Biomass yield, macronutrient diagnosis, and nitrogen and calcium uptake during early growth of physic nut

Garrone, Raphael Florencio; Campos, Aline Grella de; Silveira, Cristiane Prezotto; Lavres, José

doi:10.5935/1806-6690.20160003

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…O cálcio é um elemento fundamental na permeabilidade das membranas e manutenção da integridade celular, sendo exigido para a divisão e expansão das células. É componente da parede celular e lamela média, e ainda serve como ativador de algumas enzimas envolvidas no metabolismo de carboidratos, como a alfa-amilase (GARRONE et al, 2016). Mas é improvável que a disponibilidade deste elemento tenha alguma influência relevante no desenvolvimento da parte aérea das mudas de alface, pois o substrato T2, que proporcionou a melhor resposta, apresentou teor de cálcio menor que o substrato T4, que proporcionou a pior resposta.…”

Section: Substratosunclassified

Substrato À Base De Esterco De Coelho Na Produção De Mudas De Alface

Pereira

Antunes

Aquino

et al. 2020

NAT

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O uso de esterco de coelho pode contribuir para suprir a crescente demanda por substratos destinados à produção de mudas de hortaliças. Objetivou-se com este trabalho avaliar a utilização de esterco de coelho como substrato para produção de mudas de alface, após ser submetido a três diferentes processos de estabilização: vermicompostagem, processamento por meio de larvas de Cetoniinae e compostagem natural. Inicialmente foi realizada uma minuciosa caracterização dos substratos avaliados, determinando-se os teores totais, os teores disponíveis e a proporção da fração disponível de N, Ca, Mg, P e K, a densidade e a porosidade. Também foram avaliadas as variações do pH e da condutividade elétrica dos substratos ao longo de 28 dias do desenvolvimento das mudas. O desempenho dos diferentes substratos na produção de mudas de alface foi avaliado por meio da emergência das sementes e de características das mudas relacionadas com o desenvolvimento da parte aérea e da raiz. Pode-se concluir que o uso de esterco de coelho como substrato para a produção de mudas de alface é uma prática recomendada, desde que o seu processamento seja realizado por meio de vermicompostagem com Eisenia fetida ou por meio de larvas de Cetoniinae.Palavras-chave: Cetoniinae; Eisenia fétida; Lactuca sativa; composto orgânico. RABBIT MANURE BASED SUBSTRATE FOR THE PRODUCTION OF LETTUCE SEEDLINGS ABSTRACT: The use of rabbit manure can contribute to supply the growing the demand by substrates intended for the production of vegetable seedlings, This job was realized with the objective of check the use of rabbit manure as substrate to the production of lettuce seedlings, after being submitted to three different stabilization processes: vermicomposting, processing by means of Cetoniinae larvae and natural composting. Were determined the total levels, available and the proportion of the available fraction of N, Ca, Mg, P and K, the density and a porosity of the substrates. It was also checked the pH variations and of the electric conductivity of the substrates over 28 days of the seedlings development. The performance of the different substrates in the production of lettuce seedlings was evaluated through seed emergence and seedling characteristics related to shoot and root development. It can be concluded that the use of rabbit manure as substrate to lettuce seedlings production is a recommended practice, provide that it is processed by means of vermicomposting with Eisenia fetida or by means of larvae of Cetoniinae.Keywords: Cetoniinae; Eisenia fétida; Lactuca sativa; organic compost.

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Section: Substratosunclassified

Substrato À Base De Esterco De Coelho Na Produção De Mudas De Alface

Pereira

Antunes

Aquino

et al. 2020

NAT

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“…In addition to its economic potential, this species has shown adequate growth under adverse soil-climatic conditions. This suggests tolerance to abiotic stress, with the possibility of cultivation in areas with limited plant development (e.g., arid and semi-arid regions) and the ability to use nutrients efficiently (Silva et al, 2013;Garrone et al, 2016;Rodrigues et al, 2016). These characteristics make physic nut an excellent model to evaluate physiological responses regarding the tolerance of the species to abiotic stresses, such as low nutrient availability.…”

Section: Introductionmentioning

confidence: 99%

Prognosis of physiological disorders in physic nut to N, P, and K deficiency during initial growth

