Release of Silicon From Silicate Materials and Its Uptake by Rice Plant

Abstract

Plants absorb silicon (Si) from soil solution in the form of monosilicic acid, also called orthosilicic acid (H 4 SiO 4 ). Application of organic and inorganic materials containing readily soluble Si can increase Si supply in the soil and its uptake by plant. The study aimed to evaluate the release of Si from organic and inorganic material sources and its uptake by rice plant. The released phosphorus (P) from those materials was also evaluated. The inorganic materials evaluated included fly ash, steel slag, silica gel and Japanese silica gel (JSG), while the organic materials consisted of rice husk ash (RHA), rice husk burnt (RHB), media of mushroom (MM), cacao shell biochar (cacao SB) and rice straw compost (RSC). The dynamics of Si and P were observed by periodical samplings at 7, 17, 24 and 34 days after transplanting (DAT). Tiller number and plant height were measured at 16, 21 and 36 DAT. The results showed that Si concentration in solution derived from inorganic material was highest for JSG followed by silica gel (1.107 and 0.806 mmol L -1 , respectively). The release of Si from organic material was higher for RHB and RHA (0.618 and 0.539 mmol L -1 , respectively). Cacao SB, silica gel, JSG and RHB significantly increased plant height at 36 DAT. Meanwhile, Si materials did not significantly affect the tiller number. Of the materials used, steel slag and JSG significantly affected Si uptake by rice plant.[Keywords: rice, silicate materials, silicon, silicon uptake] ABSTRAK Tanaman menyerap silikon dari larutan tanah dalam bentuk asam monosilikat, yang juga disebut asam ortosilikat (H 4 SiO4

Trass Effect as a Source of Silicon on Soil, Hay, Husk and Growth of Rice Plants

“…This can be caused by the very high Fe content in Vertisols compared to the other two types of soil. The rice husk is usually around 10%, but in this study, it produced up to 38.77%, therefore the return of plant residues to the soil can help restore Si which has been lost during planting [26,27,28]. The harvest of 5 tons of grain ha-1, 4.5 tons of straw and husks covers 30% of the grain weight, in hence in one harvest in the rice fields of Lembur Leutik hamlet (behind the Darmaga IPB campus, West Java) 971 kg of SiO2 will be transported ha -1 [29].…”

Effect of Silicate Fertilizer on the Growth and Yield of Two Local Indonesian Varieties of Rice (Oryza sativa L.)

“…Depletion of Si in the soil might be one of factors that may contributing the declined of rice yield (Meena et al 2014;Ma 2004;Lian, 1995;Ma et al 1989). There are lots of evidence of the role of Si on agricultural land was reported from around the world (Carrasco-Gil et al 2018;Cuong et al 2017;Anggria et al 2016;Abe et al 2016;Gautam et al 2016;Klotzbucher et al 2013;Hattori et al 2005;Savant et al 1997a;1997b). The use of silicates provides an advantage on rice yields had been reported by Sharma in Dikshit et al (2001).…”