Department of Environmental & Energy Engineering, Yonsei University, Wonju 26493, Republic of Korea.
Department of Environmental & Energy Engineering, Yonsei University, Wonju 26493, Republic of Korea; Faculty of Civil and Water Resource Engineering, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia.
Sci Total Environ. 2022 Aug 25;836:155746. doi: 10.1016/j.scitotenv.2022.155746. Epub 2022 May 5.
The soil physical properties are deteriorating due to changing rainfall patterns and intensities, as well as climate change-induced temperature fluctuations. Pot experiments were carried out to examine the impacts of synthesized soil amendments on soil water retention and plant growth. Soil amendments (biochar, polyacrylamide (PAM), and moringa) were used at different rates (0 (control), 2.1, 4.2, and 8.3 g kg) to improve the physical properties of the soil. As a result of soil amendment application, it was found that the mean weight diameter of soil aggregate increased by 188% during the 8.3 g kg treatment, forming stable soil particles. Soil water retention improved by up to 128.9% during the 8.3 g kg treatment, and it was analyzed that it was due to the high surface area of biochar, porosity, and high molecular weight of PAM. Pellet treatment increased all plant growth parameters (height, stem diameter, leaf number, and fresh and dry weight) for both beans and maize. The dry weight of beans (C plant) and maize (C plant) increased by 92.9 and 146.4%, respectively in an 8.3 g kg pot. The soil physical condition was stabilized by the high carbon content of biochar and the improvement of soil coagulation between PAM and moringa. This had a positive effect on the C plant. The findings of this study indicate that if the soil amendments are properly mixed and applied based, they will improve soil stability and plant productivity.
由于降雨模式和强度的变化以及气候变化引起的温度波动，土壤物理性质正在恶化。进行了盆栽实验，以研究合成土壤改良剂对土壤保持和植物生长的影响。土壤改良剂（生物炭、聚丙烯酰胺（PAM）和辣木）以不同的速率（0（对照）、2.1、4.2 和 8.3 g kg）用于改善土壤物理性质。由于施用土壤改良剂，发现 8.3 g kg 处理下土壤团聚体的平均重量直径增加了 188%，形成了稳定的土壤颗粒。土壤保水率在 8.3 g kg 处理下提高了高达 128.9%，分析认为这是由于生物炭的高表面积、孔隙率和 PAM 的高分子量所致。颗粒处理提高了豆类和玉米的所有植物生长参数（高度、茎直径、叶片数以及鲜重和干重）。8.3 g kg 盆栽中，豆类（C 植物）和玉米（C 植物）的干重分别增加了 92.9%和 146.4%。生物炭的高碳含量和 PAM 与辣木之间的土壤凝聚改善稳定了土壤物理状况。这对 C 植物有积极影响。本研究的结果表明，如果适当混合和施用土壤改良剂，将改善土壤稳定性和植物生产力。
