Potential of Amended Silt as Nutrient Input in Agriculture- A Chemical Composition Analysis

Accumulation of silt in channels and ponds has necessitated its removal, and its proper utilization has become pertinent for effective disposal. The present investigation aimed to explore the potential of using silt as a nutrient input and amending it with aquatic weeds paving the way to address the aquatic weed menace. The experiment was conducted at the Regional Agricultural Research Station, Kumarakom, Kottayam, during September to November 2022. The nutrient composition of silt was assessed and was amended in a 2:1 ratio (v/v) with various organic inputs, namely, FYM, Gliricidia leaves, Salvinia, Salvinia + Gliricidia leaves, Eichhornia + Gliricidia leaves, vermicomposted Eichhornia, and coir pith compost. Additionally, dolomite was added based on the initial pH of the silt to adjust it to pH 7. The results indicated an enhancement in the nutrient status of silt following amendment. The amended silt had higher nutrient contents and lower C:N ratio compared to the raw materials and unamended silt. Among the treatments, silt amended with Gliricidia leaves and Salvinia was found to be the most suitable option owing to its higher overall nutrient composition.