Productivity and nutrition of fertigated açaí palms according to boron fertilization

Lindolfo, Marcelo Morita; Matos, Gilson Sergio Bastos de; Fernandes, Antônio Rodrigues

doi:10.1590/0100-29452020601

Cited by 7 publications

(7 citation statements)

References 15 publications

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“…Y Hydro-char = ∑ Y Hydro-char/Cellulose + Y Hydro-char/Lignin + Y Hydro-char/Hemi-Cellulose + Y Hydro-char/Proteins + Y Hydro-char/Lipids + Y Hydro-char/Fibers (1) The yield of hydro-char computed using Equation ( 1) is very close to the experimental value of 39.534% (wt. ), showing a deviation of 2.51%, if the yield of Y Hydro-char/Fibers is computed based on the decomposition of cellulose, lignin, and hemi-cellulose (Y Hydro-char/Fibers = 16.17%), and 5.68%, if the yield of Y Hydro-char/Fibers is computed based on the decomposition of fibers (Y Hydro-char/Fibers = 14.895%).…”

Section: Materials Balances Operating Conditions and Yields Of Reaction Products Influence Of Temperature On The Yields Of Reaction Produsupporting

confidence: 71%

“…The laboratory-scale cylindrical stirred tank stainless steel reactor is 1.0 L (Parr, USA, Model: 4577), with internal diameters of 9.525 cm and 15.748 cm and a weight of 7.257 kg. The reactor contains a mechanical agitation system with a stirrer motor of 1 4 hp, 1.81 Nm torque, and 02 impellers (ID = 5.08 cm) with 6 blades, a ceramic movable heater of 2800 W, a modular controller (Parr, Moline, IL, USA, Model: 4848), and 02 type J thermocouples inside a thermos well and operates at maximum conditions of 345 bar and 500 • C. The hydrothermal processing of dried Açaí seeds was carried out with hot compressed water at 200, 225, and 250 • C for 240 min, with a biomass-to-water ratio of 1:10. Initially, the solid moisture was determined, and the mass of water was computed based on the dried solid.…”

Section: Experimental Apparatus and Procedures In Laboratory Scalementioning

confidence: 99%

“…Açaí (Euterpe oleracea Mart.) is a palm native to the Brazilian Amazon [1]. It has an abundant occurrence in the Amazon estuary floodplains [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Process Analysis of Main Organic Compounds Dissolved in Aqueous Phase by Hydrothermal Processing of Açaí (Euterpe oleraceae, Mart.) Seeds: Influence of Process Temperature, Biomass-to-Water Ratio, and Production Scales

et al. 2021

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This work aims to systematically investigate the influence of process temperature, biomass-to-water ratio, and production scales (laboratory and pilot) on the chemical composition of aqueous and gaseous phases and mass production of chemicals by hydrothermal processing of Açaí (Euterpe Oleraceae, Mart.) seeds. The hydrothermal carbonization was carried out at 175, 200, 225, and 250 °C at 2 °C/min and a biomass-to-water ratio of 1:10; at 250 °C at 2 °C/min and biomass-to-water ratios of 1:10, 1:15, and 1:20 in technical scale; and at 200, 225, and 250 °C at 2 °C/min and a biomass-to-water ratio of 1:10 in laboratory scale. The elemental composition (C, H, N, S) in the solid phase was determined to compute the HHV. The chemical composition of the aqueous phase was determined by GC and HPLC and the volumetric composition of the gaseous phase using an infrared gas analyzer. For the experiments in the pilot test scale with a constant biomass-to-water ratio of 1:10, the yields of solid, liquid, and gaseous phases varied between 53.39 and 37.01% (wt.), 46.61 and 59.19% (wt.), and 0.00 and 3.80% (wt.), respectively. The yield of solids shows a smooth exponential decay with temperature, while that of liquid and gaseous phases showed a smooth growth. By varying the biomass-to-water ratios, the yields of solid, liquid, and gaseous reaction products varied between 53.39 and 32.09% (wt.), 46.61 and 67.28% (wt.), and 0.00 and 0.634% (wt.), respectively. The yield of solids decreased exponentially with increasing water-to-biomass ratio, and that of the liquid phase increased in a sigmoid fashion. For a constant biomass-to-water ratio, the concentrations of furfural and HMF decreased drastically with increasing temperature, reaching a minimum at 250 °C, while that of phenols increased. In addition, the concentrations of CH3COOH and total carboxylic acids increased, reaching a maximum concentration at 250 °C. For constant process temperature, the concentrations of aromatics varied smoothly with temperature. The concentrations of furfural, HMF, and catechol decreased with temperature, while that of phenols increased. The concentrations of CH3COOH and total carboxylic acids decreased exponentially with temperature. Finally, for the experiments with varying water-to-biomass ratios, the productions of chemicals (furfural, HMF, phenols, cathecol, and acetic acid) in the aqueous phase is highly dependent on the biomass-to-water ratio. For the experiments at the laboratory scale with a constant biomass-to-water ratio of 1:10, the yields of solids ranged between 55.9 and 51.1% (wt.), showing not only a linear decay with temperature but also a lower degradation grade. The chemical composition of main organic compounds (furfural, HMF, phenols, catechol, and acetic acid) dissolved in the aqueous phase in laboratory-scale study showed the same behavior as those obtained in the pilot-scale study.

