Quantificação de raízes metabolicamente ativas de cana-de-açúcar

Faroni, Carlos Eduardo; Trivelin, Paulo César Ocheuze

doi:10.1590/s0100-204x2006000600017

Cited by 26 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…the values of rld, dMd and root area in the 0-0.10 m layer (1.29 cm cm -3 , 0.68 mg cm -3 and 5.10 mm 2 cm -3 , respectively) were 77; 89 and 72 % times higher than the values for the same characteristics in the 10-40 cm layer, indicating a high root concentration in the surface layer. Faroni & trivelin (2006);costa et al, 2007;and luca et al (2008), and correlate well with the physical characteristics (table 2), ie. the values of rld and dMd are lowest at depths where soil bulk density and penetration resistance are highest, and the rld and dMd values highest at depths where macroporosity is highest.…”

Section: Macroporosity (Ma) and Microporosity (Mi)mentioning

confidence: 57%

Soil physical properties and sugarcane root growth in a red oxiso

Baquero

Ralisch

Medina

et al. 2012

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

SuMMarySugarcane, which involves the use of agricultural machinery in all crop stages, from soil preparation to harvest, is currently one of the most relevant crops for agribusiness in Brazil. the purpose of this study was to investigate soil physical properties and root growth in a eutroferric red oxisol (latossolo Vermelho eutroférrico) after different periods under sugarcane. the study was carried out in a cane plantation in rolândia, Paraná State, where treatments consisted of a number of cuts (1, 3, 8, 10 and 16), harvested as green and burned sugarcane, at which soil bulk density, macro and microporosity, penetration resistance, as well as root length, density and area were determined. results showed that sugarcane management practices lead to alterations in soil penetration resistance, bulk density and porosity, compared to native forest soil. these alterations in soil physical characteristics impede the full growth of the sugarcane root system beneath 10 cm, in all growing seasons analyzed. index terms: Saccharum spp., compaction, monoculture. A cana-de-açúcar é, na atualidade, uma reSuMo: PROPRIEDADES FÍSICAS DE SOLO E CRESCIMENTO RADICULAR DE CANA-DE-AÇÚCAR EM UM LATOSSOLO VERMELHO

show abstract

Section: Macroporosity (Ma) and Microporosity (Mi)mentioning

confidence: 57%

Soil physical properties and sugarcane root growth in a red oxiso

Baquero

Ralisch

Medina

et al. 2012

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

show abstract

“…O sistema radicular foi avaliado pelo método do monólito (Vasconcelos et al, 2003;Faroni & Trivelin, 2006). Os monólitos, com dimensão de 0,25x0,10x0,10 m para a largura, altura e comprimento, respectivamente, foram coletados em junho de 2010, logo após a colheita, em quatro trincheiras (blocos), nos diferentes sistemas de manejo.…”

Section: Methodsunclassified

“…As raízes foram separadas do solo por lavagem em água corrente, com uso de peneira de 2,0 mm (Vasconcelos et al, 2003;Faroni & Trivelin, 2006), e suas imagens foram digitalizadas em scanner de leitura ótica, com resolução de 400 dpi, para a análise da densidade radicular com o programa Siarcs (Jorge & Crestana, 1996). Os dados médios de cada sistema de manejo foram interpolados, o que permitiu a espacialização da densidade radicular na região entre duas soqueiras.…”

Section: Methodsunclassified

Compressibilidade do solo e sistema radicular da cana‑de‑açúcar em manejo com e sem controle de tráfego

Souza

Silva

et al. 2012

Pesq. agropec. bras.

View full text Add to dashboard Cite

de piloto automático. As amostras de solo foram coletadas em cilindros volumétricos, na soqueira e na entrelinha da cultura (linha de rodado), nas camadas de 0,00-0,10 e 0,20-0,30 m. Avaliou-se a densidade radicular por meio de imagens, obtidas da digitalização de raízes coletadas em monólitos de 0,25x0,10x0,10 m. O manejo sem controle de tráfego apresentou maior capacidade de suporte de carga do solo na linha de plantio, nas duas camadas de solo avaliadas, o que indicou maior compactação. Maior densidade radicular ocorreu no manejo com controle de tráfego com ajuste da bitola e piloto automático, que permitiu maior capacidade de suporte de carga na linha de rodado e preservou a qualidade estrutural na região da soqueira, com reflexo positivo sobre o desenvolvimento do sistema radicular da cana-de-açúcar.Termos para indexação: Saccharum, capacidade de suporte de carga, colheita mecanizada, estrutura do solo, pressão de preconsolidação. Soil compressibility and root system of sugarcane with and without controlled-traffic farmingAbstract -The objective of this work was to compare the load-carrying capacity of the soil in a mechanically harvested sugarcane area, without burning, in managements with and without controlled traffic farming. Controlled traffic was done adjusting the gauges of tractor and trailer, or adjusting the gauges and using autopilot. Soil samples were collected in volumetric cylinders in plant rows and inter-rows (wheel rows), from 0.00-0.10 and 0.20-0.30-m soil depths. Root density was measured by images, obtained by scanning the collected roots in 0.25x0.10x0.10-m monoliths. The management without controlled traffic showed a higher load-carrying capacity of the soil in the planting rows, in both soil layers, which indicates a higher compaction. Greater root density occurred in the management with controlled traffic with gauge adjustment and use of autopilot, which made possible a higher load-carrying capacity in wheel rows, and preserved structural quality in the plant rows, resulting in a greater root system development of sugarcane.

