Adubação fosfatada no crescimento inicial e na nutrição de mudas de pinhão-manso

Freiberger, Mariângela Brito; Guerrini, Iraê Amaral; Castoldi, Gustavo; Pivetta, Laerte Gustavo

doi:10.1590/s0100-06832014000100023

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…There was a 544% reduction in NL in the absence of P (0 mg dm -3 ) in relation to the estimated maximum yield. Freiberger et al (2014) stated that plants with P deficiency present reduced leaf number and reduced leaf area, which corroborates the results found in the present work.…”

Section: Resultssupporting

confidence: 93%

Growth and nutritional efficiency of acacia seedlings in response to phosphate fertilization

Araújo¹,

Custódio²,

Santos³

et al. 2020

Agraria

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Acacia mangium Willd cultivation is a viable option to meet the growing demand for wood in the forest market. However, there is little information related to its nutritional requirements in the seedling growth phase. The objective of this study was to evaluate the growth and nutritional efficiency of acacia seedlings in response to phosphate fertilization. The experimental design was completely randomized with five treatments, and with five replications each. The treatments consisted of five phosphorus (P) doses: 0, 50, 100, 150 and 200 mg dm -3 , and triple superphosphate (46% P 2 O 5 ) was used as the mineral source. The plant height, stem diameter, leaf number, shoot, root and total dry matter, P content in leaves, stem and roots, and P efficiency of uptake, translocation and use were subsequently evaluated 120 days post-transplant. The rate of 150 mg dm -3 of P showed the best growth and efficiency results for P use. The increases observed in acacia seedlings due to the increase in P rates show the importance of adequate phosphate nutrition in the development of this species. Thus, 150 mg dm -3 of P is the recommended rate for Acacia mangium seedling cultivation.

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Section: Resultssupporting

confidence: 93%

Growth and nutritional efficiency of acacia seedlings in response to phosphate fertilization

Araújo¹,

Custódio²,

Santos³

et al. 2020

Agraria

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“…A altura, o diâmetro de colo e o número de folhas de pinhão-manso foram significativamente menores nas plantas não adubadas com P (Tabela 3). Resultados semelhantes foram encontrados por Freiberger et al (2014), em que a diferença desses tratamentos não adubados com P em relação aos adubados ficou mais pronunciada a partir dos 60 dias após o transplantio. Não houve diferenças significativas entre as doses de 106 e 318 mg.dm -3 de P para as características altura e diâmetro de colo, enquanto, na maior dose de P, as plantas possuíram mais folhas.…”

Section: Resultsunclassified

Crescimento do pinhão-manso em resposta à adubação fosfatada e à compactação de um Latossolo Vermelho Amarelo sob cultivo em ambiente protegido

et al. 2021

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O presente trabalho objetivou quantificar o crescimento de plantas jovens de pinhão-manso submetidas a variações de doses de fósforo (P) e de massas específicas de um solo Latossolo Vermelho Amarelo. Previamente, na micro-região de Januária, foi coletada uma amostra de solo na camada de 20 a40 cm, certificando-se, em laboratório, da baixa disponibilidade de P – 1,4 mg dm-3 de P – a fim de se aplicar os tratamentos de interesse. Foram aplicadas doses de 0, 106 e 318 mg dm-3 de P, utilizando a fonte superfosfato simples; e os solos foram compactados até atingirem massas específicas de solo iguais a 1,53; 1,72 e 1,91 kg dm-3, em esquema fatorial completo, totalizando nove tratamentos. O cultivo foi em vasos de PVC com dimensões de 19,4 cm de diâmetro interno e 23,5 cm de altura, com volume útil de 5,912 dm3 de solo. O crescimento das plantas foi determinado por meio de mensurações de altura de planta, diâmetro de colo, número de folhas e consumo hídrico ao longo do ciclo; e de massa seca de raízes, caule e folha a época da coleta do experimento. Para análise estatística dos dados fez-se análise de variância, teste de média Tukey e análise de regressão. De modo geral, as características de crescimento das plantas apresentaram resposta mais pronunciada à adubação fosfatada comparada à compressão física testada. As raízes de pinhão-manso foram incapazes de penetrar camada de solo com massa específica de solo igual a 1,91 kg dm-3.

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“…The largest stem diameter of the collection with increasing phosphorus addition is attributable to the fact that this nutrient is part of the structure of the plant and several key molecules in its metabolism, composing membranes (phospholipids), RNA, DNA, ATP and carbohydrate esters (FREIBERGER et al, 2014). According to Martins et al (2015), with the increase in shading, the photosynthetic rate reduces and, consequently, the amount of photoassimilates is reduced, providing a gradual increase in the diameter of the collar throughout the cultivation cycle.…”

Section: Discussionmentioning

confidence: 99%

PHOSPHATE FERTILIZATION AND SHADING ON THE INITIAL GROWTH AND PHOTOCHEMICAL EFFICIENCY OF Campomanesia xanthocarpa O. BERG.

Silvério

Espíndola

Santos

et al. 2020

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Campomanesia xanthocarpa O. Berg. (“Gabirobeira”, Myrtaceae) is a versatile fruit tree species native in Cerrado. Studies of mineral fertilization and luminous conditions with the species are incipient. Thus, the aim was to evaluate the initial growth and photochemical aspects in C. xanthocarpa cultivated under phosphate fertilization and shading levels. The experiment was carried out in plastic pots and the factors under study consisted of five doses of phosphorus: 0, 50, 100, 150 and 200 mg kg soil-1, and two shadings levels: 0% (full sun) and 50%. The treatments were arranged in a 5 x 2 factorial scheme, in a randomized block design, with four replications. The greatest growth characteristics occurred at 240 days after transplantation. The highest chlorophyll index was seen in shaded leaves. The highest values of variable and maximum chlorophyll-a fluorescence were with 10.8 and 11.6 mg P kg-1 in shaded environments, and with 120.0 and 81.81 mg P kg-1, under full sun. The highest photochemical efficiency in photosystem II (Fv/Fm) was under full sun with 33.33 mg P kg-1. The analysis of main components explained 78.82% of the remaining variability. The shaded C. xanthocarpa plants showed higher photochemical yields with the addition of low phosphorus doses. Phosphate fertilization contributed to the mitigation of photochemical damage in young plants of C. xanthocarpa cultivated under full sun.

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Adubação fosfatada no crescimento inicial e na nutrição de mudas de pinhão-manso

Cited by 9 publications

References 18 publications

Growth and nutritional efficiency of acacia seedlings in response to phosphate fertilization

Growth and nutritional efficiency of acacia seedlings in response to phosphate fertilization

Crescimento do pinhão-manso em resposta à adubação fosfatada e à compactação de um Latossolo Vermelho Amarelo sob cultivo em ambiente protegido

PHOSPHATE FERTILIZATION AND SHADING ON THE INITIAL GROWTH AND PHOTOCHEMICAL EFFICIENCY OF Campomanesia xanthocarpa O. BERG.

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