Properties of phosphorus-mobilizing bacteria and their effect on cereal crop yields on sod-podzolic loamy sand soils | Свойства фосфатмобилизующих бактерий и их влияние на урожайность зерновых культур на дерново-подзолистых супесчаных почвах
2011
Mikhajlovskaya, N.A. | Mikanova, O. | Barashenko, T.B. | Tarasyuk, E.G. | Dyusova, S.V., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
In the conditions of the Republic of Belarus there was studied the potential activity of phosphate-mobilization and stimulation of growth of isolates of P-mobilizing bacteria in laboratory experiments. Also there was analysed their influence on yielding capacity of wheat (Triticum aestivum) in the field conditions of sod-podzolic sandy loam soil. P-mobilizing bacteria capabilities of transfer the insoluble Ca3(P04)2 into accessible form and stimulation of root development determine their positive effect on nutrition regime and crop yields. The efficiency of P-mobilizing bacteria introduction was found to depend on the content of mobile of phosphorus in soil. Under sod-podzolic loamy sand (coarse) soil supply by P2O5207 mg/kg-1 most effective was introduction of P-mobilizing bacteria at the backgrounds of N120Kg90and N120Kg90P10 that provided winter triticale yields 46.5-48.0 c/ha-1 and reliable responses to inoculation 3.0-3.3 c/ha-1; under soil supply by P2O5 244 mg/kg-1 grain response 2.3 c/ha-1 was obtained only at background of N120K90; in a range of soil supply by P2O5 286-394 mg kg-1 grain responses was not statistically sound. Application of P-mobilizing bacteria on sod-podzolic loamy sand (bind) soil was most effective if mobile phosphates contents were in diapason of 200-400 mg kg-1 at the backgrounds of N60K90 that resulted in spring wheat responses 4.3-4.7 c/ha-1; at the backgrounds of N60P30K90grain response 3.6 c/ha-1 was obtained only if P205 content in soil not exceed 200 mg/kg-1. Under high soil supply by mobile phosphates the introduction of P-mobilizing bacteria is not profitable.
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