show abstract

“…The control treatments (without N) and 120 kg ha -1 of urea-N, with four replications each, were selected for the study of metabolically active roots, according to the method described by Faroni (2004) and Faroni & Trivelin (2006). The locations chosen for application of the urea solution enriched with 15 N and for sampling of the root system were the same as of the trenches opened for the comparative study of the root sampling methods, as previously described.…”

Section: Metabolically Active Rootsmentioning

confidence: 99%

“…The method of isotopic dilution with 15 N allows the evaluation of the root mass with active metabolism and its distribution in the soil (Faroni & Trivelin, 2006). The objective of this study was to compare two methods of root system evaluation (probe and monolith), as well as the root system distribution and metabolically active roots of sugar cane in terms of N rates applied in the furrow at planting.…”

Section: Introductionmentioning

confidence: 99%

Root system distribution of sugar cane as related to nitrogen fertilization, evaluated by two methods: monolith and probes

Otto

Trivelin

Franco

et al. 2009

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

SUMMARYFew studies on sugar cane have evaluated the root system of the crop, in spite of its importance. This is mainly due to the difficulty of evaluation and high variability of results. The objective of this study was to develop an evaluation method of the cane root system by means of probes so as to evaluate the mass, distribution and metabolically active roots related to N fertilization at planting. For this purpose, an experiment was conducted in an Arenic Kandiustults with medium texture in Jaboticabal/SP, in a randomized block design with four replications and four treatments: control (without N) and 40, 80 and 120 kg ha -1 of N applied in the form of urea in the planting furrow of the cane variety SP81 3250. One week before harvest, a urea-15 N solution was applied at the cane stalk base to detect active metabolism in the root system. Trenches of 1.5 m length and 0.6 m depth were opened between two sugar cane rows for root sampling by two methods: monoliths (0.3, 0.2 and 0.15 m wide, deep and long respectively) taken from the trench wall and by probe (internal diameter 0.055 m). For each method, 15 samples per plot were collected. The roots were separated from the soil in a sieve (2 mm mesh), oven-dried (at 65 °C) and the dry matter was measured. Root sampling by probes resulted in root mass that did not differ from the evaluation in monoliths, indicating that this evaluation method may be used for sugar cane root mass, although neither the root distribution in the soil profile nor the rhizome mass were efficiently evaluated, due to the small sample volume. Nitrogen fertilization at planting did not result in a greater root accumulation in the sugar cane plant, but caused changes in the distribution of the root system in the soil. The absence of N fertilization led to a better root distribution in the soil profile, with 50, 34 and 16 % in the 0-0.2, 0.2-0.4 and 0.4-0.6 m layers, respectively; in the fertilized treatments the roots were concentrated in the surface layer, with on average 70, 17 and 13 % for the same layers. The metabolically active roots were concentrated in the center of the cane stool, amounting to 40 % of the total root mass, regardless of N fertilization (application of 120 kg ha -1 N or without N).Index terms: active roots, root sampling methods. RESUMO: DISTRIBUIÇÃO DO SISTEMA RADICULAR DA CANA-DE-AÇÚCAR, EM FUNÇÃO DA ADUBAÇÃO NITROGENADA, AVALIADOS POR DOIS MÉTODOS: MONÓLITO E SONDAPoucos estudos com cana-de-açúcar avaliaram o sistema radicular da cultura, apesar de sua importância. Esse fato é devido, em grande parte, à dificuldade de avaliação e à elevada variabilidade dos resultados. Objetivou-se com este trabalho avaliar um método de avaliação do sistema radicular da cana, por meio de sondagem, a fim de avaliar a massa, a distribuição e as raízes metabolicamente ativas em função da adubação nitrogenada de plantio. Para isso, foi conduzido experimento em um Latossolo Vermelho distrófico típico textura média, em Jaboticabal/SP, no esquema de blocos ao acaso com quatro repetições...

show abstract

Quantificação de raízes metabolicamente ativas de cana-de-açúcar

Cited by 26 publications

References 8 publications

Soil physical properties and sugarcane root growth in a red oxiso

Soil physical properties and sugarcane root growth in a red oxiso

Compressibilidade do solo e sistema radicular da cana‑de‑açúcar em manejo com e sem controle de tráfego

Root system distribution of sugar cane as related to nitrogen fertilization, evaluated by two methods: monolith and probes

Contact Info

Product

Resources

About