Tchienkoua, . and Zech, Wolfgang and Sanginga, Nterangya (2010) Inorganic phosphorus fractions dynamics following phosphorus aplication on maize in acid soils. American-Eurasian Journal Agricultual & Environmetal Science, 8 (6). pp. 793-800.
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Abstract
Soil properties influence phosphorus partitioning into functional pools and plant response to fertilizer application. A greenhouse experiment was conducted using three acid soils from southern Cameroon in order to i) have a better understanding of soil properties interactions with inputted P on maize performance and ii) assess changes in conceptual inorganic soil P pools . The soils which classified as Typic Kandiudox (TKO), Rhodic Kandiudult (RKU) and Typic Kandiudults (TKU) received 5 P rates ranging from 0 to 198.6 mg P potG1. Soil characterization revealed great differences in terms of physical soil properties and inorganic conceptual P pools. For all soils, NaHCO -Pi represented less than 2 % of total inorganic P (TIP) while NaOH-Pi and H SO - 3 2 4 Pi pools emerged as the largest accounting for 13.2 and 85.1% of TIP, respectively. The observed P pools trend in the order HCl-Pi<NaHCO -Pi<NaOH-Pi <H SO -Pi confirmed the Walker and Syers model of P transformation 3 2 4 over time. All soils were P-responsive with dry matter yield (DMY) increasing in the order TKU>RKU>TKO. Phosphorus fertilization induced differential increases in inorganic P pools with exponential models best explaining the dynamics of NaHCO -Pi pool with R between 0.87 and 0.94. The HCl-P showed no consistent 3 2 trend while NaOH-Pi and H SO -Pi as the most enriched pools followed linear models. Soil plant-system 2 4 ordination through principal component analysis indicated that Ca and other basic cation levels influenced significantly P and N uptake and photosynthate allocation
| Item Type: | Article |
|---|---|
| Author Affiliation: | Institute of Agricultural Research for Development P.O. Box 2067 Yaoundé, Cameroon |
| Subjects: | Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Maize |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 03 Jan 2011 20:02 |
| Last Modified: | 03 Jan 2011 20:02 |
| Official URL: | http://www.idosi.org/aejaes/jaes8(6)/27.pdf |
| URI: | http://eprints.icrisat.ac.in/id/eprint/1214 |
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