氟对水稻生长及铝?氟交互对水稻吸氟规律的影响研究

通过盆栽试验研究水稻对氟的吸收规律及硫酸铝存在对水稻吸氟量的影响。结果表明: 单施氟处理下, 施氟量与水稻植株含氟量间存在极显著正相关关系, 说明水稻对氟存在奢侈吸收。随着水稻的生长, 其对氟的吸收达到平衡, 吸氟量逐渐减少, 植株体内氟含量呈下降趋势。各施氟水平下, 水稻植株的生长无明显差异, 但分蘖数却随施氟量的增加呈极显著降低趋势。铝?氟交互条件下, 水稻植株各部位的含氟量顺序为稻壳>米>根>茎叶, 这可能与植物的吸氟部位和氟的吸收形态有关。植株体内氟含量随生长时间的延长也呈下降趋势, 施硫酸铝处理会在此基础上进一步降低水稻植株各部位的含氟量, 但同一处理在不同时间取样, 降氟效果有较大差别。氟、铝处于何种比例和作用时间才能达到理想的降氟效果还有待于进一步研究。

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.