The effect of silicon (Si) and different types of acid rain (AR) on rice seedling roots was elucidated. The results showed different types of AR had different effects. Nitrate AR at pH 3.0 could promote the growth of rice roots, increased the dry weight, improved root phenotype, boosted H₂O₂ contents and increased peroxidase, catalase and ascorbate peroxidase activities. Sulfate AR at pH 3.0 could significantly inhibit the growth of rice roots, decreased the dry weight, root phenotype, increased H₂O₂ content and autioxidant enzyme activities. Sulfate-nitrate AR at pH 3.0 spraying had no significant effect on rice roots. Under different types of AR stress, the addition of exogenous Si could significantly promote the growth of rice seedling roots. This results indicated that the effects of rice root caused by AR might be due to not only the types of AR but also the content of Si in soil.

阐明了硅（Si）和不同类型的酸雨（AR）对水稻幼苗根系的影响。结果表明，不同类型的AR具有不同的作用。pH 3.0的硝酸盐AR能促进水稻根系的生长，增加干重，改善根表型，提高H ₂ O ₂含量并增加过氧化物酶，过氧化氢酶和抗坏血酸过氧化物酶的活性。pH 3.0的硫酸盐AR可以显着抑制水稻根系生长，降低干重，根系表型，增加H ₂ O _2。含量和抗氧化酶活性。喷施pH 3.0的硫酸亚硝酸盐AR对水稻根系无显着影响。在不同类型的AR胁迫下，外源硅的添加可以显着促进水稻幼苗根系的生长。该结果表明，AR引起的水稻根系效应可能不仅与AR的类型有关，还与土壤中Si的含量有关。