Phosphorus dynamics in trial floodplain soils of Bangladesh - Hoque, Md. Fazlul
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Sound P fertilizer management and maximum efficiency, insists on adequate understanding of P-soil interactions. Max.P adsorption capacity ranged from 1250 1834 µg g-1. Energy of adsorption varied from 0.223-1.00 µg ml 1, P buffering capacity ranged from 139-243 and P saturation ranged from 0.27-1.59 µmol g-1. Acid although extracted the highest amount of both native and applied P, showed the poorest relationship with relative dry matter and P uptake by rice. The critical level for Olsen P was found 5 mg kg 1 for the coastal soils of Bangladesh. Tidal floodplain soils, on an average of 12…mehr

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Produktbeschreibung
Sound P fertilizer management and maximum efficiency, insists on adequate understanding of P-soil interactions. Max.P adsorption capacity ranged from 1250 1834 µg g-1. Energy of adsorption varied from 0.223-1.00 µg ml 1, P buffering capacity ranged from 139-243 and P saturation ranged from 0.27-1.59 µmol g-1. Acid although extracted the highest amount of both native and applied P, showed the poorest relationship with relative dry matter and P uptake by rice. The critical level for Olsen P was found 5 mg kg 1 for the coastal soils of Bangladesh. Tidal floodplain soils, on an average of 12 samples, contained 887 mg kg-1 of total P of which only 0.01% remained in solution form, 1.84% in NaHCO3 extractable, 4.24% in NaOH extracted Pi fraction, 46.65% in NaOH Po, 28.19% in acid pool and 18.97% in residual pool. Continuous rice cultivation without P application, decreased the conc. of labile P, moderately labile P and stable P but with the addition of P increased the labile and moderately labile P. The labile P and stable P estimated through plant based approach explained the variability of relative dry matter yield of rice and P uptake better than the soil test approach.
Autorenporträt
Mr. Md. Fazlul Hoque, Assistant Professor, Dept. of Mathematics, Pabna Science & Technology University, Pabna, Bangladesh. Born 4th February,1982 in Lalmonirhat.Studied B.Sc(Hons), M.Sc. and M.Phil from Rajshahi University in pure mathematics. Founder president of University Blood Donation Club. Awarded A. F. M. Rahman Gold Medal in 2009.