Wheat response to PB-50 (Penicillium bilaji), a phosphate-solubilizing inoculant
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Phosphorus is a key plant nutrient which is rapidly precipitated and made unavailable for plant use when added to soil as fertilizer. Every soil contains a number of microorganisms which act to solubilize fixed phosphate making it available for plant uptake. One such microorganism, a fungus called Penicillium bilaji, demonstrated superior phosphate solubilizing ability in liquid media. In greenhouse and field trials established in 1985, 1986, and 1987, bran inoculated with P. bilaji applied in-furrow consistently increased phosphate availability and uptake by crop plants. Penicillium bilaji was subsequently registered in Canada under the trade name PB-50™. Trials were established at 38 locations in 1988 and 1989 to examine the effect of seed inoculated P. bilaji on wheat yield over increasing rates of phosphate fertilizer. In general, P. bilaji treatments exhibited significant yield increases over the lower check rates of phosphate fertilizer. As phosphate fertilizer rates approached -recommended levels, yield differences due to P. bilaji tended to decrease.
Part OfSoils and Crops Workshop
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