Physiological Responses of Soybean Varieties to Different Types of Biochar Application
DOI:
https://doi.org/10.18196/pt.v13i2.25382Keywords:
Alfisol, Dena 1, Palm fiber, Rice hull, Soil amendmentsAbstract
Soybean is a legume with high consumption in Indonesia but relatively low productivity. To address this challenge, researchers are exploring improved varieties and soil amendments such as biochar to enhance growth performance. This study aimed to evaluate the effects of soybean varieties and biochar types on physiological growth parameters. The experiment was conducted from August 2022 to June 2023 at the experimental field of Sebelas Maret University, located in Sukosari Village, Jumantono District, Karanganyar Regency. A two-factor randomized complete block design (RCBD) with three replications was employed, testing three soybean varieties (Dena 1, Demas 1, and Gepak Kuning) and three biochar treatments (control, palm fibre, and rice hull). Data were analyzed using analysis of variance (ANOVA), followed by Duncan’s Multiple Range Test (DMRT) at a 5% significance level. Results indicated that rice hull biochar improved net assimilation rate and relative growth rate by 1.95% and 1.59%, respectively, between the third and fifth weeks after planting. It also increased total dry weight by 1.37% and leaf area index by 1.72% compared to untreated plants. Among the varieties tested, Dena 1 yielded the highest total dry weight (1.41%) and leaf area index (1.53%), highlighting a promising synergy between this variety and rice hull biochar.
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