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Subject: Microbiology × Author: Nandni × End date: 2018 × Start date: 2016 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Co-composting of paddy straw and poultry manure using microbial consortia and its effect on wheat growth
    (CCSHAU, 2017) Nandni; Goyal, Sneh
    Rice straw is a vegetative part of rice plant which is a waste material after harvesting. A major portion of this agricultural waste is subjected to open field burning leading to many environmental problems. In Haryana, about 6 million tons of rice straw is produced annually and 63% of this is burnt which causes environmental and health problems (Reinhard et al., 2001). Similarly, high rate application of poultry manure decreases the yield of crops which may be attributed to the toxic concentrations of nitrite, nitrate, ammonia and soluble salts. So, the present investigation was planned to co-compost paddy straw and poultry manure using microbial consortia. Co-composting of paddy straw and poultry manure in different ratios was carried out in cemented pits. Total organic carbon (%) was in the range of 32.03 to 47.29% at 0 day and declined to 30.70% in the treatment 4 after 90 days of co-composting. Amount of total N (%) content increased up to 1.91 % after 90 days of co-composting. Ammoniacal nitrogen contents decreased from 8.20 to 5.12 and 49.02 to 10.09 (mg/Kg) in controls, and from 14.01 to 5.08 (mg/ Kg) in the treatment 4 prepared from 5:1 ratio of paddy straw and poultry manure along with microbial consortia and cattle dung. Nitrate nitrogen was maximum (510 mg/Kg) in the treatment 4. Total phosphorus increased in all the treatments during co-composting and same trend was observed with total potassium contents. Initially temperature of all the treatments was around 33°C and elevated to maximum 56°C after 45 day of composting and then dropped down to 31 to 34°C in different treatments after 90 days of composting. The minimum amount of carbon dioxide evolution and water soluble carbon was in the treatment 4 (244 mg/100g and 0.98%, respectively). The maximum amount of humic substances was observed in the treatment 4 (114.51mg/g Humic and Fulvic acid) and minimum was in control (12.54 mg/g Humic and Fulvic acid) having poultry manure alone. The percentage germination varied from 52.5 to 97.5 in all the finished compost and maximum was in the treatment 4 showing that prepared compost does not have any phytotoxic effect. Root, shoot length, dry weight and N,P,K uptake of wheat crop was maximum in the treatment having 100% R.D.F. with quality compost (@ 5t/ha) prepared from paddy straw and poultry manure in ratio 5:1 along with microbial consortia and cattle dung (10%). The results of present study shows that co-composting of paddy straw and poultry manure in 5:1 ratio along with microbial consortia and cattle dung 10% resulted into a brown colored quality compost with neutral pH, C:N ratio 16.04 and its application (@ 5t/ha) with 100% RDF on wheat crop significantly improved the plant growth.