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[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、180mg/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的株高、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80mg/L时,粳稻株高最矮;当硅浓度为30mg/L时,粳稻的根长最短,跟系数最少;当硅浓度为30mg/L时,叶绿色a、b的含量均最高,且叶绿素a/b值在80mg/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,进而提高粳稻的产量。
[Objective] The research aimed to investigate the effects of different silicon concentrations on the morphological and photosynthetic physiological mechanisms of japonica rice. [Method] Japonica rice seedlings were treated with different concentrations of silicon (0, 30, 80, 130, 180 mg / L sodium silicate solution). The contents of silicon in roots, stems and leaves of rice treated with different concentrations of silicon were measured by molybdenum blue colorimetric method. The plant height, root length and root number of rice treated with different concentrations of silicon were measured by measuring tools. The contents of silicon were determined by acetone extraction The content of chlorophyll a, b and the value of chlorophyll a / b in the leaves and stems of the treatment group. [Result] The highest content of silicon in vegetative organs of Japonica rice was stem> leaf> root. When the concentration of silicon was 80 mg / L, the plant height of japonica rice was the shortest. When the silicon concentration was 30 mg / L, the root length of japonica rice The shortest and the least coefficient. When the concentration of silicon is 30 mg / L, the content of leaf a, b is the highest, and the value of chlorophyll a / b reaches the maximum at 80 mg / L. [Conclusion] Appropriate concentration of silicon could improve the lodging resistance of japonica rice and the photosynthesis efficiency of japonica rice, and then increase the yield of japonica rice.