileira de Ciência do Solo, v.24, n.4, p.857-865, 2000 no interference from other factors, such as soil moisture. It is noteworthy that, in general, the values obtained are different from the values commonly found in the literature, however, they were similar to what Scapinelli et al (2016) found when working on the same soil with the sunflower crop. In the study developed by Freddi et al (2007), there was a reduction in corn yield from 1.65 MPa onwards.…”

Section: Literature Citedcontrasting

confidence: 61%

“…Pacheco et al (2015) concluded that the soil density from 1.4 Mg m -3 onwards is already reducing the growth of aerial part and root of crotalaria. Under the same soil conditions as this study, Scapinelli et al (2016) found that values above 0.733 MPa of soil resistance to penetration reduced sunflower productivity, whereas values below 0.264 m 3 m -3 of soil macroporosity reduced the root area index, trait considered as critical for the crop.…”

Section: Introductionsupporting

confidence: 57%

“…Iijima et al (2007) subjected the roots of corn, rice, peas, and cotton to conditions of soil physical stress due to drought, anaerobiosis and mechanical impedance, concluding that cotton is the species that shows the greatest roots development in compacted soil condition. Scapinelli et al (2016) concluded that soil compaction promotes aerenchyma formation in the sunflower roots, this being typical of soil with oxygen restriction, caused in this case by the soil compaction.…”

Section: Introductionmentioning

confidence: 90%

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Critical limits of the soil physical properties for cotton

Júnior

Fiorillio

Valadão

et al. 2020

Agraria

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The objective of this study was to establish the relation between the soil physical properties and the cotton crop development in order to determine the critical limits. For this, an experiment was performed in a randomized block design in a dystrophic Red Oxisol typical of a clayey texture. The treatments consisted of five compaction states as a function of the different passages numbers of an agricultural tractor, with C0: no additional traffic; C1: one tractor passage; C2: three tractor passages; C3: six tractor passages and C4: eleven tractor passages. The soil physical properties, root distribution in its layers, vegetative and reproductive characteristics, and root anatomy were all evaluated. Cotton crop has been shown to be sensitive to compacted soils. Compaction promoted the arrangement of the soil solid particles, and it was possible to establish that the productivity is reduced with values of 0.26 m 3 m-3 , 0.27 m 3 m-3 and 0.90 MPa of macroporosity, microporosity and soil resistance to penetration, respectively. Soil compaction causes changes in the root system, with a reduction in the explored volume and increased root diameter, reflecting a yield drop.

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Section: /9supporting

confidence: 88%

Section: Literature Citedcontrasting

confidence: 61%

Section: Introductionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 90%

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Critical limits of the soil physical properties for cotton

Júnior

Fiorillio

Valadão

et al. 2020

Agraria

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“…Em um estudo com girassol, Scapinelli et al (2016) perceberam que a compactação do solo desencadeou reflexos no desenvolvimento vegetativo da cultura, diminuindo a altura das plantas. Iijima e Kato (2007), em um estudo sobre o crescimento radicular sob anaerobiose, restrição hídrica e mecânica de quatro culturas agrícolas, perceberam que as raízes do algodão mostraram elongação radicular mais estável que as outras culturas.…”

