IET Nanobiotechnol. 2013 Sep;7(3):70-7. doi: 10.1049/iet-nbt.2012.0048.
The study was aimed at evaluating the effect of nanosilica and different sources of silicon on soil properties, total bacterial population and maize seed germination. Nanosilica was synthesised using rice husk and characterised. Silica powder was amorphous (50 nm) with >99.9% purity. Sodium silicate treated soil inhibited plant growth promoting rhizobacteria in contrast to nanosilica and other bulk sources. Surface property and effect of soil nutrient content of nanosilica treatment were improved. Colony forming unit (CFU) was doubled in the presence of nanosilica from 4 × 105 CFU (control) to 8 × 105 CFU per gram of soil. The silica and protein content of bacterial biomass clearly showed an increase in uptake of silica with an increase in nanosilica concentration. Nanosilica promoted seed germination percentage (100%) in maize than conventional Si sources. These studies show that nanosilica has favourable effect on beneficial bacterial population and nutrient value of soil.
本研究旨在评估纳米硅和不同硅源对土壤性质、总细菌种群和玉米种子萌发的影响。使用稻壳合成了纳米硅，并对其进行了表征。硅粉为无定形（50nm），纯度大于 99.9%。与纳米硅和其他块状来源相比，硅酸钠处理的土壤抑制了植物促生根际细菌的生长。纳米硅处理改善了土壤表面性质和养分含量。在纳米硅的存在下，菌落形成单位（CFU）增加了一倍，从每克土壤 4×105CFU（对照）增加到 8×105CFU。细菌生物量的硅和蛋白质含量清楚地表明，随着纳米硅浓度的增加，硅的吸收量增加。纳米硅促进了玉米种子萌发率（100%），优于传统的硅源。这些研究表明，纳米硅对有益细菌种群和土壤养分价值具有有利影响。
