Ethiopian Journal of Environmental Studies and Management

Log in or Register to get access to full text downloads.

Remember me or Register

Effects of treated poultry litter on potential greenhouse gas emission and field agronomic performance

SA Bolu, SA Aderibigbe, LA Oyelayo


A study was conducted to evaluate the effects of different treatments of poultry faecal waste on potential greenhouse gas emission and inherent agronomic potentials. Sugar solution at 100g/l salt solution at 350g/l and oven-drying were the various faecal treatments examined using a completely randomized design. The experiment was conducted for eight weeks. Salt treatment had significantly lower nitrogen content (1.70%; p<0.05), and highest nitrogen depletion percentage (1.34%; p<0.05) while sugar treatment showed superiority in nitrogen trapping tendency, with depletion rate of -0.6%. Moisture content tends to increase significantly in sugar treatment (86.67%; p<0.05) and lowest with samples oven-dried (57.33%; p<0.05). Sugar treatment had a mildly acidic pH of 5.66, which was significantly lower (p<0.05) than was observed in Salt treatment (6.35). Salt treatment increased in weight over the 8weeks in storage (2.52kg, p<0.05), Sugar treatment weighed 2.28kg, heavier than oven-dried and control treatments (p<0.05), largely due to the process of fermentation. Baseline microbial assay studies shows no difference (p>0.05) in microbial count across all treatments, as was observed up till the 8th week. By the 4th week oven-dried faeces was lower (p<0.05) in fungal count (0.33×103cfu/ml) compared to other treatments, and completely devoid of Fungi by the end of the 8th week. On agronomic performance test, maize planted using sugar treatments had a 40% germination percentage (GP) after two weeks, oven-dry treatment and the control had mean GP of 65% and 75% respectively. The Sorghum plot attained 100% GP with the control and oven-dry treatments, sugar treatment recorded 88% GP. In both cases, germination was nil on salt treatment. By the third week ending, maize stands on control treatment were averagely 48cm tall, 19cm on oven-dried treatment and10cm on sugar treated pots. This trend persisted on sorghum plots with oven-dry treatment showing superiority to other treatments, averaging a plant height of 28cm after 21days.


Key Words: Sugar, Salt, Oven-drying, Germination, Faecal waste, Fungal count
AJOL African Journals Online