Section: Resultsunclassified

Crescimento Inicial De Algodão Cultivado Em Plintossolo Pétrico Concrecionário

Nikkel

Lima²

2020

EnergAgric

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CRESCIMENTO INICIAL DE ALGODÃO CULTIVADO EM PLINTOSSOLO PÉTRICO CONCRECIONÁRIO* MARCIO NIKKEL1, SAULO DE OLIVEIRA LIMA2 * Parte da Tese de Doutorado do primeiro autor. 1 Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Gurupi, Rua Badejós, Lote 7, Chácaras 69/72, Zona Rural, CEP 77402-970, Caixa Postal 66, Gurupi, Tocantins, Brasil, markel.26@hotmail.com. 2 Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Gurupi, Rua Badejós, Lote 7, Chácaras 69/72, Zona Rural, CEP 77402-970, Caixa Postal 66, Gurupi, Tocantins, Brasil, saulolima@uft.edu.br. RESUMO: O centro-norte do Brasil é uma região com forte presença de solo concrecionário, que apesar de apresentar desvantagem do ponto de vista agronômico, não impede sua utilização na agricultura, pecuária ou silvicultura. Mediante a observação de estandes agrícolas com culturas neste tipo de solo, surgiu a hipótese de que concreções de petroplintita interferem negativamente. O objetivo do trabalho foi de verificar o crescimento e desenvolvimento de algodão (Gossypium hirsutum) cultivado em solo com a presença de nódulos de petroplintita e na ausência deles. Plintossolo Pétrico Concrecionário foi coletado na camada 0-0,20 m e parte do solo foi peneirado de modo que concreções maiores de 3,10 mm de diâmetro fossem retiradas, deixando assim dois tratamentos, solo com concreções e sem concreções petroplintita. O algodão cultivado em solo sem petroplintita teve maior crescimento aos 21 e 28 dias após a emergência (DAE), assim como maior taxa de crescimento absoluto. Médias de área foliar também foram maiores no algodão cultivado em solo sem petroplintita, 94,36 cm2, ao passo que plantas de algodão cultivadas em solo com petroplintita tiveram média de 46,80 cm2. Assim sendo, conclui-se que concreções de petroplintita interferem no desenvolvimento e crescimento do algodoeiro. Palavras-chave: concreções, petroplintita, culturas anuais, restrição radicular, manejo do solo. COTTON INITIAL GROWTH CULTIVATED IN CONCRETIONARY PETRIC PLINTHOSOL ABSTRACT: The central-north of Brazil is a region with strong presence of concretionary soil, which, despite presenting disadvantages from the agronomic point of view, do not prevent their use in agriculture, livestock or forestry. Due to the observation of agricultural stands with crops in this type of soil, is hypothesized that plinthite ironstones concretions in the soil interfere negatively. The objective was to verify the growth and development of cotton (Gossypium hirsutum) cultivated in soil with the presence of plinthite ironstones and in the absence of them. Concretionary Petric Plinthosol were collected in the 0-0,20 m layer and part of the soil was sieved so that concretions larger than 3.10 mm in diameter were removed, thus leaving two treatments, soil with and without plinthite ironstones. Cotton grown in soil without ironstones showed higher growth at 21 and 28 days after emergence (DAE) as well in the absolute growth rate. Means of leaf area were bigger on cotton cultivated soil without ironstone, 94,36 cm2, while cotton growth in soil with ironstone showed means 46,80 cm2. Therefore, it is concluded that plinthite ironstones concretions interfere in the development and growth of cotton crops. Keywords: concretions, plinthite ironstones, annual crops, root restriction, soil management.

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New challenges for sunflower ideotyping in changing environments and more ecological cropping systems

Debaeke

Casadebaig

Langlade

2021

OCL

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As a rainfed spring-sown crop, sunflower (Helianthus annuus L.) is increasingly exposed to negative impacts of climate change, especially to high temperatures and drought stress. Incremental, systemic and transformative adaptations have been suggested for reducing the crop vulnerability to these stressful conditions. In addition, innovative cropping systems based on low-input management, organic farming, soil and water conservation practices, intercropping, double-cropping, and/or agroforestry are undergoing marked in agriculture. Because of its plasticity and low-input requirements (nitrogen, water, pesticides), sunflower crop is likely to take part to these new agroecological systems. Aside from current production outputs (yield, oil and cake), ecosystem services (e.g. bee feeding, soil phytoremediation…), and non-food industrial uses are now expected externalities for the crop. The combination of climatic and societal contexts could deeply modify the characteristics of genotypes to be cultivated in the main production areas (either traditional or adoptive). After reviewing these changes, we identify how innovative cropping systems and new environments could modify the traits classically considered up to now, especially in relation to expected ecosystem services. Finally, we consider how research could provide methods to help identifying traits of interest and design ideotypes.

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Sistema radicular e componentes produtivos do girassol em solo compactado

Abstract: A. Scapinelli et al. Resumo:Objetivou-se neste trabalho verificar alterações morfológicas e anatômicas no sistema radicular do girassol, bem como nos seus atributos produtivos em função da compactação adicional provocada pelo

Cited by 13 publications

References 15 publications

Critical limits of the soil physical properties for cotton

Critical limits of the soil physical properties for cotton

Crescimento Inicial De Algodão Cultivado Em Plintossolo Pétrico Concrecionário

New challenges for sunflower ideotyping in changing environments and more ecological cropping systems

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