Effect of Sugarcane Bagasse Biochar on Accumulation and Distribution of Nitrogen, Phosphorus, Root Characteristics and Wheat Grain Yield in Soils Contaminated with Lead and Nickel
2025
Tokhmehchian, Shahyad | marashi, seyed keyvan | babaeinejad, teimour
One of the main problems of contaminated soils is the presence of high amounts of heavy and toxic elements, especially lead and nickel, which leads to disruption in the growth and reduction of plant yield. The use of biochar has been proposed as one of the solutions to solve this problem. The purpose of this study was to investigate the effect of sugarcane biochar on accumulation and distribution of nitrogen and phosphorus absorption, root growth, and wheat grain yield in soils contaminated with lead and nickel. This experiment was carried out using factorial design in a completely randomized layout. The studied factors included the amounts of sugarcane biochar in four levels including: zero (control), 2%, 4%, and 6% of soil weight and the type of soil in two levels: contaminated and non-contaminated by lead and nickel. In this experiment, the maximum and minimum nitrogen and phosphorus absorbed in the root, stem, and grain of the plant were observed in contaminated and non-contaminated soil conditions, respectively. Also, with the increase in the use of biochar, there were changes in the accumulation of these elements in order to create suitable conditions for the plant, which subsequently had a significant effect on improving root growth and increasing grain yield. The maximum and minimum grain yield were observed in non-contaminated and contaminated soils, respectively and with increasing biochar consumption, grain yield increased in both contaminated and non- contaminated soils and this increase continued up to 4% biochar. In general, the results of the experiment showed that in the soil contaminated and non-contaminated with lead and nickel, the use of sugarcane bagasse biochar has an effective role in the accumulation of nitrogen and phosphorus in the plant, and to improve yield, the use of biochar up to 4% in the contaminated and non-contaminated soils is recommended.
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