Affiliations: College of Resources and Environment Sciences, China
Agriculture University, Beijing 100094, China | College of Animal Sciences, Zhejiang University,
Hangzhou 310029, China
Abstract: Manure odor, which results in the increasing complaints and
lawsuits, has increased the tension among swine producers and surrounding
residents. The effects of Lactobacillus plantarum and different rates of
soluble carbohydrates additions to swine manure on odorous compounds, chemical
compounds and indigenous flora were evaluated. Additions were calculated on
dried manure weight basis. Variables monitored included ammonia
(NH_3), hydrogen sulfide (H_2S), odor
offensiveness, pH, ammonium nitrogen(NH_4^+-N), volatile
fatty acids (VFAs), urease and indigenous flora. The results indicated that the
combination of L. plantarum and soluble carbohydrates dramatically reduced
manure pH. Lower pH resulted in the reduction of NH_3
volatilization (34.6%–92.4%, P<0.01), the increases of
H_2S (P< 0.05) and NH_4^+-N
(5.3%–17.5%, P<0.05). In addition, L. plantarum and soluble
carbohydrates additions significantly reduced odor offensiveness, those VFAs
related to malodor indicators(valeric acids, 12.3%–47.7%, P<0.05;
iso-valeric, 3.5%–23.8%) and the main microorganisms responsible for odor
production, with the number of Eubacteria in swine manure reducing by 4.9%,
11.6%, 17.4%, 34.1% and 32.2% respectively.