Santos

Macedo

Zanchim

et al. 2017

Plant Physiology and Biochemistry

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The description of physiological disorders in physic nut plants deficient in nitrogen (N), phosphorus (P) and potassium (K) may help to predict nutritional imbalances before the appearance of visual symptoms and to guide strategies for early nutrient supply. The aim of this study was to evaluate the growth of physic nuts (Jatropha curcas L.) during initial development by analyzing the gas exchange parameters, nutrient uptake and use efficiency, as well as the nitrate reductase and acid phosphatase activities and polyamine content. Plants were grown in a complete nutrient solution and solutions from which N, P or K was omitted. The nitrate reductase activity, phosphatase acid activity, polyamine content and gas exchange parameters from leaves of N, P and K-deficient plants indicates earlier imbalances before the appearance of visual symptoms. Nutrient deficiencies resulted in reduced plant growth, although P- and K-deficient plants retained normal net photosynthesis (A), stomatal conductance (g) and instantaneous carboxylation efficiency (k) during the first evaluation periods, as modulated by the P and K use efficiencies. Increased phosphatase acid activity in P-deficient plants may also contribute to the P use efficiency and to A and gs during the first evaluations. Early physiological and biochemical evaluations of N-, P- and K-starved plants may rely on reliable, useful methods to predict early nutritional imbalances.

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“…This may be related to the particularities of the species, which is a pioneer (Maker & Andrade, 2007). In general, high N level is associated with the high rate of photosynthesis that may reflect the increase in biomass and leaf area (Garrone et al, 2016).…”

Section: Nitrogen Levels In Forest Speciesmentioning

confidence: 99%

Compartmentalization and efficiency biological of nitrogen utilization in dry tropical forest

Silva

Freire

Barbosa³

et al. 2018

Agraria

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Studies of nutrient efficiency and compartmentalization of nutrients in dry forests can contribute to the understanding of the nutrition of these forests because significant nutrient depositions come from leaf and branch fractions and are mostly derived from leguminous species, emphasizing the importance of nitrogen in cycling of these environments. This work aimed to determine the compartmentalization and efficiency biological of nitrogen utilization of the forest species with the highest importance value in a fragment of Caatinga hiperxerófila in Pernambuco. In the species was estimated the leaf biomass, using allometric equations. Leaves and stem parts were sampled for determination of nitrogen content. The biological utilization efficiency was calculated for each species. The biomass of the stem was 10.12 kg plant -1 and of the leaf was 0.99 kg plant. Higher N contents were observed in the leaves and stem of Poincianella bracteosa, associated to the high biomass of the species. The most efficient species to use nitrogen were Myracrodruon urundeuva and Bauhinia cheilantha, which could be indicated for areas with low levels of organic matter.Key words: forest nutrition; forest biomass; nitrogen content Compartimentalização e eficiência de utilização biológica de nitrogênio em floresta tropical seca RESUMO: Estudos de eficiência nutricional e compartimentalização de nutrientes em florestas secas podem contribuir para compreensão da nutrição dessas florestas porque deposições significativas de nutrientes são oriundas das frações folhas e galhos e são provenientes, em sua maioria, de espécies leguminosas, ressaltando a importância do nitrogênio na ciclagem nutricional desses ambientes. Este trabalho objetivou determinar a compartimentalização e eficiência de utilização biológica de nitrogênio das espécies florestais com maior valor de importância em fragmento de Caatinga hiperxerófila em Pernambuco. Nas espécies foi estimada a biomassa foliar, utilizando-se equações alométricas. Foram amostradas folhas e partes do caule para a determinação do teor de nitrogênio. A eficiência de utilização biológica foi calculada para cada espécie. A biomassa do caule foi de 10,12 kg planta -1 e da folha de 0,99 kg planta -1 . Maiores conteúdos de N foram observados nas folhas e caule da Poincianella bracteosa, associado à elevada biomassa da espécie. As espécies mais eficientes em utilizar nitrogênio foram Myracrodruon urundeuva e Bauhinia cheilantha podendo ser indicadas para áreas com diagnóstico de baixos teores de matéria orgânica. Palavras-chave: nutrição florestal; biomassa florestal; conteúdo de nitrogênioCompartmentalization and efficiency biological of nitrogen utilization in dry tropical forest Rev. Bras.

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Biomass yield, macronutrient diagnosis, and nitrogen and calcium uptake during early growth of physic nut

Cited by 6 publications

References 16 publications

Substrato À Base De Esterco De Coelho Na Produção De Mudas De Alface

Substrato À Base De Esterco De Coelho Na Produção De Mudas De Alface

Prognosis of physiological disorders in physic nut to N, P, and K deficiency during initial growth

Compartmentalization and efficiency biological of nitrogen utilization in dry tropical forest

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