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盆栽试验结果表明,在高铁、高锰胁迫下硅对水稻生理特性、生长发育和产量有明显的正效应。高浓度铁、锰和低浓度硅组合,水稻根系活力和SOD酶活性最差,丙二醛(MDA)含量最高。相反,低浓度铁、锰和高浓度硅处理,水稻相应的生理指标均高。高硅低铁锰组合和高硅高铁低锰组合,较对照分别增产15.2%和3.4%;高铁、锰组合不施硅肥较对照减产72.7%;低铁、锰组合不施硅肥较对照减产20.5%;高铁、高锰胁迫下施用硅肥增产20.5%~72.7%,盆栽条件下硅肥适宜用量(SiO2)为0.3~0.6 mg.kg-1。田间条件下水稻硅肥的适宜用量为450~900 kg.hm-2,平均增产10.7%,平均增收659元.hm-2。
Pot experiments showed that silicon had a significant positive effect on physiological characteristics, growth and yield of rice under high-iron and high-manganese stress. High concentrations of iron, manganese and low concentrations of silicon combinations, rice root activity and SOD activity of the worst, highest malondialdehyde (MDA) content. In contrast, low concentrations of iron, manganese and high concentrations of silicon treatment, the corresponding physiological indicators of rice are high. High-silicon low-iron-manganese combination and high-silicon high-iron low-manganese combination increased 15.2% and 3.4% respectively compared with the control; high-speed rail and manganese combination did not apply silicon fertilizer to reduce yield 72.7% compared with the control; 20.5%, respectively; silicon fertilization increased 20.5% -72.7% under high-iron and high-manganese stress, and 0.3-0.6 mg.kg-1 for silicon fertilizer under potted condition. The suitable amount of silicon fertilizer for rice was 450 ~ 900 kg.hm-2 under field conditions, with an average yield of 10.7% and an average increase of 659 yuan.hm-2.