Effect of Germanium Foliar Spray Application on Growth Characteristics and Germanium Absorption in Rice

To obtain the basic information for agricultural utilization of germanium (Ge), the growth characteristics and Ge absorption in rice plant were investigated under different Ge concentrations by foliar spray application. The Ge concentrations were treated with 0 (control), 10, 20, 40 and in pot (1 5000 a), respectively. The Ge absorption rate in rice by foliar spray application with in pot was higher in the order of leaf (5.75%) > stem (4.52%) > root ( > > > . When rice was treated with of Ge, the Ge content in rice grain was higher in the order of rice bran () brown rice () polished rice (). By foliar spray application, the Ge uptake in rice bran was higher than that in other parts. Therefore, optimum Ge concentration by foliar spray application was in pot based on the results from the Ge treatments.