Evaluation of Potassium Quantity-Intensity Relationships in Calcareous Soils

Al-Kanani, T.; Barthakur, N. N.; Hussien, A. J.

doi:10.1097/00010694-199102000-00006

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As correlações entre o poder tampão de K e as características dos solos estudados também foram observadas em outros estudos, como a correlação com o teor de silte e argila (SILVA et al, 2000), e com a CTC do solo (CHAVES; KINJO, 1987;AL-KANANI;BARTHAKUR;HUSSEIN, 1991). É importante ressaltar que quando um solo está sendo continuamente cultivado e o K absorvido, sem reposição através de fertilização, o poder tampão pode aumentar; esse aumento pode ocorrer especialmente em solos com materiais micáceos, já que esses minerais adsorvem preferencialmente o K em relação a outros cátions (LE ROUX; SUMNER, 1968), fato que pode ocorrer nos solos Neossolo Litólico e do Neossolo Flúvico do presente estudo.…”

Section: Solounclassified

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

Santos

Oliveira

Hoffmann

et al. 2013

RCA

View full text Add to dashboard Cite

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

show abstract

Section: Solounclassified

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

Santos

Oliveira

Hoffmann

et al. 2013

RCA

View full text Add to dashboard Cite

show abstract

“…This conversion decreases the K fixation capacity of the soil. The status of K on Iraqi soil has been studied by many investigators (Al-Kanani, et al 1991;Al-Zubaidi, 2003;Ahmed and Sheikh-Abdullah, 2020). Using thermodynamic methods showed that the rate of release of K from Iraqi soils is very low and this may explain the response of most Iraqi Iraqi soils to K-fertilizers application in spite of their high content of K, availability of K to plant depends on its intensity, capacity, and renewal rate in soils.…”

Section: Introductionmentioning

confidence: 99%

“…These are possible factors responsible for the discrepancy between our results and those above mentioned authors. Since illite and vermiculite constituted between 5-20% of the silica clay content respectively (Al-Kanani et al 1991; Rasul 2021) of these calcareous soils. The K + -soil mineral interactions may indeed be contributing factors to these linear graphs.…”

mentioning

confidence: 98%

“…It is not clear why this curvature is absent. None the less, the following hypothesize can be drawn: 1-Since K + exchange coefficient was found to be independent of calcite solubility (Al-Kanani, et al 1991), it is probable that the interactions between K + and soil mineral may have contributed to the relatively high values of exchange coefficient.2-A masking effect produced by a relatively high concentration of exchangeable K + . These are possible factors responsible for the discrepancy between our results and those above mentioned authors.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Potassium Buffering Potential in Some Burne Soils of North Iraq

Alsultan

Al-Obaidi

2022

TJAS

View full text Add to dashboard Cite

This research was conducted to study potassium buffering potential behavior in some burned soils of Baweza – Mosul and Zawita- Dohuk , in north of Iraq. Potassium forms and the buffering potential phenomenon were studied by using thermodynamic parameters according to quantity- intensity ratio (Q/I) at 298 oK) The main results could be summarized as follows A great affection for the firing processto cause a high potassium availability and lost by leaching. The ARKe value ranged widely from 0.02 to 0.08 (mol L-1)1/2, the potassium labile pool (LK) rangedfrom 7.951 to 27.919 cmolc kg-1, the potential buffering capacity (PBCK) ranged between 285.47 and 369.48 cmolc kg-1 (mol L-1)-1/2, the free energy of exchange (-G) were range between 3291.8 and 4819.8 kJ mole-1 and the Gapon selectivity coefficient (kG) values fluctuated within the range 8.44 to 12.88 (L mol-1) 1/2.PF values were 0.018 to 0.025 .

show abstract

Evaluation of Potassium Quantity-Intensity Relationships in Calcareous Soils

Cited by 2 publications

References 0 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

Potassium Buffering Potential in Some Burne Soils of North Iraq

Contact Info

Product

Resources

About