Distribuição radicular do maracujazeiro sob diferentes doses de potássio aplicadas por fertirrigação

Sousa, V. F. de; Folegatti, Marcos Vinícius; Filho, M. A. Coelho; Frizzone, José Antônio

doi:10.1590/s1415-43662002000100010

Cited by 19 publications

(18 citation statements)

References 6 publications

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“…The area between plants in the rows did not receive topdressing fertilization. Therefore, this result most likely occurred because of the higher fertility in the space between rows (Sousa et al, 2002).…”

Section: Resultsmentioning

confidence: 94%

“…Roots had lower concentrations in the layers below 40 cm, showing a parallel with nutrient concentrations (P, K, and Ca) ( Table 1 (1) Means followed by equal letters, in the columns, do not differ, by Tukey's test, at 5% probability. root systems can also be observed for other species, such as passion fruit (Sousa et al, 2002;Lucas et al, 2012) and orange rootstocks (Zaccheo et al, 2012). Although root development in coffee is mainly related to the genetic characteristics of the plant (Martins et al, 2013), other factors may also interfere in the spatial distribution, such as the propagation form, seedling stage, and amount of water in the soil (Franco & Inforzato, 1946).…”

Section: Resultsmentioning

confidence: 99%

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Root system distribution and yield of 'Conilon' coffee propagated by seeds or cuttings

Partelli

Covre

Oliveira

et al. 2014

Pesq. agropec. bras.

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-The objective of this work was to evaluate the root system distribution and the yield of 'Conilon' coffee (Coffea canephora) propagated by seeds or cuttings. The experiment was carried out with 2x1 m spacing, in an Oxisol with sandy clay loam texture. A randomized complete block design was used, following a 2x9x6 factorial arrangement, with two propagation methods (seeds and cuttings), nine sampling spacings (0.15, 0.30, 0.45, 0.60, 0.75, and 0.90 m between rows, and 0.15, 0.30, and 0.45 between plants within rows), six soil depths (0.10-0.20, 0.20-0.30, 0.30-0.40, 0.40-0.50, and 0.50-0.60 m), and six replicates. Soil cores (27 cm 3 ) with roots were taken from 12 experimental units, 146 months after planting. The surface area of the root system and root diameter, length, and volume were assessed for 13 years and, then, correlated with grain yield. The highest fine root concentration occurred at the superficial soil layers. The variables used to characterize the root system did not differ between propagation methods. Moreover, no differences were observed for net photosynthetic CO 2 assimilation rate, stomatal conductance, internal CO 2 concentrations, and instantaneous water-use efficiency in the leaves. Cutting-propagated plants were more productive than seed-propagated ones.Index terms: Coffea canephora, root diameter, root length, root volume, vegetative propagation. Distribuição do sistema radicular e produtividade do café 'Conilon' propagado por sementes ou estaquiaResumo -O objetivo deste trabalho foi avaliar a produtividade e a distribuição do sistema radicular do café 'Conilon' (Coffea canephora) propagado por sementes ou estaquia. O experimento foi realizado no espaçamento 2x1 m, em Latossolo com textura franco-argilo-arenosa. Utilizou-se o delineamento experimental de blocos ao acaso, em arranjo fatorial 2x9x6, com dois métodos de propagação (semente e estaca), nove espaçamentos (0,15, 0,30, 0,45, 0,60, 0,75 e 0,90 m, nas entrelinhas, e 0,15, 0,30 e 0,45 entre plantas), seis profundidades (0,20, 0,30, 0,40, 0,,50 e 0,50-0,60 m) e seis repetições. Foram retirados monólitos (27 cm 3 ) de solo com raízes de 12 unidades experimentais, 146 meses após o plantio. A área superficial do sistema radicular bem como o diâmetro, o comprimento e o volume das raízes foram avaliados por 13 anos e correlacionados à produtividade de grãos. A maior concentração de raízes mais finas ocorreu nas camadas superficiais do solo. As variáveis utilizadas para caracterizar o sistema radicular não diferiram entre os métodos de propagação. Além disso, não se observaram diferenças quanto à taxa de assimilação fotossintética líquida de CO 2 , nem quanto à condutância estomática, às concentrações internas de CO 2 e à eficiência do uso da água nas folhas. Plantas propagadas por estaquia foram mais produtivas do que as propagadas por sementes.Termos para indexação: Coffea canephora, diâmetro de raízes, comprimento de raízes, volume de raízes, propagação vegetativa.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Root system distribution and yield of 'Conilon' coffee propagated by seeds or cuttings

Partelli

Covre

Oliveira

et al. 2014

Pesq. agropec. bras.

