Nitrogen and Ammonia Mitigation on Laying Hen Farms: Effects of Low-protein Diet and Manure Filtering

Silaban, Rikardo and Sumiati, Sumiati and Adrizal, Adrizal and Yusrizal, Yusrizal and Sumadja, Wiwaha Anas and Yatno, Yatno and Noferdiman, Noferdiman and Koh, Katsuki and Rahman, Mustanur (2017) Nitrogen and Ammonia Mitigation on Laying Hen Farms: Effects of Low-protein Diet and Manure Filtering. International Journal of Poultry Science, 16. pp. 125-131. ISSN 1682-8356

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Abstract

Background: Lowering dietary Crude Protein (CP) has been widely reported as a method to reduce nitrogen (N) excretion, but information on its effect in combination with filtering by Azolla pinnata to further mitigate N or ammonia (NH3) volatilization from laying hen manure is limited. Materials and Methods: Two experimental diets containing 17% (control) and 15% (low) crude protein were assigned to 2 groups of 22 weeks old ISA Brown hens, so each treatment had 20 replicates with 6-7 birds each. The manure from each group was flushed into two terraced ponds, in which Azolla pinnata was grown in the lowest terrace to filter the N in the sludge. Fresh manure was collected when the hens were 29 weeks old to analyze the N and NH3 contents and perform microbial counts and analyses of pond water quality (total dissolved solubles, temperature and pH), Azolla N and egg quality were conducted. Data were subjected to either a one or two-way ANOVA. Results: Lowering dietary crude protein to 15% resulted in a 21.83% (p<0.05) decrease in manure NH3, but it did not alter the microbial counts or N content. Additionally, pond water quality was not affected by dietary CP, the presence of Azolla in the pond or the dietary crude protein× Azolla interaction and there was no difference in the N content of the Azolla biomass among dietary groups. Eggs laid by hens given the low-CP diet had comparable quality to those laid by the control hens. Conclusion: Reducing dietary crude protein to 15% lowered NH3 volatilization and did not negatively affect egg quality. However, growing Azolla in a terraced pond failed to elicit an N-filtering effect. Key words: Ammonia mitigation, nitrogen, low protein, manure filtering, laying hen

Type:	Article
Subjects:	S Agriculture > SF Animal culture
Divisions:	Fakultas Peternakan > Peternakan
Depositing User:	Noferdiman
Date Deposited:	19 Mar 2021 02:09
Last Modified:	19 Mar 2021 02:09
URI:	https://repository.unja.ac.id/id/eprint/18509

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