Eficiência nutricional de espécies arbóreas em função da fertilização fosfatada

Fontes, Alexandre Gomes; Gama-Rodrigues, Antônio Carlos; Gama-Rodrigues, Emanuela Forestieri

doi:10.4336/2013.pfb.33.73.392

Cited by 16 publications

(14 citation statements)

References 7 publications

(14 reference statements)

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“…Com esses dados, observa-se que as plantas são eficientes na utilização do P para suas funções vitais, pois se desenvolvem em baixas concentrações de P no solo, sem apresentar sintomas de deficiências. Fontes et al (2013) verificaram elevada produção de massa em M. caesalpinifolia em solos com baixos teores de P, além disso, a espécie não respondeu à elevação da saturação por bases. Segundo os autores, espécies com esse comportamento têm melhor desempenho nos programas de revegetação de áreas degradadas.…”

Section: Folhasunclassified

Saturação por Bases e Doses de P no Crescimento e Nutrição de Mudas de Cerejeira (Amburana acreana Ducke)

Vieira¹,

Weber²,

Scaramuzza³

2015

NATIVA

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RESUMO:A cerejeira (Amburana acreana Ducke) é considerada uma espécie nativa vulnerável à extinção, tornando a necessidade de estimular sua produção de mudas uma prática indispensável. No entanto, pouco se sabe sobre suas exigências nutricionais. Dessa forma, objetivou-se verificar a influência de diferentes níveis de saturação por bases e de doses de P no crescimento e na nutrição de mudas da A. acreana. O experimento foi instalado em ambiente protegido com os tratamentos dispostos em sacos plásticos com capacidade para 2,5 kg, em combinações de quatro níveis de saturação por bases (20,5, 50, 60 e 70%) com quatro diferentes doses de P (0, 40, 80 e 120 kg ha -1 ), utilizando-se o delineamento em blocos casualizados com cinco repetições, uma planta por parcela. Foram efetuadas avaliações de altura, diâmetro de coleto e a relação entre altura e diâmetro, a cada 30 dias. Após 120 dias, as mudas foram seccionadas em folhas, caule e raiz para avaliação da biomassa. Do material vegetal seco e moído determinaram-se os teores de macronutrientes. O crescimento em diâmetro e a produção de massa seca nas folhas das mudas de A. acreana não foram influenciados pela elevação da saturação por bases e doses de P. Isso porque, não se observou elevação nas concentrações de macronutrientes com os tratamentos testados. Palavras-chave: Calagem, espécie florestal, nutrição de planta, desenvolvimento.ABSTRACT: Cerejeira trees (Amburana acreana Ducke) are considered native forest specie vulnerable to extinction, making the need to stimulate their seedlings production an indispensable practice. However, little is known about it nutritional requirements. This study aimed at verifying the influence of different cation saturation levels and P levels on growth and nutrition of A. acreana seedlings. The experiment was conducted on greenhouse with the treatments placed in plastic bags with a capacity of 2.5 kg in a combinations of four saturation (20.5, 50, 60 and 70%) with four different P doses (0, 40, 80 and 120 kg ha -1 ), using a randomized block design with five replications, one plant per block. Height, diameter and the relation between height and diameter were evaluated every 30 days. After 120 days, the seedlings were sectioned into leaves, diameter and root to biomass production. In the ground and dried material were determinate the macronutrients levels. The diameter growth and dry matter production in the leaves of A. acreana seedlings were not influenced by the increase in cation saturation and P doses. This is because was not observed elevation on the macronutrients concentration with the treatment tested.

