Effects of bacterial and fungal inoculants in a loess soil amended with various sources of phosphorus on pea growth and phosphorus uptake.

Xie, Y.H., Hu, Q.C., Hong, J.P., and Zhang, T.Q. (2013). "Effects of bacterial and fungal inoculants in a loess soil amended with various sources of phosphorus on pea growth and phosphorus uptake.", Communications in Soil Science and Plant Analysis, 44(13), pp. 2008-2018. doi : 10.1080/00103624.2012.758280  Access to full text

Abstract

We evaluated the effects of microbial inoculants in a loess soil amended with various phosphorus (P) sources on pea growth and P uptake (PU). Treatments included factorial combinations of three inoculants (non-inoculation, NI; bacteria, BA; and fungi, FU) and three P sources (non-P, NP; calcium-superphosphate, SP; and rock-phosphate, RP). Compared with NI, soils inoculated with BA and FU and added with NP and SP increased pea shoot and total biomass, with greater increases with, BA than with FU. Both BA and FU stimulated root growth, regardless of P addition. Compared to NI, PU with BA increased by 26, 59 and 83% in soils amended with RP, SP and NP, respectively, while with FU it increased by 25% with SP and 48% with NP, with no effects with RP. The results indicate that BA can increase bioavailability of soil P, while FU may promote plant utilization of bio-available P existing in soil.

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