不同硅浓度对粳稻形态和光合生理机制的影响  

Effects of Silicon in Different Concentrations on Morphology and Photosynthetic Physiological Mechanism of Japonica Rice

作　　者：陈亮[1] 丁枫[1] 蔡丽萍[1] 周彬 石妍[1] 占怡玉[1] 范智权[1] 王淑琼[1] 饶梦[1] 

机构地区：[1]湖北师范学院生命科学学院,湖北黄石435002 [2]湖北省广播电视大学阳新分校,湖北阳新435200

出　　处：《安徽农业科学》2012年第31期15100-15102,15110,共4页Journal of Anhui Agricultural Sciences

基　　金：湖北省教育厅优秀中青年人才项目(Q20102501)

摘　　要：[目的]为了探究不同硅浓度对粳稻形态和光合生理机制的影响。[方法]用不同硅浓度(0、30、80、130、180 mg/L硅酸钠溶液)处理粳稻幼苗。采用钼蓝比色法测定不同硅浓度处理组水稻根、茎、叶的硅含量,使用测量工具测量不同硅浓度处理组水稻株高、根长、根系数目,采用丙酮提取法测定不同硅浓度处理组水稻叶、茎的叶绿素a、b的含量以及叶绿素a/b值。[结果]粳稻营养器官中硅含量从高到低依次是茎>叶>根;当硅浓度为80 mg/L时,粳稻株高最矮;当硅浓度为30 mg/L时,粳稻根长最短,根系数最少;当硅浓度为30mg/L时,叶绿素a、b的含量均最高,且叶绿素a/b值在硅浓度为80 mg/L时达到最大值。[结论]适当的硅浓度可提高粳稻的抗倒伏性以及粳稻的光合作用效率,进而提高粳稻产量。[Objective] The aim was to explore the effects of silicon in different concentrations on morphology and photosynthetic physiological mechanism of japonica rice.[Method] Seedlings of japonica rice were treated with silicon in different concentrations（0,30,80,130 and 180 mg/L）.Silicon contents were measured with molybdenum blue spectrophotometric method in root,stem and leaf.Plant height,length and number of root system in different treatment groups were measured with tools.Chlorophyll a and b,and a/b in leaf and stem of rice in different groups were measured.[Result] Silicon contents in vegetative organs were as follows： stemleafroot.When silicon concentration was at 80 mg/L,plant height of japonica rice was the shortest.When silicon concentration was 30 mg/L,root length of the rice was the shortest and root number was the least.When silicon concentration was 30 mg/L,the contents of chlorophyll a and b were the highest and chlorophyll a/b achieved the peak when silicon concentration was at 80 mg/L.[Conclusion] Silicon at proper concentration would improve lodging-resistance and the efficiency of photosynthesis,and enhance the yield of japonica rice.

关 键 词：粳稻 硅浓度 形态特征 光合作用效率 

分 类 号：S511.22[农业科学—作物学]