Response of selected chemical properties of extremely acidic soils on the application of limes, rice husk biochar and zeolite

Abstract

Extremely acidic soils have low pH, high concentration of exchangeable Al<sup>3+</sup> and low cation exchange capacity (CEC) that cause severe growth for most plants. The study was conducted in the soil laboratory of the Indonesian Vegetable Research Institute, Lembang, from June to August 2019. A randomised complete block design with seventeen treatments, three replications, and three incubation times (3, 30 and 60 days) was deployed to assess the effect of rates of soil amendments, namely 5 to 30 t liming materials ha<sup>-1</sup>, 5 to 20 t rice husk biochar ha<sup>-1</sup>, and 5 to 20 t zeolite ha<sup>-1 </sup>on extremely acidic soils. The results showed that lime materials, i.e., lime, agriculture limestone, and hydrated lime had a similar effect on increasing soil pH and reducing exchangeable Al<sup>3+</sup>. Calcium super seemed more effective in increasing soil pH and reducing exchangeable Al<sup>3+</sup> than local lime due to the high CCE value. However, there was no significant response to the highest rice husk biochar and zeolite rate on soil pH and exchangeable Al<sup>3+</sup>. Rice husk biochar increased the concentration of K<sup>+</sup> and zeolite raised the concentration of Na<sup>+</sup>. However, the effect was minimal. About 3 t lime ha<sup>-1</sup> or 2.5 t calcium super ha<sup>-1</sup> or equivalent to 1.5 to 2 times exchangeable Al<sup>3+</sup> is required to obtain the soil pH target of 4.8, where the exchangeable Al<sup>3+</sup> was less than 0.5 cmol<sub>(+)</sub> kg<sup>-1</sup>.

Nutrient management of shallot (Allium cepa Aggregatum group) in Riau peatlands, a pot experiment

“…One of the most restricting factors in the peatlands is soil acidity. Soil acidity restricts root growth by increasing exchangeable Al 3+ and reducing P availability (Sopha et al, 2022). Soil amendments have been recommended to increase soil pH and alleviate aluminum toxicity.…”

Effects of soil amendment from herbal and eucalyptus industrial waste on methane emission and rice yield

“…Rice agriculture is the primary source of anthropogenic methane emissions, accounting for approximately 7 to 17% of global methane emissions (25 to 100 terragrams [Tg] of CH4 gas per year) (Conrad, 2009;Liu & Whitman, 2008). Rice has become an important crop worldwide, and several approaches to increasing rice production have been employed, such as the development of high-yielding varieties, a system of rice intensification, and the use of mineral fertilization (Haque et al, 2019;Mboyerwa et al, 2022;Sopha et al, 2022). Increased production leads to higher application of nitrogen fertilizers to rice fields, resulting in greater methane emissions (Wang et al, 2017).…”