Evaluation of Growth Parameters of Sorghum bicolor (L. Moench) in Rusty Soil Treated with Sulfosalicylic Acid
Keywords:
Rusty Soil, Sulfosalicylic Acid, Iron Chelation, Plant GrowthAbstract
Rusty soil is a mixture of rusty sand (a waste from treatment of groundwater), soil, and manure and this mixture has been shown to support optimal plant growth when there is 75%, 12.5%, and 12.5% rusty sand, soil, and manure, respectively. In a bid to improve the growth performance of plants in the rusty soil, which contains high concentration of iron due to precipitation of the micronutrient as ferric ion during groundwater treatment, sulfosalicylic acid was applied as an iron chelator. The experimentation was done under natural conditions of environment by using 5000g each of loamy soil and rusty sand as negative and positive controls, respectively. The sulfosalicylic acid treatments for the experimentation included 10g, 30g, and 50g dissolution of the acid in distilled water and their application on 5000g of rusty sand and rusty soil (75% rusty sand, 12.5% loamy soil, and 12.5% manure). Three-week old sorghum plants were placed in the experimental soils in triplicate and the growth parameters including length of shoot, leaf, width, and root, and mass of the plant parts were monitored. Statistical analysis of the mean values of the parameters at probability value benchmarked at 5% showed that growth performance of the plants in the rusty soil was similar to the performance noticed in the loamy soil. In addition, planting in the rusty soil resulted in better fresh stem biomass and fresh total biomass than planting in the loamy soil and there were significant improvements of shoot length, increase in shoot length, leaf length, increase in leaf length, increase in leaf width and fresh root biomass due to addition of 10g sulfosalicylic acid in the rusty soil. Therefore, the quality of the rusty soil for plant growth was improved by treatment with the iron-chelating sulfosalicylic acid.
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