Potassium supplying capacity of some tropical alfisols in southwest Nigeria as measured by intensity, quantity and capacity factors

Taiwo, A. A.; Adetunji, M. T.; Azeez, J. O.; Bamgbose, T.

doi:10.1007/s10705-009-9296-1

“…Vale ressaltar que os solos menos desenvolvidos do presente estudo apresentam teores elevados de K não trocável (Tabela 1), cuja contribuição para o desenvolvimento das plantas foi observado por Rupa et al (2001) em solos não fertilizados; no entanto, os autores advertem que essa contribuição pode causar desbalanço nutricional se fertilizações potássicas não forem adotadas para manter o solo produtivo e fértil. A contribuição de formas não trocáveis de K para o desenvolvimento das plantas é bastante documentada na literatura (RUPA et al, 2001;TAIWO;ADENTUNJI;AZEEZ, 2010), tendo em vista que o K não trocável representa a reserva de K de médio e longo prazo para as culturas.…”

Section: Solounclassified

“…Entre os diversos fatores que influenciam a disponibilidade de potássio (K) para as plantas, estão: a quantidade de potássio trocável (Q) e a quantidade de potássio em solução (I); a mineralogia do solo; a CTC; a textura do solo; a umidade do solo; o poder tampão de K, e o grau de desenvolvimento pedogenético do solo (MIELNICZUK, 1978;CHAVES;KINJO, 1987;SILVA et al, 2000). Em geral, utilizam-se apenas os dados de K trocável para recomendação de adubação para determinada cultura; no entanto, o K trocável pode não ser um bom indicador da disponibilidade de K para as plantas, especialmente em solos com minerais micáceos (ABASLOU; ABTAHI, 2008), já que esses minerais constituem a maior fonte de K nos solos, sendo responsáveis pelo controle de sua disponibilidade (TAIWO; ADENTUNJI; AZEEZ, 2010).…”

Section: Introductionunclassified

Relações quantidade/intensidade de potássio em solos representativos do Estado da Paraíba - Brasil

Santos

¹

,

Oliveira

²

,

Hoffmann

³

et al. 2013

RCA

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RESUMO: O conhecimento da relação quantidade/intensidade (Q/I) de potássio (K) é mais uma informação importante para avaliação da disponibilidade desse elemento no solo. Objetivou-se com este experimento avaliar a disponibilidade de K em solos representativos do Estado da Paraíba, por meio das curvas Q/I, e correlacionar essa disponibilidade com características químicas desses solos. Agitaram-se, em frascos de Erlenmeyer, amostras dos solos com solução de CaCl 2 2 mmol L -1 e teores de K variando de 0 a 60 mg L -1 , deixando-se em repouso por duas horas, para posterior determinação do K. Os parâmetros da relação Q/I foram calculados a partir de regressão linear e indicaram que os solos estudados, especialmente aqueles com menor grau de desenvolvimento pedogenético, tem o K adsorvido na forma preferencial, diminuindo os teores do elemento em solução. Além disso, os solos Planossolo Háplico, Neossolo Flúvico e Vertissolo Háplico possuem altos valores de poder tampão, o que possibilita manutenção do teor de K na solução do solo. Os teores de argila, CTC e K trocável no solo apresentaram correlação com o poder tampão de K.ABSTRACT: The knowledge of potassium quantity-intensity (Q/I) relationships constitutes important information to evaluate potassium (K) availability in soils. In this study, we aimed to evaluate K availability in Paraiba state soil by Q/I relationships and its relation with the chemical characteristics of these soils. Soil samples were agitated in Erlenmeyer flasks with 2 mmol L -1 CaCl 2 solution and K solution varying from 0 to 60 mg L -1 ; the mixture was then put to rest for 2 hours for determination of potassium levels. Quantity-intensity parameters were calculated by linear regression and results showed that soils in the present study, especially the less weathered ones, presented low levels of K in soil solution. In addition, Haplic Planosol, Fluvic Neosol and Haplic Vertisol present high potassium buffering capacity, which allows potassium supply in soil solution. Potassium buffering capacity correlated with clay and silt content, cation exchange capacity (CEC), and exchangeable potassium. Relações quantidade/intensidade de potássio em solos representativos do Estado da Paraíba -Brasil Potassium quantity-intensity relationships in representative soils of Paraiba State -Brazil

