Rangaraj Suriyaprabha, Gopalu Karunakaran, Rathinam Yuvakkumar, Periasamy Prabu, Venkatachalam Rajendran, Narayanasamy Kannan
Centre for Nano Science and Technology, K. S. Rangasamy College of Technology, Tiruchengode, Tamil Nadu, India.
Biotechnol Appl Biochem. 2014 Nov-Dec;61(6):668-75. doi: 10.1002/bab.1191.
The effect of silica nanoparticles and conventional silica sources on the changes in microbial biomass and silica availability to pure soil and maize rhizosphere was studied. Nanosilica (20-40 nm) was synthesized from rice husk and comprehensively characterized. The efficiency of nanosilica was evaluated in terms of its effects on beneficial microbial population such as phosphate solubilizers, nitrogen fixers, silicate solubilizers, microbial biomass carbon and nitrogen content, and silica content in comparison with other silica sources such as microsilica, sodium silicate, and silicic acid. Nanosilica significantly (P < 0.05) enhanced microbial populations, total biomass content (C = 1508 μg g(-1) and N = 178 μg g(-1) ), and silica content (14.75 mg mL(-1) ). Although microsilica sources enhanced factors associated with soil fertility, their use by maize roots and silicification in soil was found to be less. The results show that nanosilica plays a vital role in influencing soil nutrient content and microbial biota and, hence, may promote the growth of maize crop.
研究了二氧化硅纳米颗粒和传统硅源对纯土壤及玉米根际微生物生物量变化和硅有效性的影响。从稻壳中合成了纳米二氧化硅（20 - 40纳米）并进行了全面表征。与其他硅源如微硅粉、硅酸钠和硅酸相比，评估了纳米二氧化硅对有益微生物群体（如解磷菌、固氮菌、解硅菌）、微生物生物量碳和氮含量以及硅含量的影响。纳米二氧化硅显著（P < 0.05）增加了微生物群体、总生物量含量（碳 = 1508微克/克，氮 = 178微克/克）和硅含量（14.75毫克/毫升）。虽然微硅粉源增强了与土壤肥力相关的因素，但发现玉米根系对其利用以及在土壤中的硅化作用较少。结果表明，纳米二氧化硅在影响土壤养分含量和微生物群落方面起着至关重要的作用，因此可能促进玉米作物的生长。
