Immediate and Residual Effects of Lime and Phosphorus Fertilizer on Soil Acidity and Maize Production in Western Kenya

Kisinyo, P. O.; Othieno, C. O.; Gudu, S.; Okalebo, J. R.; Opala, P. A.; Ng’etich, W. K.; Nyambati, Robert Orangi; Ouma, Evans Ochieng; Agalo, Jerry; Kebeney, S. J.; Too, Emily J.; Kisinyo, Joyce; Opile, Wilson

doi:10.1017/s0014479713000318

Cited by 58 publications

(44 citation statements)

References 21 publications

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“…There was no significant interaction between lime and phosphorus application rates on available P. The effect of lime was also not significant but available P increased with increasing P rates for a given lime rate. Generally, the available P levels were low even after application of fertilizers and lime, therefore confirming that P was deficient in this soil and that some of the applied P could also have been fixed since most of the soils in western Kenya are known to have high P fixation capacities [22,23]. It was only at high rates of P application (100 kg ha −1 ) with high lime rates of 10 or 20 t ha −1 that the available P exceeded the critical value of 10 mg kg −1 that has been reported to be adequate for maize production [24].…”

Section: Available Phosphorusmentioning

confidence: 61%

Influence of Lime and Phosphorus Application Rates on Growth of Maize in an Acid Soil

Opala

2017

Advances in Agriculture

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The interactive effects of lime and phosphorus on maize growth in an acid soil were investigated in a greenhouse experiment. A completely randomized design with 12 treatments consisting of four lime levels, 0, 2, 10, and 20 t ha −1 , in a factorial combination with three phosphorus rates, 0, 30, and 100 kg ha −1 , was used. Maize was grown in pots for six weeks and its heights and dry matter yield were determined and soils were analyzed for available P and exchangeable acidity. Liming significantly reduced the exchangeable acidity in the soils. The effect of lime on available P was not significant but available P increased with increasing P rates. There was a significant effect of lime, P, and P by lime interactions on plant heights and dry matter. Without lime application, dry matter increased with increasing P rates but, with lime, dry mattes increased from 0 to 30 kg P ha −1 but declined from 30 to 100 kg P ha −1 . The highest dry matter yield (13.8 g pot −1 ) was obtained with a combined 2 t ha −1 of lime with 30 kg P ha −1 suggesting that lime application at low rates combined with moderate amounts of P would be appropriate in this soil.

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Section: Available Phosphorusmentioning

confidence: 61%

Influence of Lime and Phosphorus Application Rates on Growth of Maize in an Acid Soil

Opala

2017

Advances in Agriculture

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“…Lesser increases in pH under TSP are attributable to its negligible CaCO 3 equivalency and lower Ca content (12-14%) compared to Minjingu PR (27%) (Havlin et al 2013;Savini et al 2016;Szilas et al 2007b). Liming of weathered soils in western Kenya can improve the availability of native and added P by reducing exchangeable Al 3+ and elevating soil pH (Kisinyo et al 2014(Kisinyo et al , 2015. Thus, Minjingu PR offers benefits beyond recapitalization of soil P for weathered soils in western Kenya.…”

Section: Liming Effects Of P Fertilizersmentioning

confidence: 99%

Biological P cycling is influenced by the form of P fertilizer in an Oxisol

et al. 2017

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Phosphate rock (PR) is an alternative fertilizer to increase the P content of P-deficient weathered soils. We evaluated the effects of fertilizer form on indicators of biological cycling of P using an on-farm trial on a Rhodic Kandiudox in western Kenya. Treatment plots were sampled after 13 cropping seasons of P applications as Minjingu phosphate rock (PR) or as triple super phosphate (TSP) (50 kg P ha −1 season −1 ), as well as a P-unfertilized control (0 kg P ha −1 season −1 ). Soils (0-15 and 15-30 cm) were analyzed for microbial biomass P (P mic ), activities of acid phosphomonoesterase, alkaline phosphomonoesterase, and phosphodiesterase, and sequentially extractable P fractions. P additions as Minjingu PR yielded 299% greater P mic than TSP at 0-15-cm depth despite similar labile P concentrations in the two P fertilization treatments and stimulated activities of acid phosphomonoesterase (+39%). When added in the soluble form of TSP, a greater percentage of total soil P was present in mineral-bound forms (+33% Fe-and Al-associated P). Higher soil pH under Minjingu PR (pH 5.35) versus TSP (pH 5.02) and the P-unfertilized treatment (pH 4.69) at 0-15-cm depth reflected a liming effect of Minjingu PR. The form of P fertilizer can influence biological P cycling in weathered soils, potentially improving P availability under Minjingu PR relative to TSP via enhanced microbial biomass P and enzymatic drivers of P cycling.

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“…With liming, added carbonate (CO 3 2− ) is readily hydrolyzed and produces hydroxide ions (OH − ), increasing soil solution pH. This severely impairs Al oxide activity reduces the ability of the oxide surfaces to retain P and consequently increases P availability [11]. The second way is a more generous P applications to addresses the low P availability rather than addressing the root of the problem but it is not economical.…”

Section: Introductionmentioning

confidence: 99%

Fractionation and availability of phosphorus in acid soils of Hagereselam, Southern Ethiopia under different rates of lime

Kiflu

Beyene

Schoenau

2017

Chem. Biol. Technol. Agric.

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Background: Phosphorus (P) availability is commonly assumed to limit productivity in many tropical soils, yet there is relatively little information on the phosphorus chemical forms, distribution, and transformations that P undergoes in Ethiopian soils. We used a sequential fractionation scheme to assess phosphorus fractions of acid soils of Southern Ethiopia. The study area called Hagereselam is characterized by high soil acidity, and the availability of P in the study area is relatively low. As crop production in Ethiopia is dominated by low external input practices, native P remains the main contributor to plant P nutrition in many locations.Result: Although the total P concentration is 829.7 mg kg −1 , the organic P content was relatively low (58 mg kg −1 ) and constituted on average less than 7% of the total P. The ratio of organic carbon to organic P was generally greater than 240, suggesting the potential for immobilization of P. The Al + Fe-associated P was the dominant inorganic P pool. The majority of the P occurred in recalcitrant form (568.3 mg kg −1). Readily available, exchangeable phosphate, as extracted by anion-exchange resin membranes, was present in very low concentrations (3.3 mg kg −1 ); moreover, labile P accounted for less than 2% (9.9 mg kg −1 ) of the total soil P. Conclusion:Lime was used as a reclamation material for acid soils, and the application of lime significantly affected the different P fractions and was involved in the transformation of P fraction. Organic P forms were significantly lower for higher levels of lime application, suggesting that lime amendment enhanced organic P decomposition. Moreover, application of lime increased Ca-P and decreased Al + Fe-P for acid soils.

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Immediate and Residual Effects of Lime and Phosphorus Fertilizer on Soil Acidity and Maize Production in Western Kenya

Cited by 58 publications

References 21 publications

Influence of Lime and Phosphorus Application Rates on Growth of Maize in an Acid Soil

Influence of Lime and Phosphorus Application Rates on Growth of Maize in an Acid Soil

Biological P cycling is influenced by the form of P fertilizer in an Oxisol

Fractionation and availability of phosphorus in acid soils of Hagereselam, Southern Ethiopia under different rates of lime

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