Preparation and Foliar Application of Oligochitosan - Nanosilica on the Enhancement of Soybean Seed Yield

Dang Van Phu, Bui Duy Du, Le Nghiem Anh Tuan, Hoang Van Tam, Nguyen Quoc Hien
2017 International Journal of Environment Agriculture and Biotechnology  
Oligochitosan with weight average molecular weight (Mw) of 5000 g/mol was prepared by gamma Co-60 radiation degradation of 4% chitosan solution containing 0.5% H2O2 at 21 kGy. Nanosilica with size of 10 -30 nm was synthesized by calcination of acid treated rice husk at 700 o C for 2 h. The mixture of 2% oligo-chitosan2% nanosilica was prepared by dispersion of nanosilica in oligochitosan solution. Oligochitosan, nanosilica and their mixture were characterized by gel permeation chromatography
more » ... on chromatography (GPC), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive x-ray spectroscopy (EDX), Ultraviolet-visible spectroscopy (UV-Vis), and Furrier transform infrared spectroscopy (FT-IR). Effect of foliar application of oligochitosan and oligochitosannanosilica on soybean seed yield was conducted in experimental field. Results indi-cated that soybean seed yield increased 10.5 and 17.0% for oligochitosan and oligochitosannanosilica, respect-tively for the control. Radiation degraded oligochitosan and its mixture with nanosilica can be potentially used for cultivation of soybean with enhanced seed yield.
doi:10.22161/ijeab/2.1.53 fatcat:vjqz2l7ozjc5vcaay32yiwnb64