Acumulação de matéria seca e macronutrientes por dois cultivares de mandioca

Lorenzi, José Osmar; Gallo, J. Romano; Malavolta, E.

doi:10.1590/s0006-87051981000100014

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…The decline in the leaf contents coincides with the period when the plant transforms the fibrous roots into tuberous roots, which increases translocation of photoassimilates, produced on the leaves, to the reserve roots (Lorenzi et al, 1981;Rós et al, 2011;Silva et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Weed Interference on Growth and Leaf Nutrient Accumulation in Two Cassava Varieties

Moratelli

Ferreira

Canavessi

et al. 2021

JAS

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The development of cassava varieties with more efficient nutrient absorption can prevent losses caused by weed competition. The objective of this study was to evaluate dry matter accumulation and leaf nutrient content in traditional and improved cassava varieties, with and without coexistence with weeds throughout the cycle. A randomized complete block design was used in a 2 x 2 x 11 factorial scheme with four replications. The first factor consisted of two varieties (Baianinha and Clone 56-03); the second factor was composed of the conditions with and without coexistence with weeds, and the third factor was 11 harvest periods. Coexistence with weeds reduced leaf contents of N (20.8% and 24.8%), P (26.7% and 4.6%) and K (27.1% and 12.6%) for 'Baianinha' and 'Clone 56-03', respectively. For coexistence with 'Baianinha', the period up to the maximum daily nutrient accumulation rate (N, P and K) ranged from 82 to 99 days after planting (DAP), while for 'Clone 56-03', coexistence in this period ranged from 80 to 88 DAP. The plants from the variety 'Clone 56-03' presented higher total dry mass and root dry mass accumulation, as well as higher leaf contents of N, P and K than the traditional cassava variety 'Baianinha', especially when in coexistence with weeds during the whole cycle.

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Section: Discussionmentioning

confidence: 99%

Weed Interference on Growth and Leaf Nutrient Accumulation in Two Cassava Varieties

Moratelli

Ferreira

Canavessi

et al. 2021

JAS

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“…This study showed difference in nutrient accumulation in castor bean plants compared to other crops from the same family jatropha (Jatropha curcas L.), cassava, rubber, all representatives of Euphorbiaceae family, as well as castor bean. Regarding cassava crop, Lorenzi et al (1981) found that in two cultivars the most accumulated macronutrients in plant total dry mass were: N > K > Ca > Mg > P > S. Regarding rubber plant, Viegas et al (1992) found that the accumulation of nutrients per hectare in the dry mass of leaves was described by N > K > Ca > P > S > Mg. On the other hand, Laviola & Dias (2008) observed that the amount of nutrients absorbed by jatropha plants described a certain order by N > Ca > K > Mg > P > S in leaves and N > K > Ca > P > Mg > S in fruits.…”

