Structural Equation Modeling of Phosphorus Transformations in Soils of Larix principis-rupprechtii Mayr. Plantations

Understanding the soil phosphorus (P) cycle is a prerequisite for sustainable management of land resources. The sequential-extraction method was used to determine P fractions in 513 soils Larix principis-rupprechtii Mayr. plantations. With these data, this study applied structural equation modeling evaluate interaction between various fractions. Quantitative analysis conducted on importance different pools and transformation pathways availability larch plantation. Our showed that soluble inorganic (Pi) directly positively affected by labile Pi, organic (Po), secondary mineral P, primary negatively moderately Po. Soluble Pi not occluded P. (β = 0.40) had greatest total impact followed 0.32) (labile Po, β 0.31), then 0.11), with Po being relatively small −0.06). In summary, reveals important roles transformations determining overall soils, as well extensive effects weathering dynamics L.