Effect of silicate solubilizing bacteria and fly ash on silicon uptake and yield of rice under lowland ecosystem

Abstract

A field experiment was conducted in sandy loam soils of eastern farm, Agricultural Engineering College and Research Institute, Kumulur, Tamil Nadu, India to study the effect of silicon on yield and uptake of rice (var. BPT 5204) during Kharif season of 2010-11 by taking the treatment combinations based on graded levels of Fly Ash (FA), Silicate Solubilizing Bacteria (SSB) and Farm Yard Manure (FYM) at fixed fertilizer schedule. The experimental soil (0-15 cm) had pH 7.22; organic C 1.4 %; available Si 66.0 mg kg-1; available N 266.0 kgha-1; available P 14.42 kgha-1 and available K 107.50 kgha-1. The results of graded levels of FA show that all the growth and yield attributes were significantly influenced by silicon uptake. The mean silicon uptake at panicle initiation, straw and grain at harvest varied from 53.8 - 98.7, 105.5 - 197.2 and 21.4- 62.3 kgha-1 respectively, in rice. Number of filled grains per panicle and grain yield displayed conspicuous relationships with content of Si in grains. The highest mean grain yield of 3622 kg ha-1 was recorded by the addition of SSB+FYM followed by FYM (3530 kg ha-1), SSB (3310 kg ha-1) and control (3240 kg ha-1). The combined application of 25 t ha-1 FA with SSB+FYM was recorded the highest grain yield of 3710 kg ha-1 which was 16.3 per cent moreover yield of control. The results further show that 25 t ha-1 FA and SSB+FYM have been proved to be superior treatments for best management of silicon in coastal loamy sand soils under irrigated rice ecosystem.

Silicon-Solubilizing Media and Its Implication for Characterization of Bacteria to Mitigate Biotic Stress

“…The growth of rice plants measured in terms of root-shoot length and dry weight clearly showed the remarkable effect of NBRISN13 and feldspar amendment by increasing the shoot length, number of spikes, and dry weight in all the treatments as compared to control and RS treated plants (Figure 8). The plant growth promoting ability of NBRISN13 was further intensified on feldspar amendment as reported earlier by Peera et al (2016), where, they showed the growth and yield improvement with Si source and silicate solubilizing bacteria. Feldspar treatment has been reported to confer pathogen resistance by providing physical barrier to pathogen infection or the induction of defense (Shen et al, 2010).…”

Silicon Sources and Bacterial Inoculants on Growth Parameters, Leaf Yield, Quality of Coriander (Coriandrum sativum L.) and Soil Adsorbed Silicon in Sandy Loam Soil

“…Whereas, the mean leaf yield was 5.08 g plant -1 only without microbial inoculants. The results obtained by Peera et al, [23] was in corroboration with the current findings. The control without silicon sources and without bacterial showed a minimum leaf yield.…”

“…The results are in accordance with [22] who suggested the improvements of Si content in rice seedlings through the application of rice husk ash (RHA) and other soil organic matters. Peera et al, [23] found that the application of SSB with FYM significantly increased the silicon content in rice.…”

“…Application of calcium silicate as a Si source significantly increases rice and sugarcane yield over the control. Peera et al, [23] found that the application of SSB with FYM significantly increases plant growth. Rosas et al, [28] found that addition of ZSB to sandy loam soil in Argentina boosts wheat production by 36 per cent.…”

The Opportunity of Spent Bleaching Earth (Bentonite) and Silica Solubilizing Bacteria as Silica Source for Induction of Secondary Metabolites Production in Plants

“…In soil, the element Si is primarily present as SiO2, about 50-70% of the mass of the soil, and in various forms of aluminosilicate (Sommer et al, 2006). Although si is abundant in the soil, most of these elements are not available to plants due to the low solubility of the si compounds in the soil (Peera et al, 2016).…”