Growth and F absorbing of rice under F and Al-F interaction

This paper researched the rule of fluoride absorbing of rice and the influence of aluminum sulfate on the absorption of fluoride by rice plant under different fluoride concentrations through a pot experiment. The results showed that, in the treatment of applying fluoride solely, there was a significant positive correlation between concentration of applied fluoride and fluorine content of rice plant indicating an extravagant absorption of fluorine by rice plant. The content of fluorine in rice plant decreased with the growing time, which resulted from the decreased fluorine absorption. No significant difference in the growth of rice plants was observed among different treatments of applied fluoride amount, while the number of tillers was significantly reduced with increasing of the concentrations of applied fluoride. Under Al-F interaction, the order of fluorine content in various parts of rice plant was hull > rice > root > stem and leaf. This may be related with different fluoride absorbing parts and forms of fluoride absorbed. Under no aluminum sulfate, the contents of fluorine in different parts of rice plant already had showed decreasing tendency with the growing time. This tendency was enhanced by additional application of aluminum sulfate. However, greater difference in fluorine-reducing effects existed among different rice growth times even under the same treatment of aluminum sulfate. So, the proportion of aluminum and fluorine, Al-F interacting time to achieve the best effect of reducing fluoride should be further researched.