Estudo comparativo do sistema radicular dos cafeeiros bourbon amarelo e mundo nôvo

Inforzato, Romeu; Reis, A. Junqueira

doi:10.1590/s0006-87051963000100067

Cited by 9 publications

(2 citation statements)

References 1 publication

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“…É importante destacar isto, pois compreender a espacialização radicular permite alcançar o aproveitamento máximo dos recursos edáficos disponíveis para as culturas (Franco & Inforzato, 1946;Lima et al, 2012). Entretanto, esses processos ocorrem de forma simultânea e podem provocar grandes modificações na distribuição do espaço poroso, como confirmado por diferentes autores (Franco & Inforzato, 1946;Inforzato & Reis, 1963;Motta et al, 2006). …”

Section: Resultsunclassified

Distribuição espacial das raízes de cafeeiro e dos poros de dois Latossolos sob manejo conservacionista

Carducci

Oliveira²,

Lima³

et al. 2014

Rev. bras. eng. agríc. ambient.

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R E S U M OO objetivo deste trabalho foi avaliar o efeito do sistema de manejo que emprega práticas de conservação do solo na distribuição do sistema radicular de cafeeiros e na estrutura de dois Latossolos após seis anos de implantação da lavoura na região do Alto São Francisco, MG. Foram abertas três trincheiras aleatórias e longitudinais à linha de plantio (0,70 x 1,50 m) em um Latossolo gibbsítico e em um Latossolo caulinítico ambos sob sistema de manejo do solo que emprega práticas conservacionistas. A avaliação do sistema radicular foi feita pelo método do perfil cultural e análise digital de imagens 2D, com posterior confecção de mapas de superfície das variáveis radiculares analisadas por meio da krigagem. Amostras de solo com estrutura preservada foram coletadas para quantificar a distribuição do diâmetro de poros 3D obtida por tomografia computada de raios-X. As raízes e poros foram classificados em: 1, >1 e ≤ 3 e > 3 mm de diâmetro. O sistema radicular dos cafeeiros de ambos os solos em estudo mesmo sobre o mesmo sistema de manejo apresentaram boa ramificação na direção horizontal e vertical. A maior concentração de raízes ocorreu na profundidade de 0,20-0,34 m no Latossolo caulinítico. No Latossolo gibbsítico, a distribuição radicular foi uniformizada especialmente na direção vertical do perfil do solo atingindo maiores profundidade. A maior ocorrência de raízes finas ocorreu no Latossolo gibsítico na profundidade de 0,80-0,94 m. Spatial distribution of coffee roots and pores of two Latosols under conservationist management A B S T R A C TThe aim of this study was to evaluate the effect of management system employing soil conservation practices in the coffee root system distribution and in the structure of two Latosols after six years in the crop establishment in Alto São Francisco Valley, MG. Three random trenches were made lengthwise along the row planting (0.70 x 1.50 m) in a gibbsitic Latosol and a kaolinitc Latosol both under soil management system employing soil conservationist practices. The root system evaluation was done by crop profile methods and 2D image analyze, with subsequent surface mapping of the root variables analyzed by kriging. Intact soil cores were sampled for pore diameter distribution analysed by X-ray CT scan. The roots and pores were classified by diameter:1, > 1 and ≤ 3 and > 3 mm. The coffee root system in both soils under study on the same management system showed good branching in horizontal and vertical direction. The highest root concentration occurred at 0.20-0.34 m depth in kaolinitic Latosol. In gibbsitic Latosol the root distribution was uniform, especially in the vertical soil profile reaching greater depths. The highest occurrence of fine roots in the gibbsitic Latosol occurred at 0.80-0.94 m depth.Palavras-chave: morfologia radicular análise de imagem tomografia computada de raios-X krigagem Coffea arabica L. Key words:roots morphology image analyze X-ray CT scan kriging Coffea arabica L. Revista Brasileira de Engenharia Agrícola e AmbientalCampina Grande, PB, ...

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Section: Resultsunclassified

Distribuição espacial das raízes de cafeeiro e dos poros de dois Latossolos sob manejo conservacionista

Carducci

Oliveira²,

Lima³

et al. 2014

Rev. bras. eng. agríc. ambient.

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“…The samples were removed from the probe, placed in trays, and roots were separated, washed and weighed. The weight of roots with diameter bellow 2 mm present in the soil volume sampled was then extrapolated to the volume of the cylinder estimated by the average crown diameter to the 30 cm depth, in which about 90% of the absorbent roots of the coffee tree are concentrated (Inforzato andJunqueira, 1963, Motta et al, 2006;Ronchi et al, 2015;Silva et al, 2020;Magalhães, 2021). After complete maturity, coffee cherries of each assayed plant were picked and weighed to determine their fresh matter weight.…”

Section: Fine Root Production Per Plant and Bean Production Per Plantmentioning

confidence: 99%

Kinetic Parameters of Nitrate Absorption by Adult Coffee Trees

Bohórquez

Martínez

Santos

2021

Front. Sustain. Food Syst.

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Nitrogen, the most demanded nutrient by coffee plants, has a rate of recovery from the soil of about 50%. Because of that high doses of nitrogenous fertilizers are used to reach high production, and consequently high amounts of N are lost to the environment. Knowing the kinetic parameters of nitrate (NO3-) absorption over the fruit development cycle is important as a mean of achieve more adjusted fertilizer doses and better recovery rates for the N applied as fertilizers. This study aimed determining the kinetic parameters of NO3- absorption in different development stages of fruits from adult coffee plants. The kinetic parameters Vmax and Km were determined in a low production year, at the pinhead (PH), rapid expansion (RE), grain filling (GF), and maturation (MT) stages. One month before each kinetics assay, lateral roots of eight plants were excavated and wrapped into non-woven fabrics grow cylinders filled in with vermiculite to produce absorbent roots. On the assay day, the roots were washed and immersed into a container with 1 L of 90 μmol L−1 NO3- solution. Sampling began one and a half hours after that, and was taken every hour over 7 h. Data on NO3- depletion were used to calculate the absorption kinetic parameters Vmax and Km. In a low production year the Vmax ranged from 0.14 to 0.72 μmol g−1 h−1 in a root fresh matter basis and Km from 6.47 to 50.31 μmol L−1. The Vmax values were highest at the PH and MT stages; the lowest absorption rate was recorded at GF and Km was lowest at RE. As at the RE stage of fruits Vmax shows a positive correlation with grain production, adequate nitrogen availability must be ensured before this phase to not to affect coming coffee production.

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The Distribution and Effectiveness of the Roots of Tree Crops

Atkinson

1980

Horticultural Reviews

130

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Estudo comparativo do sistema radicular dos cafeeiros bourbon amarelo e mundo nôvo

Cited by 9 publications

References 1 publication

Distribuição espacial das raízes de cafeeiro e dos poros de dois Latossolos sob manejo conservacionista

Distribuição espacial das raízes de cafeeiro e dos poros de dois Latossolos sob manejo conservacionista

Kinetic Parameters of Nitrate Absorption by Adult Coffee Trees

The Distribution and Effectiveness of the Roots of Tree Crops

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