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Section: Folhasunclassified

Saturação por Bases e Doses de P no Crescimento e Nutrição de Mudas de Cerejeira (Amburana acreana Ducke)

Vieira¹,

Weber²,

Scaramuzza³

2015

NATIVA

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“…In order to guarantee that the plants express their vigour to the maximum in the shortest possible time, nutritional management practices, based on the efficient absorption, accumulation and conversion of nutrients into dry matter, are also commonly adopted (Fontes et al, 2013;Batista et al, 2015). Such techniques ensure an adequate supply of nutrients according to the nutritional efficiency of each genotype and/or cultivar, and promote the growth of plants of good nutritional status with maximum efficiency in the use of inputs, and optimise the financial resources spent on production (Carvalho et al, 2012;Fontes et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Growth and nutrient accumulation in three peach rootstocks until the grafting stage

2019

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Analysing growth and nutrient accumulation is generally employed for guiding the fertilisation practices in the seedling-production chain. In the production of peach rootstock, such evaluations can provide information to aid can to aid in discrimination available genotypes, especially regarding the efficient use and conversion of fertiliser into dry matter, which can reduce the time required to obtain plants suitable for grafting. The aim of this study, was to investigate the differences in growth and nutrient accumulation in three peach-rootstock cultivars. A completely randomised experimental design was used, in a 3 x 4 factorial scheme, including three peach rootstocks ('Flordaguard', 'Capdeboscq' and 'Okinawa Roxo') and four periods of growth evaluation (20, 40, 60 and 80 days after transplanting - DAT), giving a total of 12 treatments, with four replications, one for each plant. The Flordaguard and Capdeboscq cultivars showed greater height and stem diameter as well as a greater accumulation of total dry matter at 80 DAT, and both followed the distribution: leaves (67%) > roots (33%), while total dry-matter production in 'Okinawa Roxo' was less, following the order: leaves (71%) > roots (29%). The rootstock under evaluation showed variations in growth, confirmed by the physiological indices, except for the leaf area and specific leaf area. In general, macronutrient accumulation in the shoots and roots of the cultivars during each growth period was different, suggesting intrinsic differences in each of the genetic materials regarding nutrient demand for maintaining the metabolic processes which are vital to plant growth.

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“…Nutrient use efficiency is one of the main parameters employed to differentiate, characterize and classify species with respect to nutritional behavior (Fontes, Gama-Rodrigues, & Gama-Rodrigues, 2013). This feature depends on root-shoot transport and plant metabolic demand and, according to Siddiqi and Glass (1981) is obtained by the quotient between (total biomass) 2 and total nutrient accumulation in the plant, which indicates its capacity to convert the nutrient uptake into total dry matter.…”

Section: Introductionmentioning

confidence: 99%

Macronutrients Use Efficiency and Phosphorus Exportation by Melon Plants in Response to Fertilization

Pinheiro¹,

Artur²,

Taniguchi³

et al. 2018

JAS

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This study aimed to evaluate macronutrients use efficiency and phosphorus accumulation, partition and partial balance in the melon hybrid Goldex F1, in response to mineral and organic fertilizers. The following fertilizations were evaluated: mineral fertilizer; bovine manure; bovine manure associated with mineral fertilizer; poultry litter; and poultry litter associated with mineral fertilizer. Plants were collected and separated into leaves, stem, and flowers and, when there were, unripe and ripe fruits for chemical analysis. Phosphorus accumulation increased along the melon crop cycle. Phosphorus partition between leaves + stems + flowers and unripe fruits + ripe fruits showed that about 80% of P was allocated to the fruits. The decreasing order of use by the plant was S > P > Mg > Ca > N > K. Only the treatment with poultry litter was within the range considered as adequate for P recovery. Mineral and organic fertilizers did not interfere with nutrient accumulation and P partition by the melon plants.

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Eficiência nutricional de espécies arbóreas em função da fertilização fosfatada

Cited by 16 publications

References 7 publications

Saturação por Bases e Doses de P no Crescimento e Nutrição de Mudas de Cerejeira (Amburana acreana Ducke)

Saturação por Bases e Doses de P no Crescimento e Nutrição de Mudas de Cerejeira (Amburana acreana Ducke)

Growth and nutrient accumulation in three peach rootstocks until the grafting stage

Macronutrients Use Efficiency and Phosphorus Exportation by Melon Plants in Response to Fertilization

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