Biomassa, trocas gasosas e aspectos nutricionais de plantas jovens de pau de balsa (Ochroma pyramidale (Cav. Ex Lamb.) Urb.) submetidas à fertilização fosfatada em ambientes contrastantes de irradiância

Cunha, Hellen Fernanda Viana; Gonçalves, José Francisco de Carvalho; Santos, Ulysses Moreira dos; Ferreira, Marciel José; Peixoto, Paulo Henrique Pereira

doi:10.18671/scifor.v44n109.21

Cited by 5 publications

(6 citation statements)

References 38 publications

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“…Matos) e obtiveram respostas positivas de crescimento em altura e diâmetro do colo quando o esterco compunha cerca de 30% do volume do substrato. Cunha et al (2016) submeteram mudas de pau-de-balsa à adubação fosfatada em ambiente controlado e verificaram boas taxas de crescimento, principalmente quando combinadas com alta luminosidade, o que indica que a adição de fontes de macronutrientes ao substrato acelera o crescimento e acúmulo de biomassa e reduz o tempo de produção para que as mudas desta espécie sejam levadas ao campo.…”

Section: Resultsunclassified

“…Com relação à sua importância econômica, O. pyramidale tem madeira leve e de fácil trabalhabilidade, sendo utilizada para a confecção de pequenos objetos e principalmente jangadas ou balsas flutuantes, o que justifica seu nome popular (LORENZI, 2008). Adicionalmente, a espécie tem demonstrado potencial em plantios para recuperação de áreas degradadas, devido ao seu rápido desenvolvimento e tolerância à alta radiação (CUNHA et al, 2016;COSTA et al, 2012;MARENCO et al, 2001).…”

Section: Introductionunclassified

“…Mudas de Ochroma pyramidale fertilizadas com nitrogênio nas formas nítrica e amoniacal exibiram valores de área foliar até quatro vezes maiores que plantas não fertilizadas com nitrogênio em um estudo realizado por Cunha (2014). Neste mesmo estudo foi verificado ganho de biomassa até nove vezes maior em plantas fertilizadas comparativamente às que não receberam nitrogênio.…”

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USO DE SUBSTRATOS ORGÂNICOS NO CRESCIMENTO INICIAL DE PAU-DE-BALSA Ochroma pyramidale (Cav. ex Lam.) Urb.

Gomes¹,

Reis²

2018

TREED

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RESUMO O objetivo do estudo foi avaliar o efeito do uso de esterco bovino e serragem no crescimento de mudas de Ochroma pyramidale, uma espécie florestal de interesse madeireiro e de grande potencial para plantios de recuperação de áreas degradadas. Utilizou-se o delineamento inteiramente casualizado, sendo quatro tratamentos: T0 (terra preta), T1 (terra preta + esterco bovino curtido), T2 (terra preta + serragem curtida) e T3 (terra preta + esterco bovino + serragem) com 15 repetições cada. Ao final de 90 dias foram medidas a altura das plantas, o diâmetro do colo, a área foliar e determinadas a massa seca da parte aérea, da raiz e total. A adição de esterco proporcionou crescimento em altura e em área foliar três vezes maior em comparação ao tratamento controle. A adição de serragem inibiu o crescimento das mudas e apresentou os menores valores em todas as variáveis analisadas. Recomenda-se o uso de terra preta + esterco bovino curtido na proporção de 3:1 para a produção de mudas de pau-de-balsa e desaconselha-se o uso de serragem, mesmo quando em combinação com o esterco bovino. PALAVRAS-CHAVE: esterco bovino, produção de mudas, serragem. USE OF ORGANIC SUBSTRATES IN INITIAL GROWTH OF PAU-DE-BALSA Ochroma pyramidale (Cav. ex Lam.) Urb.

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Section: Resultsunclassified

Section: Introductionunclassified

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USO DE SUBSTRATOS ORGÂNICOS NO CRESCIMENTO INICIAL DE PAU-DE-BALSA Ochroma pyramidale (Cav. ex Lam.) Urb.

