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以水稻品种汕优63为材料,在田间土培条件种植下,采用不同浓度、不同形态砷溶液处理,探讨砷对苗期水稻光合生理特性的影响。结果表明,砷处理后降低了水稻光合作用参数(净光合速率、细胞间隙CO2浓度、蒸腾速率、气孔导度、气孔限制值、叶绿素含量等),且随着砷浓度的升高,其参数下降幅度增大。水稻形态指标测定结果表明,砷处理导致水稻根长、株高增长缓慢,植株干质量积累减少。同时本研究还发现不同形态砷(无机砷、有机砷)处理水稻后,以无机砷对水稻光合特性的影响作用较大。
With Shanyou 63 as material, the effects of arsenic on photosynthetic physiological characteristics of rice at seedling stage were studied under the conditions of soil culture under field cultivation with different concentrations of arsenic solution. The results showed that the arsenic treatment reduced the parameters of photosynthesis (net photosynthetic rate, intercellular CO2 concentration, transpiration rate, stomatal conductance, stomatal limitation, chlorophyll content, etc.) and decreased with the increase of arsenic concentration Amplitude increases. The results of morphological index of rice showed that the arsenic treatment led to the slow growth of root length and plant height and the decrease of plant dry weight accumulation. At the same time, this study also found that different forms of arsenic (inorganic arsenic, organic arsenic) treatment of rice, inorganic arsenic on photosynthetic characteristics of rice.