Molecular Soil Biology 2024, Vol.15, No.2, 59-70 http://bioscipublisher.com/index.php/msb 65 Figure 2 Common microorganisms in biofertilizers (Adapted from Ortiz and Sansinenea, 2022) 7 Case Studies 7.1 Enzymatic activities in composting systems The addition of biochar and compost to soils has been shown to significantly influence enzymatic activities, which are crucial for microbial decomposition processes. For instance, a study on sulfamethoxazole-polluted wetland soil demonstrated that biochar and compost amendments could enhance enzymatic activities such as dehydrogenase and urease, thereby improving the degradation efficiency of pollutants (Liang et al., 2019). Similarly, the application of biochar and vermicompost in greenhouse soils increased the activities of urease and alkaline phosphatase, which are essential for nutrient cycling and soil health (Figure 3) (Wu et al., 2023). These findings highlight the potential of organic amendments to boost enzymatic activities and improve soil quality. Figure 3 Effects of different treatments on enzyme activity in greenhouse soil (Adapted from Wu et al., 2023) Image caption: CK: Untreated control group; BC1: Addition of 1% biochar; BC3: Addition of 3% biochar; BC5: Addition of 5% biochar; VC3: Addition of 3% vermicompost; VC5: Addition of 5% vermicompost (Adapted from Wu et al., 2023) The study by Wu et al. (2023) shows that the application of biochar (BC1, BC3, BC5) and vermicompost (VC3, VC5) significantly increases the activity of urease and nitrate reductase in soil, while having a lesser impact on alkaline phosphatase. Notably, the high-dose vermicompost treatment (VC5) significantly enhanced urease activity, indicating the potential of vermicompost in promoting nitrogen transformation. Additionally, biochar treatments also demonstrated an ability to improve soil enzyme activity, especially at higher doses (BC5) (Figure 3). This suggests that the appropriate application of biochar and vermicompost can enhance soil enzyme activity, thereby improving soil fertility and crop yield.
RkJQdWJsaXNoZXIy MjQ4ODYzMg==