Effect of Nitrogen and Potassium Rates on Early Development of Macaw Palm

Pimentel, Leonardo Duarte; Bruckner, Cláudio Horst; Martínez, Herminia; Motoike, Sérgio Yoshimitsu; Manfio, Cândida Elisa; Santos, Rafael Carlos dos

doi:10.1590/01000683rbcs20140352

Cited by 8 publications

(10 citation statements)

References 8 publications

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“…The species grow in the savannas and open forests of tropical America, which are distributed from Central America to southern South America. It is probably found naturally in almost all the Brazilian territory, especially across the Southeast and Central West regions (Pimentel et al, 2015;dos Reis, Pinto, da Assunção, & da Silva, 2017). This species has an annual flowering season in Brazil from September through February and with peak flowering from November through December (Berton, 2013), which coincides with the season of highest rainfall in the areas in which it grows (Colombo, Berton, Diaz, & Ferrari, 2017).…”

Section: Introductionmentioning

confidence: 99%

Morphological, Physiological and Nutritional Effects of Irrigation Frequency on Macaúba Palm Seedlings

Hernández¹,

Imbuzeiro²,

Pimentel³

et al. 2018

JAS

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The commercial nurseries of macaúba palm (Acrocomia aculeata) have experienced excessive seedling mortality, which is possibly due to the lack of information about the proper growing practices. The goal of this study was to investigate the response of macaúba seedlings to water stress using different irrigation frequencies during the early seedling stage. The experiment was carried out in a macaúba palm nursery located in João Pinheiro, Minas Gerais, Brazil. The treatments started 30 days after sowing. At 90 days after sowing, the morphological (number of leaves, stem diameter, shoot length, root weight and the fresh and dry matter content of leaves, stem and roots), physiological (allocation of photosynthates) and chemical (nutrient content in the shoot) characteristics were evaluated. The results indicated that shoot height and stem diameter became smaller as the frequency of irrigation was reduced. However, the accumulation of fresh biomass in leaves and stems, and the leaf and root dry biomass became higher under the same condition. When water stress was induced in younger seedlings, the allocation of photosynthates occured more proportionally across all organs of the plants. The highest accumulation of K, S and Fe in the shoot were observed in plants that were exposed to water stress. N accumulation was higher in the aerial part of the seedlings as the irrigation frequency increased. However, the opposite behavior was observed for P, which accumulation was lowest in the control treatments.

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Section: Introductionmentioning

confidence: 99%

Morphological, Physiological and Nutritional Effects of Irrigation Frequency on Macaúba Palm Seedlings

Hernández¹,

Imbuzeiro²,

Pimentel³

et al. 2018

JAS

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“…ex Mart. -has been used as a raw material in the production of biofuels due to its high content of oil in the fruit, production of various energy residues, besides being a native perennial plant found naturally in almost all the Brazilian territory (Pimentel et al, 2015, Evaristo et al, 2016. The oil of the macaúba mesocarp is rich in oleic acid, and is demanded by both the food and the agroenergy industry (Coimbra & Jorge, 2011).…”

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confidence: 99%

Genetic diversity of macaúba fruits from 35 municipalities of the state of Goiás, Brazil

