Does Straw Returning Amended with Straw Decomposing Microorganism Inoculants Increase the Soil Major Nutrients in China’s Farmlands?

Although straw-decomposing microbial inoculants (SDMI) are capable to generally promote the fertility of straw-amended soils, their impact on release individual soil major nutrients remains controversial. Additionally, combined effects SDMI and environment/management various forms remain poorly documented. To fill these research gaps, we conducted a meta-analysis study using 1214 paired observations from 132 field trials in China. Our results showed that significantly increases total available concentrations nitrogen, phosphorus, potassium (p < 0.05), although varied with different conditions. Moreover, mean annual precipitation (MAP) had significant correlations SDMI-amended straw nitrogen = 0.008) 0.0006). The effect phosphorus was mainly correlated organic matter 0.032) MAP 0.049), respectively. findings indicate can have measurable status nutrients. In particular, application rice an initial C/N ratio ?15 neutral soils temperate subtropical monsoon climates is promising strategy.