Phosphate-solubilizing bacteria and fungi in relation to phosphorus availability under different land uses for some latosols from Guangdong, China

Abstract

Some soil bacteria and fungi are known to solubilize phosphates and play an important role in supplyingphosphorus (P) to plants. In this study, we characterized the phosphate-solubilizing bacteria and fungi as well asP availability in latosols from southern China under different land use practices. Three different latosols (i.e., redsoil, lateritic red soil and laterite red soil), each with four different land uses (i.e., agricultural land, grass land,forest land and orchard land), from Guangdong Province, China, were chosen to determine the amounts ofphosphate-solubilizing bacteria (PSB) and phosphate-solubilizing fungi (PSF) and their phosphate solubilizingabilities. Our results show that the amount of available P (AP) increased with the amount of PSB favored insolubilizing organic P (or PSBop), while the amount of PSF increased with the content of soil organic carbon(SOC). The average rates of phosphate solubilization were 28.23% for PSBop, 6.97% for PSF, and 0.16% forPSBip (PSB favored in solubilizing inorganic P). An increase in soil pH decreased the ability of PSB to solubilizephosphate in latosols. This ability occurred in the following order: PSBop > PSF > PSBip. No significantdifference in the amount of PSF was observed among the four different land uses for the lateritic red soil andlaterite red soil, whereas a profound significant difference was found for the red soil, with the highest number ofPSF in the grass land. Reasonable linear correlations between the PSB and the AP and between the PSF and theSOC were obtained and could provide a good reference to characterize soil PSB and PSF. Additionally, PSBopwas the best bacterial species to solubilize phosphate in the latosols.

Citation

Zhang, Jiaen; Feng, Lifang; Ouyang, Ying; Hu, Rongrong; Xu, Huaqin; Wang, Jiaxin. 2020. Phosphate-solubilizing bacteria and fungi in relation to phosphorus availability under different land uses for some latosols from Guangdong, China. CATENA. 195: 104686-. https://doi.org/10.1016/j.catena.2020.104686.