TỔNG HỢP VẬT LIỆU NANO La2O3/SiO2 TRÊN CƠ SỞ TRO TRẤU VÀ La(NO3)3 ỨNG DỤNG LÀM CHẤT KÍCH THÍCH SINH TRƯỞNG CHO CÂY XÁO TAM PHÂN (PARAMIGNYA TRIMERRA (OLIV.) GUILLAUM.)

Tóm tắt

In this study, La₂O₃/SiO₂ material was synthesized and applied as a growth stimulant for Paramignya
trimera (Xáo tam phân) plants, using La(NO₃)₃ and rice husk ash as precursors through the sol-gel method
combined with gamma irradiation. The morphology and structure of the material were confirmed through
various physicochemical characterization methods, including XRD, EDX, IR, SEM, and TEM analyses,
which showed that the La₂O₃/SiO₂ particles had sizes ranging from 50 to 80 nm. The results of the
investigation on the effect of La₂O₃/SiO₂ on the growth and development of Paramignya trimera indicated
that La₂O₃/SiO₂ significantly influenced the plant’s growth. Experimental data demonstrated an increase in
yield by 8 tons per hectare, an average root length increase of 7.3 cm, and a stem height increase of 22 cm
compared to the control sample. Additionally, plants treated with La₂O₃/SiO₂ were sturdier and showed no
signs of leaf yellowing. These findings suggested that La₂O₃/SiO₂ acted as an effective growth stimulant for
Paramignya trimera.