1Faculty of Agronomy, University of Agriculture and Forestry, Hue University, 102 Phung Hung, Hue City, Vietnam
2Thua Thien Hue College of Pedagogy, Hue City, Vietnam
*Corresponding Author: T.T.H. Hoang, Faculty of Agronomy, University of Agriculture and Forestry, Hue University, 102 Phung Hung, Hue City, Vietnam, Email: htthoa@hueuni.edu.vn
Online published on 1 October, 2024.
Silicon (Si) has been considered a beneficial element for many plants. Si-rich biochar (Sichars) from rice husk or peanut shell have been suggested to be a potential source of bioavailable Si for Si-accumulator plants. Our study aimed to assess the Si-fertilization efficiency from chemical fertilizer and rice husk and peanut shell biochars on rice dry matter and shoot Si uptake.
Pot trials were conducted in two crop seasons in 2023 (from February to April - spring season and from May to Julysummer season) in the close net house. Treatments included 1 treatment with pure soil (control), 4 treatments with Si and N-P-K fertilizers and 6 treatments with biochar amendments and N-P-K fertilizers. These pot experiments were designed in the randomized complete block (RCBD) with 4 replications.
Shoot dry matter increased from 35.6 to 66.7% compared with control in different rates of Si fertilizer application and was also found the highest values in RHB and PSB at 15 g/kg soil application. Different Si and biochar application rates had a significant effect (P<0.05) on Si uptake by rice shoot. Therefore, Si-rich biochar considers as potential material for providing available Si to maintain the required level of available Si in soil and plant for healthy and high crop production.
Biochar, Pot experiment, Rice, Shoot Si, Si rate