Section: Days After Emergence/development Stages Of Cropmentioning

confidence: 99%

Accumulation of nutrients and growth in castor bean plants

Oliveira¹,

Oliveira²,

Silva³

et al. 2016

Científica

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Information about nutrient uptake and accumulation by different crops during development stages allows identifying periods of higher demand and an adequate fertilization management. An experiment under field conditions was carried out in order to evaluate macro and micronutrient accumulation in castor bean leaf tissue, as well as to identify nutrient uptake critical stages of this crop. Treatments were consisted of evaluation periods with samples collected every ten days until 160 days after emergence of crop. Castor bean plants showed higher macronutrient accumulation in descending order: N > K > Ca > S > Mg > P and the following micronutrients Fe > Mn > Zn > B > Cu > Mo. The highest accumulation rates of N, P and K nutrients occur from 20 to 110 days after emergence (DAE) with the highest N uptake from 30 to 40 DAE, remaining high until approximately 110 DAE. Regarding potassium, the highest uptake occurs between 40 and 50 DAE, with high uptake rates until approximately 110 DAE. The highest phosphorus uptake was between 80 and 90 DAE. The majority of macro and micronutrients were accumulated in leaves during most part of evaluation cycle.Additional keywords: growth analysis; nutrient accumulation rate; nutrient partitioning; Ricinus communis L. ResumoO conhecimento da absorção e do acúmulo de nutrientes por culturas, nas diferentes fases de desenvolvimento, permite identificar períodos de maior exigência e adequar o melhor manejo da adubação. Um experimento de campo foi realizado para avaliar o acúmulo de macro e micronutrientes nos tecidos vegetais da cultura da mamona, bem como identificar as fases críticas de absorção de nutrientes por parte dessa cultura. Os tratamentos foram constituídos das épocas de avaliação, com as coletas realizadas a cada dez dias e finalizadas aos 160 dias após a emergência da cultura. As plantas de mamona apresentaram maior acúmulo de macronutrientes em ordem decrescente: N > K > Ca > S > Mg > P, e os seguintes micronutrientes: Fe > Mn > Zn > > B > Cu > Mo. As maiores taxas de acúmulo dos nutrientes N, P e K ocorrem dos 20 aos 110 dias após a emergência (DAE), sendo que a maior taxa de absorção de N ocorreu dos 30 aos 40 DAE, permanecendo alta até aproximadamente 110 DAE. Com relação ao potássio, o pico de absorção desse nutriente está entre 40 e 50 DAE, com taxas de absorção relativamente elevadas até, aproximadamente, 100 DAE, e o maior pico de absorção de fósforo localizou-se entre 80 e 90 DAE. A maior parte dos macros e micronutrientes avaliados encontra-se acumulada nas folhas da cultura durante a maior parte do ciclo de avaliação.Palavras-chave adicionais: análise de crescimento; partição de nutrientes; Ricinus communis L.; taxa de acú-mulo de nutrientes;

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“…Em todos os tratamentos o nitrogênio foi o nutriente que apresentou maior concentração na folha, indicando maior necessidade deste nutriente, resultado que concorda com o obtido por Lorenzi et al (1981). Esses autores, avaliando a acumulação de macronutrientes em duas cultivares de mandioca em cinco épocas diferentes, verificaram que o nitrogênio teve maior teor foliar, independentemente das cultivares e épocas.…”

Section: Atributos Nutricionais Da Mandioqueiraunclassified

Água salina nos atributos químicos do solo e no estado nutricional da mandioqueira

Filho¹,

Santos²,

Azevedo³

et al. 2011

Rev. bras. eng. agríc. ambient.

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O objetivo do presente trabalho foi verificar a influência do uso de água salina nos atributos químicos do solo e no estado nutricional da mandioqueira. O trabalho foi conduzido na área experimental de Irrigação e Drenagem do IF Baiano, Campus de Senhor do Bonfim, BA (10o 28’S, 40o 11’W e 550 m). O delineamento experimental utilizado foi o inteiramente casualizado constando de sete tratamentos e três repetições. Os tratamentos consistiram de uma testemunha (sequeiro), um tratamento irrigado com água potável (100% da ETc) e cinco tratamentos irrigados com água salina com CE de 3 dS m-1 variando as lâminas aplicadas: 110, 120, 130, 140 e 150% da ETc. O uso de água salina aumentou a percentagem de sódio trocável, a razão de adsorção de sódio e a condutividade elétrica do solo, tanto na 0-0,20 como na 0,20-0,40 m de profundidade. Quanto ao estado nutricional foliar da mandioqueira, os tratamentos influenciaram apenas nos teores de cálcio, magnésio e cloro.

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Acumulação de matéria seca e macronutrientes por dois cultivares de mandioca

Cited by 10 publications

References 1 publication

Weed Interference on Growth and Leaf Nutrient Accumulation in Two Cassava Varieties

Weed Interference on Growth and Leaf Nutrient Accumulation in Two Cassava Varieties

Accumulation of nutrients and growth in castor bean plants

Água salina nos atributos químicos do solo e no estado nutricional da mandioqueira

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