Phosphorus forms and fixation capacity of representative soils in Akwa Ibom State of Nigeria

Ibia, T. O.; Udo, E. J.

doi:10.1016/0016-7061(93)90087-2

Cited by 27 publications

(21 citation statements)

References 18 publications

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“…70, 73.38, 50.83, 82.54, 29.00 and 22.17 ppm, respectively. For the soil studied the amount of inorganic P fractions was in the order: Red-P > Fe-P > Al-P > Occl-P > Ca-P > Sal-P. A similar trend had been reported by several authors (Uzu et al, 1975;Ibia and Udo, 1993;Loganathan et al, 1982;Sutton, 1987 andOsodeke andKamalu, 1962). The low percentages of Sal-P and Ca-P in the soils are due to the high rainfall leading to the leaching losses of bases resulting to low pH of these soils.…”

Section: Calcium Phosphorus (Ca-p)supporting

confidence: 69%

Phosphorus Status in the Soils of Imphal West District, Manipur (India)

Watham¹,

Athokpam²,

Chongtham³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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Section: Calcium Phosphorus (Ca-p)supporting

confidence: 69%

Phosphorus Status in the Soils of Imphal West District, Manipur (India)

Watham¹,

Athokpam²,

Chongtham³

et al. 2018

Int.J.Curr.Microbiol.App.Sci

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“…with a mean value of 109 mg kg −1 [61] and in Nigeria it varied from 79 to 1410 mg kg −1 [62]. Total P contents of nine top soils from the Savanna regions of Ghana ranged from 60 to 173 mg kg −1 [63], while Acquaye and Oteng [64] obtained 104…”

Section: Total Phosphorusmentioning

confidence: 99%

Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia

Melese

Gebrekidan

Yli‐Halla

et al. 2015

Applied and Environmental Soil Science

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Soil acidity and low availability of P limit crop production in the highlands of Ethiopia. The objective of this study was to determine the P status, distribution and forms of inorganic P and relate them to selected chemical properties of eight representative acidic surface soil samples from Farta District. Soil pH (H 2 O) varied between 4.74 and 5.50. The moderate to high CEC suggests that besides kaolinite, the soils also contain expandable 2 : 1 clay minerals. Though the total P content was high, the available Olsen P content was very low or low in all soils except one. In most soils, the abundance of inorganic P fractions was as follows: P bound by oxalate extractable iron (Fe ox -P) > reductant soluble Fe-P > occluded Al-Fe-P > P bound by oxalate extractable aluminum (Al ox -P) > calcium bound P (Ca-P). Olsen P had a very strong positive correlation ( ≤ 0.01) with Al ox -P ( = 0.98), Fe ox -P ( = 0.96), and oxalate extractable P ( = 0.94). Though Fe bound P reserves were quite abundant and the degree of P saturation of Al ox + Fe ox (median 3.3%) was moderate, the extremely low P saturation of Al ox (median 0.5%) explains the P deficiency of the soils.

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“…A MOS desempenha papel ambivalente em relação à disponibilidade de P, já que tanto pode adsorvê-lo quanto bloquear os sítios de adsorção que ocorrem nas superfícies das argilas e óxidos de ferro e alumínio (Ibia & Udo, 1993). A adoção de sistemas de manejo que propiciem um incremento no teor de MOS ou de suas frações pode promover a redução da adsorção de P, pela formação de complexos que bloqueiam os sítios de adsorção na superfície dos óxidos de ferro e de alumínio (Tirloni et al, 2009).…”

Section: Introductionunclassified

Carbono, matéria orgânica leve e fósforo remanescente em diferentes sistemas de manejo do solo

Pereira

Loss

Beutler

et al. 2010

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar os teores de carbono orgânico total (COT), matéria orgânica leve (MOL) e fósforo remanescente (Prem), em áreas de cerrado sob sistema de plantio direto com diferentes cultivos de coberturas do solo, e compará-los aos de áreas sob preparo convencional e pousio. O experimento foi conduzido em campo, em um Latossolo Vermelho, de agosto de 2000 a março de 2007. O delineamento utilizado foi o de blocos ao acaso com parcelas subdivididas, sendo as parcelas constituídas pelos cinco sistemas de manejo do solo avaliados -pousio, preparo convencional e plantio direto com uso dos cultivos de cobertura crotalária (Crotalaria juncea), milheto (Pennisetum americanum) e braquiária (Urochloa brizantha) -, e as subparcelas pelos cultivos de soja e milho. Em março de 2007, coletaram-se amostras de solo das profundidades 0,0-0,025, 0,025-0,05, 0,05-0,10 e 0,10-0,20 m, das quais foram quantificados COT, MOL, estoques de COT e Prem. Em áreas sob plantio direto, o aumento nos teores de MOL pode reduzir a adsorção de fósforo ao solo. Sistemas de manejo que não envolvem revolvimento do solo favorecem o aumento do estoque de carbono orgânico nas camadas superficiais, enquanto o preparo convencional e o plantio direto com uso do milheto como planta de cobertura propiciam a incorporação mais profunda do carbono.Termos para indexação: Cerrado, estoque de carbono, plantas de cobertura, plantio direto, pousio, preparo convencional. Carbon, light organic matter and remaining phosphorus in different soil management systemsAbstract -The objective of this study was to evaluate the contents of total organic carbon (COT), light organic matter (MOL) and remaining phosphorus (Prem) on savanna areas under no tillage system using cover crops and to compare them to the ones observed under fallow and conventional tillage. The experiment was carried out in field conditions, in a Latossolo Vermelho (Rhodic Haplustox) from August 2000 to March 2007. A randomized complete block design was used, in a split-plot arrangement, with plots consisting of the five soil management systems evaluated -fallow, conventional tillage, and no tillage using sunn hemp (Crotalaria juncea), pearl millet (Pennisetum americanum), and palisade grass (Urochloa brizantha) as cover crops -, and sub-plots consisting of maize and soybean crops. In March 2007, the 0.0-0.025, 0.025-0.05, 0.05-0.10 e 0.10-0.20 m soil layers were sampled and assessed for COT, MOL, COT stocks and Prem. In the no tillage areas, increases in MOL content can reduce phosphorus adsorption in soil. Management systems without soil disturbance increases COT stocks in the superficial layers while conventional tillage and no tillage using pearl millet as cover crops provide a deeper incorporation of carbon in the soil.

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Phosphorus forms and fixation capacity of representative soils in Akwa Ibom State of Nigeria

Cited by 27 publications

References 18 publications

Phosphorus Status in the Soils of Imphal West District, Manipur (India)

Phosphorus Status in the Soils of Imphal West District, Manipur (India)

Phosphorus Status, Inorganic Phosphorus Forms, and Other Physicochemical Properties of Acid Soils of Farta District, Northwestern Highlands of Ethiopia

Carbono, matéria orgânica leve e fósforo remanescente em diferentes sistemas de manejo do solo

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