Substrate, Lime, Phosphorus and Topdress Fertilization in Macaw Palm Seedling Production

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

doi:10.1590/0100-67622016000200006

Cited by 22 publications

(16 citation statements)

References 2 publications

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“…The higher LA displayed during the initial growth of macaw palm seedling under the low light environment and its maximum photochemical efficiency, contribute to maximizing the light capture. However, during the transition from the pre-nursery stage to nursery-growing plants, with higher biomass accumulation 22 , the increase in the LA was similar between plants grown under contrasting light conditions, resulting in insignificant differences in the SLA. Generally, in dicot trees, shading increases the leaf height and LA compared to plants grown under full sunlight conditions 8 , 10 .…”

Section: Discussionmentioning

confidence: 91%

“…The recommended initial seedling cultivation process consists of using pre-germinated seeds in two consecutive stages: the pre-nursery stage, which extends from pre-germination to the appearance of the first pair of lanceolate (split) leaves and the nursery stage that extends to the appearance of the second pair of pinnate (mature) leaves. Starting from this point when the seedlings are approximately 1 year old, field planting can begin 22 . Generally, after the formation of the first eophyll in the pre-nursery stage, a hardening procedure is empirically used to promote the robustness of seedlings and enhance their capacity to acclimate to excessive light, thereby preventing photoinhibitory stress in the nursery and hastening development in the field 23 .…”

Section: Introductionmentioning

confidence: 99%

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Acclimation responses of macaw palm seedlings to contrasting light environments

Dias

Siqueira-Silva²,

Souza³

et al. 2018

Sci Rep

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The photosynthetic adjustments of macaw palm (Acrocomia aculeata) were evaluated in 30-day-old seedlings exposed to high and low light environments, and sudden transference from low to high light and comparisons were made with the hardening protocol used in nurseries. Furthermore, we evaluated the responses to long-term exposure (265 days) to high and low light environments. Macaw palm seedlings exhibited an efficient mechanism that maximized light capture under scarce conditions, and dissipated excess energy to avoid damaging to the photosystem II under high light. The seedlings showed low saturation irradiance but no photoinhibition when exposed to excess light. When grown under low light intensities, seedlings presented higher photochemical efficiency and minimized the respiratory costs with positive carbon balance at lower irradiance than hardened seedlings did. The hardening procedure did not appear to be an advantageous method during seedling production. Long-term exposure to either low or high light did not cause significant leaf anatomical adjustments. However, the low light seedlings showed higher leaf area and chlorophyll content than those exposed to higher light intensity did, which enabled shaded seedlings to maximize the captured light. Furthermore, the high non-photochemical dissipation allowed rapid acclimation to excessive light exposure. These responses allow macaw palm cultivation and establishment in very different light environments.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Acclimation responses of macaw palm seedlings to contrasting light environments

Dias

Siqueira-Silva²,

Souza³

et al. 2018

Sci Rep

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“…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.)…”

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“…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.)…”

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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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“…Knowledge about the availability of light (shading) and about the type of substrate for the production of these seedlings is essential, since they play a prominent role in all stages of plant development in the nursery phase. In addition, they are factors that can be manipulated in order to unequivocally contribute to the improvement of the percentage, speed, and uniformity of emergence, providing more homogeneous seedlings, of good quality, fast growth and with good root system formation (Pimentel et al, 2016). Therefore, knowledge of substrates and shading is a critical step in the production of seedlings of any plant species.…”

Section: Introductionmentioning

confidence: 99%

Different substrates and protected environments for the initial development of Richeria grandis Vahl seedlings

Moura

Costa

Oliveira

et al. 2020

Agraria

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Due to the copious anthropization in Gallery Forests and the obligation to restore these spaces, together with the scarcity of information regarding a methodology for seedling emergence and production in a nursery, the objective of this research was to evaluate the impact of different substrates and levels of shading on seedling emergence and quality of the species Richeria grandis Vahl. The fruits, collected in 18 matrix trees in Gallery Forests, were benefited; the seeds were depulped and sown on the same day of collection. The experiment was conducted in a greenhouse, where three substrate compositions were used: S 1-70% of vermiculite and 30% carbonized rice husk; S 2-50% of bioplant ® , 35% of vermiculite and 15% carbonized rice husk; S 3-70% of subsoil land and 30% of tanned bovine manure. The substrates were placed in tubes with a capacity of 180 cm³ and maintained under three shading levels: 0%, 30% and 50%. The experimental design was completely randomized in a subdivided block design. All the evaluated characteristics were inferior in the 0% shading. Emergence, chlorophyll content, height and diameter of the root collar were greater under 30% and 50% shading levels, as well as in substrates S 1 and S 2. The substrate that most positively influenced R. grandis seedling quality was the S 2. Thus, R. grandis is a species that needs shade in the early stage of its development.

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Substrate, Lime, Phosphorus and Topdress Fertilization in Macaw Palm Seedling Production

Cited by 22 publications

References 2 publications

Acclimation responses of macaw palm seedlings to contrasting light environments

Acclimation responses of macaw palm seedlings to contrasting light environments

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

Different substrates and protected environments for the initial development of Richeria grandis Vahl seedlings

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