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“…This is even more important in Nigeria where the soils are mostly deficient in K and large quantities of the animal manures 1 3 produced are considered as waste products from the livestock industry. Many soils in Nigeria are deficient in K and the status of this element varied widely among soils (Taiwo et al 2009). For instance, exchangeable K in these soils will contribute to K nutrition in plant under exhaustive cropping without K fertilizer application; K removal from soil and input of non-exchangeable K-to-K uptake is about 90-95% of the total K uptake in plant (Srinivasarao et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of potassium release and fixation in some soils of Ogun State, Southwestern, Nigeria as influenced by organic manure

Taiwo¹,

Adetunji

²

,

Azeez

³

et al. 2018

Int J Recycl Org Waste Agricult

Self Cite

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Purpose The study investigated the effects of poultry and goat manures on the kinetics of potassium fixation and release in some sandy loam and loamy soils of Ogun State, Nigeria. Methods The treatments consisted of poultry and goat manures applied at 25 g and 100 g/5 kg soil set in completely randomized design with three replicates. Potassium fixation and release kinetics were computed from the analytical data. Results Experimental soils was sandy, slightly acidic, low in nutrients with 80% fixed potassium. However, manure application resulted in 74% reduction of the amount of K fixed by the soils. Elovich and power functions had the best fit for K released in soils treated with goat manure. The K release pattern in poultry manure-amended soil is best described by the parabolic diffusion, Elovich, and power functions, while the first-order equation described K release in soils treated with cattle manure. The potassium release rate constant correlated positively with K uptake. Conclusion The ability of the studied soils to fixed K was reduced with the application of organic manures. Potassium fixation decreased with increase in organic manure rates, 100 g/5 kg soil tends to be the optimum rate, and poultry manure had greater effect on the fixing and releasing power of K.

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“…This is even more important in Nigeria where the soils are mostly deficient in K and large quantities of the animal manures produced are considered as waste products from the livestock industry. Many soils in Nigeria are deficient in K and the status of this element varied widely among soils (Taiwo et al 2009). For instance, exchangeable K in these soils will contribute to K nutrition in plant under exhaustive cropping without K fertilizer application; K removal from soil and input of non-exchangeable K-to-K uptake is about 90-95% of the total K uptake in plant (Srinivasarao et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Organic amendment of an ultisol: effects on soil properties, growth, and yield of maize in Southern Guinea savanna zone of Nigeria

Ogundare

¹

,

Aiyelari

²

2012

Int J Recycl Org Waste Agricult

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Purpose The study investigated the effects of poultry and goat manures on the kinetics of potassium fixation and release in some sandy loam and loamy soils of Ogun State, Nigeria. Methods The treatments consisted of poultry and goat manures applied at 25 g and 100 g/5 kg soil set in completely randomized design with three replicates. Potassium fixation and release kinetics were computed from the analytical data. Results Experimental soils was sandy, slightly acidic, low in nutrients with 80% fixed potassium. However, manure application resulted in 74% reduction of the amount of K fixed by the soils. Elovich and power functions had the best fit for K released in soils treated with goat manure. The K release pattern in poultry manure-amended soil is best described by the parabolic diffusion, Elovich, and power functions, while the first-order equation described K release in soils treated with cattle manure. The potassium release rate constant correlated positively with K uptake. Conclusion The ability of the studied soils to fixed K was reduced with the application of organic manures. Potassium fixation decreased with increase in organic manure rates, 100 g/5 kg soil tends to be the optimum rate, and poultry manure had greater effect on the fixing and releasing power of K.

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Potassium supplying capacity of some tropical alfisols in southwest Nigeria as measured by intensity, quantity and capacity factors

Cited by 15 publications

References 23 publications

Relações quantidade/intensidade de potássio em solos representativos do Estado da Paraíba - Brasil

Relações quantidade/intensidade de potássio em solos representativos do Estado da Paraíba - Brasil

Kinetics of potassium release and fixation in some soils of Ogun State, Southwestern, Nigeria as influenced by organic manure

Organic amendment of an ultisol: effects on soil properties, growth, and yield of maize in Southern Guinea savanna zone of Nigeria

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