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“…Studies on root distribution and depth are a source of information for the improvement of culture techniques, such as planting spacing, soil management and fertilization (Castle, Tucker, Krezdorn, & Youtsey, 1989). Knowledge regarding root density and depth allows the distribution of fertilizers at suitable locations, reducing losses and increasing the efficiency of use by the plants (Sousa, Folegatti, Coelho Filho, & Frizzone, 2002). Coelho et al (2001) reiterate that knowledge regarding root distribution is also an important tool with respect to irrigation projects, as the amount of water applied must maintain the soil near field capacity at the effective root depth.…”

Section: Introductionmentioning

confidence: 99%

<b>Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts

et al. 2016

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ABSTRACT. This study aimed to evaluate the effects of fertigation with humic substances, with and without the addition of plant extracts, on the root system of the 'BRS Princesa' banana cultivar. The banana crop was cultivated at a spacing of 2.0 x 2.5 m and fertigated using a drip system in a dystrocohesive Yellow Latosol. The experimental design was randomized blocks, in a split-split-plot scheme with five replicates, for the following factors: humic substance doses and presence of a plant extract formulation. The treatments consisted of five doses of humic substances, based on a reference dose of 14.14 L ha , in the presence and absence of plant extract. The variable root length (cm) was subjected to variance analyses to evaluate the effect of the humic substances, either isolated or in interaction with plant extract and soil depth. The use of the plant extract increased the effect of the humic substance on root length but overshadowed its effect for the different doses of humic substance. Root length was not sensitive to increasing humic substance dose with plant extract for doses of up to 42.42 L ha -1 at 0 -0.40 m depth.

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“…Poucos foram os trabalhos realizados para se estudar o sistema radicial do maracujazeiro, que é do tipo pivotante, pouco profundo e concentrado próximo ao caule, com maior volume de raízes, 60 a 80%, concentrado entre 0,30 e 0,45 m de profundidade e num raio de 0,60 m a partir do caule (Sousa et al, 2002), corroborando com os resultados apresentados por Tecchio et al (2005) em que a profundidade efetiva se estendia até 40 cm de profundidade.…”

Section: Introductionunclassified

Sistema Radicial Do Maracujazeiro Irrigado Submetido a Diferentes Níveis De Potássio

Freitas

Costa

Bezerra

et al. 2009

RSA

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. Foram avaliados a distribuição e o comprimento do sistema radicial no perfil do solo. Em todos os níveis de potássio a cultura apresentou um sistema radicial superficial, de modo que 80% das raízes concentraram-se até 0,40 m de profundidade. Contudo, a profundidade efetiva não variou com os tratamentos. Ocorreu uma interação positiva entre o aumento das doses de potássio e o desenvolvimento radicial do maracujazeiro, tendo as raízes se distribuído horizontalmente até um raio de 1,5 m a partir do caule da planta. Assim, esta é a faixa mais adequada para a instalação de sensores de monitoramento da irrigação e fertirrigação.Palavras-chave: Passiflora edulis; profundidade efetiva; SIARCS. ABSTRACTThe spatial distribution of the root system of passion fruit subjected to potassium levels of 150, 300, 450, 600 kg of K 2 O ha -1 and a control plot all drip irrigated was evaluated in the Vale do Curu -Ceará, in a "Neossolo Fluvico" type of soil. The root system was evaluated 420 days after the transplanting. Digital images were taken in a soil profile and the software SIARCS ® applied to analyze them. The distribution and length of the root system were evaluated in the soil profile. In all the potassium levels the crop presented a superficial root system, in way that 80% of the roots concentrated up to 0.40 m in depth. There was a positive interaction relation between the increasing level of potassium applied and the development of roots in the plant, although the effective root depth was not affected by the level of potassium applied. It was found the roots are distributed horizontally until a radius of 1.5 m from the plant's stem. That distance is thus recommended for installation of moisture sensors when applied to monitor irrigation and fertigation.

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Distribuição radicular do maracujazeiro sob diferentes doses de potássio aplicadas por fertirrigação

Cited by 19 publications

References 6 publications

Root system distribution and yield of 'Conilon' coffee propagated by seeds or cuttings

Root system distribution and yield of 'Conilon' coffee propagated by seeds or cuttings

<b>Roots of ‘BRS Princesa’ banana fertigated with humic substances and saponin-based plant extracts

Sistema Radicial Do Maracujazeiro Irrigado Submetido a Diferentes Níveis De Potássio

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