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Section: Materials Balances Operating Conditions and Yields Of Reaction Products Influence Of Temperature On The Yields Of Reaction Produsupporting

confidence: 71%

Section: Experimental Apparatus and Procedures In Laboratory Scalementioning

confidence: 99%

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Process Analysis of Main Organic Compounds Dissolved in Aqueous Phase by Hydrothermal Processing of Açaí (Euterpe oleraceae, Mart.) Seeds: Influence of Process Temperature, Biomass-to-Water Ratio, and Production Scales

et al. 2021

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“…Com o crescimento do mercado, o açaí passou a ser consumido também nas grandes capitais brasileiras, assim como a exportação que passou a ser feita para Estados Unidos, Japão, China e alguns países da Europa (Silva 2002). Essa demanda nacional e internacional por suco de açaí tem levado a uma grande expansão do cultivo em áreas irrigadas (Lindolfo et al 2020).…”

Section: Introductionunclassified

Dispersão Espacial de Atributos Químicos do Solo de um Açaizeiro na Região Amazônica

Barros¹,

Silva²,

Maciel³

et al. 2022

Anu. Inst. Geociênc.

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ResumoA Amazônia tem despertado a atenção dos produtores no plantio de açaizeiros, muitos deles, buscam inovar técnicas de cultivo que possam auxiliar nas tomadas de decisões na agricultura, visando desenvolver sistemas de cultivo apropriados para aumentar a produtividade. Objetivo deste trabalho foi avaliar a variabilidade espacial dos atributos químicos do solo e sua interação com o cultivo do açaí (Euterpe oleracea Mart.), localizada na fazenda Fonte Nova no Município do Acará-PA. Os dados foram submetidos a estatísticas descritivas e teste de normalidade de Shapiro-Wilk. Para os elementos químicos do solo avaliou-se ainda a dependência espacial, geração modelos dos semivariogramas e mapas de krigagem. Por fim foi realizada uma matriz de correlação entre os atributos estudados. Os resultados mostraram que a maior parte das variáveis químicas do solo apresentou dependência espacial, indicando que o número de amostras coletadas e os pontos plotados foram suficientes para mapear área do plantio, por meio das técnicas geoestatísticas. Os modelos teóricos predominantes no estudo foram esférico, gaussiano e o exponencial. As variáveis apresentaram moderada correlação. Percebeu-se que os mapeamentos dos atributos do solo e do plantio foram importantes para identificação das áreas com diferentes níveis de fertilidades e as regiões com maiores potenciais produtivos.

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“…Recent years have been marked by the rising production and consumption of açaí palm products, due mainly to the way paved by the 'preto' variety in the domestic and international market following the recognition of its pulp as a functional food that is rich in anthocyanins, calories, lipids, carbohydrates, proteins, minerals, and fibers (Cedrim, Barros, & Nascimento, 2018). This increase in production has resulted from simultaneous movement for greater exploitation of native stands and expansion of planting areas (Lindolfo, Matos, Pereira, & Fernandes, 2020).…”

Section: Introductionmentioning

confidence: 99%

Morphoagronomic and molecular characterization of Euterpe oleracea accessions from eastern Brazilian Amazon

Rios

Mochiutti²,

Borges³

et al. 2021

Acta Sci. Biol. Sci.

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Açaí (Euterpe oleracea Mart.) - a common tropical palm has high social, economic, and environmental importance in the Amazon region. In the light of increasing exploration to obtain the fruit and heart of this palms, comprehensive studies are warranted for conservation and genetic improvement. Here, we characterized açaí accessions using phenological, morphological, and agronomic descriptors and random amplified polymorphic DNA (RAPD) molecular markers for joint selection of accessions with greater productivity. Hundred accessions were analyzed using 18 morphoagronomic descriptors and 13 RAPD markers. The spathe and inflorescence emission phases during flowering and fruiting showed seasonality. Based on the coefficient of variation and mean squared error, the accessions exhibited high variability in the tested morphoagronomic descriptors and were distributed into seven groups. Fruit, seed, and pulp weights were important descriptors for the distinction of accessions and identification of those with greater productivity. The accessions presented >85% similarity, and 85 accessions, distributed in nine subgroups, could not be differentiated using RAPD markers. There was no correlation between grouping based on morphometric descriptors and RAPD markers. Panicle weight was 3.9-9.0 kg in 15 accessions and 100-fruit pulp weight was 35-50 g in six accessions. Therefore, accessions with high productivity could be selected.

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Productivity and nutrition of fertigated açaí palms according to boron fertilization

Cited by 7 publications

References 15 publications

Process Analysis of Main Organic Compounds Dissolved in Aqueous Phase by Hydrothermal Processing of Açaí (Euterpe oleraceae, Mart.) Seeds: Influence of Process Temperature, Biomass-to-Water Ratio, and Production Scales

Process Analysis of Main Organic Compounds Dissolved in Aqueous Phase by Hydrothermal Processing of Açaí (Euterpe oleraceae, Mart.) Seeds: Influence of Process Temperature, Biomass-to-Water Ratio, and Production Scales

Dispersão Espacial de Atributos Químicos do Solo de um Açaizeiro na Região Amazônica

Morphoagronomic and molecular characterization of Euterpe oleracea accessions from eastern Brazilian Amazon

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