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Objectives: The study was conducted to determine (i) suitable waste, its quantity and dose of Trichoderma harzianum suspension and (ii) the impact of tricho-compost application on soil productivity.
Materials and Methods: Soil properties were tested before and after application of Trichoderma enhanced composting technology at five different districts of North-West Bangladesh. RCBD was used in the experiment where six biodegradable substratum were used and mixed with Trichoderma suspension in each pit. These six substratums were mixed with five doses of Trichoderma suspension i.e., 0, 250, 500, 750 and 1000 ml per 100 kg substratum with three replications and therefore 90 pits were prepared to conduct the experiment. Nutrient content like N, P, K, B, S, Zn, soil pH and organic carbon were analysed in the laboratory.
Results and Discussion: Among the composting materials potato plant, water hyacinth, cowdung and household waste produced better compost than rice stubble and bio-slurry. Trichoderma suspension dose on 100 kg substratum 750 and 1000 ml showed better efficacy than other doses in terms of decomposition time, quantity of produced composed and nutrient value. The status of nutrient in soil were compared before and after interventions of Trichoderma suspension by means of using paired t-test and found that soil pH, K, S, Zn, N and B were increased significantly, where as organic carbon slightly increased but not significant changed and P decreased significantly.
Conclusion: There should be ample scope to be created tricho-compost everywhere for soil improvement for better crop production towards food security and improved livelihoods.