Root Inoculation With a P-Solubilizing Fungus Alters Growth and P Uptake of Several Greenhouse Crops.

Abstract

<jats:p>Root zone inoculation with P-solubilizing <jats:underline>Penicillium</jats:underline> <jats:underline>bilaji</jats:underline> (PB) has increased P uptake and yields of several field crops. We examined the influence of applying 0 - 5 × 10<jats:sup>5</jats:sup> C.F.U./plant of PB to geranium and petunia grown in the greenhouse in a low P soil amended with rock P. All rates of inoculation increased growth and enhanced flowering of both crops. A second study examined the interaction between PB and rock P amendments in poinsettia. Inoculation with PB accelerated growth through to pinching as did addition of rock P to the media. The combined PB + rock P treatment enhanced bract development resulting in better red color at market time. These results suggest that PB inoculation can enhance growth and/or improve P use efficiency in greenhouse crops.</jats:p>