Gomes¹,

Reis²

2018

TREED

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“…In general, there is great variation in the capacity of different species to extract nutrients from soil [ 64 ], which makes the concentration of leaf nutrients found in different light environments an inherent characteristic of each species [ 65 ]. The leaf-nutrient content found in this study are within the range observed in tropical tree species, despite the variation among environments [ 18 , 65 , 66 , 67 ].…”

Section: Discussionmentioning

confidence: 99%

Photochemical Efficiency and Oxidative Metabolism of Tree Species during Acclimation to High and Low Irradiance

Junior

Maia

Martins

et al. 2020

Plants

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The balance between efficiency of absorption and use of light energy is fundamental for plant metabolism and to avoid photoinhibition. Here, we investigated the effects of light environments on the photosynthetic apparatus of tropical tree species of three successional groups (pioneer, mid-, and late successional) subjected to different light conditions: full sunlight (FS), moderate shade (MS), and deep shade (DS). Twenty-nine ecophysiological parameters were correlated with each other. The pioneer species exhibited better photochemical performance and a more efficient antioxidant enzymatic system in comparison with the other successional groups. Plants in FS showed higher intensity of lipid peroxidation, with superoxide dismutase having a prominent role in the antioxidant system. At lower irradiance the enzymatic activity was reduced, and the photochemical efficiency was the preferred way to reduce oxidative damages. P was highly related to photochemical yield, and the N modulation amplified the light harvesting complex in DS to the detriment of the antioxidant system. Despite evidence of cell damage, most species exhibited the ability to adjust to high irradiance. Contrary to expectations, Hymenea courbaril (late-successional) exhibited higher plasticity to fluorescence, nutritional, and antioxidant parameters. Only Carapa guianensis (late-successional) displayed photoinhibitory damage in FS, and Ochroma pyramidale (pioneer) did not survive in DS, suggesting that acclimation to shade is more challenging than to high irradiance.

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“…The species were classified according to the successional stage in pioneers, early and late secondary and climax (Budowski, 1965). Some studies were evidenced by scientific research in responses to light variation, in the initial development of forest species such as: ''pau de balsa'' (Ochroma pyramidale) (CUNHA et al,. 2016); '' copaíba'' (Copaifera langsdorffii) (REIS et al, 2016); ''pimentarosa'' (Schinus terebinthifolius) (SCHWANTES et al, 2015); ''pau ferro'' (Caesalpinia ferrea) (LENHARD et al, 2013); ''angico'' (Anadenanthera falcata) (MOTA et al, 2013), between others.…”

Section: Introductionmentioning

confidence: 99%

MORPHOPHYSIOLOGICAL RESPONSE OF Khayasenegalensis A. Juss IN LIGHT LEVELS

Pereira¹,

Souza²,

Siebeneichler³

et al. 2023

JER

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For a good development of species with great economic value such as: Khaya senegalensis, which is exotic in Brazil, it is necessary analyzes of intrinsic characteristics to obtain responses of good adaptation to edaphoclimatic conditions in various regions of the country. Thus, the objective of this work was to investigate morphophysiological responses of seedlings of Khaya senegalensis under luminosity levels. An experiment was set up in the forest nursery at ''Universidade Federal do Tocantins'' , distributed in a completely randomized design, divided into five treatments in luminosity levels (full sun, 70, 50, 30% and Natural Shade). Over the months, physiological measurements were taken (Assimilation of CO 2 , Transpiration and stomatal conductance) and morphological (Height and DBH) with intervals of 30 days. At the end of the experiment, the total biomass and mass fractions (leaf, stem, root and total) were obtained. With that, there were significant results among the treatments tested for the species: Khaya senegalensis, because the levels of luminosity influenced the development of the seedlings, which obtained the highest growth rates in plants under partial levels (70, 50 and 30%) of luminosity. And also the physiological responses such as photosynthesis, transpiration and stomatal conductance were higher in high luminosity levels. That said, for the best initial development of the species: Khaya senegalensis regarding luminosity, it was evident that the partial levels (70, 50, 30%) favored the growth and quality of the seedlings, but the low level of light that arrives in the natural shade was not enough to guarantee the vigor of the African mahogany seedlings.

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Biomassa, trocas gasosas e aspectos nutricionais de plantas jovens de pau de balsa (Ochroma pyramidale (Cav. Ex Lamb.) Urb.) submetidas à fertilização fosfatada em ambientes contrastantes de irradiância

Cited by 5 publications

References 38 publications

USO DE SUBSTRATOS ORGÂNICOS NO CRESCIMENTO INICIAL DE PAU-DE-BALSA Ochroma pyramidale (Cav. ex Lam.) Urb.

USO DE SUBSTRATOS ORGÂNICOS NO CRESCIMENTO INICIAL DE PAU-DE-BALSA Ochroma pyramidale (Cav. ex Lam.) Urb.

Photochemical Efficiency and Oxidative Metabolism of Tree Species during Acclimation to High and Low Irradiance

MORPHOPHYSIOLOGICAL RESPONSE OF Khayasenegalensis A. Juss IN LIGHT LEVELS

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