Reis

Pinto

Assunção

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the genetic diversity of macaúba (Acrocomia aculeata) accessions from 35 municipalities of the state of Goiás, Brazil, in order to obtain information about the genetic variability and to provide subsidies for the commercial deployment of the culture in the Midwestern region of Brazil. The bunches were harvested with ripe fruits. The following were evaluated: fruit and almond lengths and diameters; the weights of fruits and almonds; the average number of almonds, as well as the oil contents in the almond and in the dehydrated fruit. The parameters that indicated significant contributions to the variability were fruit weight, fruit width, fruit length, and oil content in the almond.Index terms: Acrocomia aculeata, agroenergy, almond quality, biodiesel, divergence, oleaginous seed. Diversidade genética de frutos de macaúba provenientes de 35 municípios de GoiásResumo -O objetivo deste trabalho foi avaliar a diversidade genética de acessos de macaúba (Acrocomia aculeata) provenientes de 35 municípios de Goiás, a fim de obter informações sobre a variabilidade genética e fornecer subsídios para implantação comercial da cultura na região Centro-Oeste. Procedeu-se à colheita dos cachos com frutos maduros. Foram avaliados: os comprimentos e os diâmetros dos frutos e das amêndoas; os pesos dos frutos e das amêndoas; o número médio de amêndoas; bem como os teores de óleo na amêndoa e no fruto desidratado. Os parâmetros que indicaram contribuições significativas para a variabilidade foram peso do fruto, largura do fruto, comprimento do fruto e teor de óleo na amêndoa.Termos para indexação: Acrocomia aculeata, agroenergia, qualidade da amêndoa, biodiesel, divergência, semente oleaginosa.The search for viable alternatives for replacing fossil fuels by biodiesel is a growing concern, especially in relation to global climate change (Pimentel et al., 2016). The macaúba -Acrocomia aculeata (Jacq.) Lodd. ex Mart. -has been used as a raw material in the production of biofuels due to its high content of oil in the fruit, production of various energy residues, besides being a native perennial plant found naturally in almost all the Brazilian territory (Pimentel et al., 2015, Evaristo et al., 2016. The oil of the macaúba mesocarp is rich in oleic acid, and is demanded by both the food and the agroenergy industry (Coimbra & Jorge, 2011).Currently, a large part of macaúba cultivation is restricted to extractive activity, and the few plantations are not yet in full production, and others in some research centers (Oliveira et al., 2016). These research centers in Brazil have been evaluating the genetic potential of different genotypes through quantitative and qualitative analyses as well as physical and chemical analysis of macaúba fruits (Matsimbe et al., 2015).Thus, the macaúba is considered of great interest by the scientific community, especially for its oleaginous property, in relation to the possibility of obtaining genetically superior materials. This results in the identificatio...

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“…The N-RUE in E. dysenterica seedlings was responsive up to the highest evaluated rate (400 mg dm −3 N); however, the seedlings showed lower NUE under this condition, possibly suggesting a negative effect on the dry matter production of the species. Nevertheless, it has been reported that N redistribution in trees occurs seasonally [26], and a higher N requirement can begin after two years of cultivation [43]. The uptake and use efficiencies for P were affected by the gradual increase in the supply of N. This is important because soils with a high level of iron and aluminum oxides, such as Cerrado soils, preferentially present positive charges that are capable of adsorbing various anions, such as phosphate ions, making P less available to plants [12,44].…”

Section: Effect Of Nitrogen and Phosphorous Rates On Root Uptake And mentioning

confidence: 99%

Growth, Physiology and Nutrient Use Efficiency in Eugenia dysenterica DC under Varying Rates of Nitrogen and Phosphorus

Reis

Silva

Santana

et al. 2020

Plants

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The production of high-quality seedlings and their use in commercial planting reduce pressure on natural areas. Eugenia dysenterica DC is a native fruit tree from the Brazilian Cerrado, whose nutritional requirements are still unclear. This study aimed to evaluate the effects of nitrogen (N) and phosphorus (P) supplementation on the physiology, growth and nutrient uptake, and use efficiencies of E. dysenterica seedlings grown in glasshouse conditions. The following rates were used in separate experiments: 0, 50, 100, 200, and 400 mg dm−3 N and 0, 100, 200, 400, and 600 mg dm−3 P. The experiment was conducted in a randomized block with four replications. The lowest N rate (50 mg dm−3) increased the stomatal conductance (gS) and, consequently, resulted in the highest transpiration (E), electron transport (ETR), and photosynthetic (A) rates. Also, rates of 50 mg dm−3 and 100 mg dm−3 N increased the Root Uptake Efficiency (RUE) and plant Nutrient Use Efficiency (NUE) for macronutrients and the RUE for micronutrients, stimulating plant growth. Phosphorous fertilization resulted in the maximum values for photosynthesis, electron transport rate, total dry mass, and NUE at the 200 mg dm−3 rate. The results of this study suggest that fertilization with 50 mg dm−3 N and 200 mg dm−3 P is suitable for the development of E. dysenterica seedlings.

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Effect of Nitrogen and Potassium Rates on Early Development of Macaw Palm

Cited by 8 publications

References 8 publications

Morphological, Physiological and Nutritional Effects of Irrigation Frequency on Macaúba Palm Seedlings

Morphological, Physiological and Nutritional Effects of Irrigation Frequency on Macaúba Palm Seedlings

Genetic diversity of macaúba fruits from 35 municipalities of the state of Goiás, Brazil

Growth, Physiology and Nutrient Use Efficiency in Eugenia dysenterica DC under Varying Rates of Nitrogen and Phosphorus

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