Differential Effects of Inoculation with Earthworms and Phosphate-Solubilizing Bacteria on Phosphorus Adsorption Capacity of Soils with Different Phosphorus Contents
Due to the strong fixation and weak mobility of phosphorus (P) in the soil, P fertilizers can easily be left behind in the soil, which greatly increases the environmental pressure. To find a green and environmentally friendly method of P activation, this study evaluated the effects of inoculation wi...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/15/3/659 |
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| Summary: | Due to the strong fixation and weak mobility of phosphorus (P) in the soil, P fertilizers can easily be left behind in the soil, which greatly increases the environmental pressure. To find a green and environmentally friendly method of P activation, this study evaluated the effects of inoculation with earthworms and phosphate-solubilizing bacteria (PSB) on the adsorption and desorption in low-phosphorus (LP) and high-phosphorus (HP) soils substrates. In LP soils, inoculation with earthworms or (and) PSB reduced the maximum P adsorption, P adsorption affinity constant and maximum buffering capacity by 3–12%, 7–19% and 10–28%, respectively, while the readily desorbed P, degree of P saturation and desorption rates were significantly higher in the inoculated treatments. In HP soils, treatments inoculated with earthworms significantly increased the P adsorption affinity constants (16–22%) and maximum buffer capacity (8–16%) and decreased the adsorption saturation and desorption rates compared to no inoculum. The results indicate that inoculation with earthworms or (and) PSB can effectively reduce the P adsorption capacity and increase the P desorption capacity of LP soils, thus increasing the available P content. However, in HP soils, inoculation with earthworms increased the P adsorption capacity and reduced the risk of P losses due to high-P soil content. |
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| ISSN: | 2073-4395 |