Changes in soil phosphorus availability and associated microbial properties after chicken farming in Lei bamboo (Phyllostachys praecox) forest ecosystems

Abstract

Bamboo‐chicken farming (BCF) is a popular bamboo complex management model in Southeast Asia. However, the effects of BCF on phosphorus (P) availability and associated soil microbial communities remain poorly understood. In this study, we compared the soil properties, P fractions, phosphatase activities, and bacterial community compositions in the surface soil (0–20 cm) of a typical BCF system under different grazing densities [represented as distances of 5, 15, 25, 35, and > 60 m (control site) from the henhouse, respectively]. We observed that total P (Pt) accumulation was more rapid than that of SOC and TN with increasing grazing density. Labile and moderately labile P dominated soil P accumulation under BCF. Resin‐Pi, NaHCO3‐Pi, and 1 M HCl‐Pi increased by 100–233%, 83–183%, and 414–1,314%, respectively, compared with the control. The ratio of labile and moderately labile organic P to the Pt content decreased significantly with increasing grazing density from 38.54% (control) to 17.65% (5 m site). Soil phosphatase activity increased with increasing grazing density, suggesting that BCF effectively promoted the mineralization of soil Po. Inorganic P (Resin‐Pi, NaHCO3‐Pi, and 1 M HCl‐Pi) was positively correlated with Flavobacterium, Pseudomonas, and Arthrobacter but negatively correlated with Burkholderia; this highlights the different functional bacteria involved in P cycling. We conclude that BCF generally increased soil P availability and supply capacity, and the changes in P forms were closely related to changes in soil bacterial community composition. The highly labile P and low C : P ratio under high grazing density conditions may cause soil nutrient imbalance and P leaching.

Contrasting Soil Microbial Functional Potential for Phosphorus Cycling in Subtropical and Temperate Forests

“…Similarly, we found that within the Acidobacteria dominant genus harbored higher abundance of P solubilization and mineralization genes than other genes in both temperature and subtropical forests, especially the genus of Candidatus Solibacter and Terriglobus (Table 2). Bacteria within the Proteobacteria orders Pseudomonadales and Rhizobiales have been characterized as efficient P solubilizers that have the capacity to access smaller and less recalcitrant pool of P in soils [42] on account of their suite of P mineralization and solubilization genes [43]. Consistent with this finding, the identified Bradyrhizobium genus, the branches of Rhizobiales contained higher abundance P solubilization and mineralization genes and P uptake and transport genes (Table 2).…”

Investigation into the Effects of Different Restoration Techniques on the Soil Nutrient Status in Degraded Stipa grandis Grassland

“…Additionally, different restoration methods may also affect the physical and chemical properties of the soil, thereby altering the solubility and availability of potassium and subsequently affecting the soil total potassium content. Root cutting can also increase soil permeability and thus improve the circulation and metabolism of soil organic matter (OM), nitrogen (N) and phosphorus (P) by microorganisms [28,29], The lack of oxygen in soil will greatly limit the development of plant roots and microorganisms [30].…”

Inoculation with phosphate‐solubilizing bacteria alters microbial community and activates soil phosphorus supply to promote maize growth

“…Generally, the soil is enriched in total P but lacks available P. In soil, 95% of P is unavailable (Paola et al, 2019). P is mostly bound to minerals or occurs in organic compounds, and therefore the amount of readily accessible P is a significant constraint on agricultural output (Gai et al, 2021;Li et al, 2022). Replenishment of soil P through fertilization is common in agriculture and forestry, but the long-term sustainability of this practice is questionable (Azeez et al, 2020;.…”