Abstract:
This study aimed to develop a rapid composting method using Trichoderma harzianum culture
of liquid state. Assessment of physico-chemical properties and nutritional qualities of composted
crop residues generated by Tricho-composting is another concern. Different types of crop
residues (Rice straw, Sugarcane bagasse, Black gram straw, and Mustard straw) were composted
with T. harzianum IMI 392432 in a randomized block design with three replications.
Composting was conducted in cement slabs, maintaining a pH range of 6.55 to 7.40.
Temperature peaked at 10°-15°C during thermophilic activity before declining. Moisture content
decreased gradually, with 15-20% retained in the finished compost. Weight loss ranged from
40.50% to 51.60%, and decomposition time varied from 67.33 to 96.00 days wherein mustard
straw decomposed fast. Sugarcane bagasse decomposed slowly and black gram residues
decomposed faster despite having less carbon. Mustard straw exhibited significant weight loss
though their carbon content was abundant initially. Despite carbon losses in time, sugarcane
bagasse and rice straw retained their properties longer than other residues. The highest
phosphorus and potash content found with the decomposed residues of sugarcane in the
treatment T2. The treatment of T4 comprise mustard straw showed the lowest phosphorus content
and their potash content was 0.19 % which is non-significant with lowest potash containing rice
straw generated compost. Easily produced Trichoderma harzianum liquid inoculums accelerated
the composting process in accordance with their C:N ratio demonstrating its potential for
efficient management of crop residues. |
