据分析稻草含硅量为9—13%,按一亩田产干稻草300公斤计算,约相当于含硅酸钠132公斤。稻草还田以后,显著地为晚稻改善了硅素营养条件,稻株以吸硅量比未施的高2.4%。水稻是一种喜硅作物,硅能提高水稻根系的氧化力,在土壤中亚铁含量过剩的情况下,有减少亚铁进入植株体内的作用。同时能调节体内的氮素和磷素营养,使植株表皮细胞壁硅质化增强,从而提高抗倒、抗病虫的能力。 According to the analysis of rice straw content of 9-13%, according to a mu of dry straw 300 kg field calculation, equivalent to about 132 kg of sodium silicate. After the straw was returned to the field, the condition of silicon nutrition was significantly improved for late rice, and the rice plants were 2.4% higher silicon than the previous ones. Rice is a hi-silicon crop. Silicon can increase the oxidizing power of rice roots. In the case of excess ferrous iron in the soil, it reduces the effect of ferrous iron entering the plant. At the same time can regulate the body’s nitrogen and phosphorus nutrition, plant epidermal cell wall silicification enhanced, thereby enhancing the anti-down, anti-pest ability.