Saline-alkali soil contains excessive sodium carbonate (Na2CO3) and sodium bicarbonate (NaHCO3), which inhibits most plant growth and development. The tradition fossil fuel is getting shortage and leads to a lot of environment problems, The development of renewable energy sources is urgently needed. Sweet sorghum (Sorghum bicolor L.) is characterized by drought and flood resistance, salt tolerance and high efficiency of biomass accumulation. It is considered to be one of the most promising bio-energy crops....