9Achiano K A,Giliomee J H. Diptera breeding in poultry ma- nure and the abiodc factors affecting their numbers [J]. African Entomology, 2005,13 (2) : 239- 248.
10Jongebreur A A, Monteny G J. Prevention and control of losses of gaseous nitrogen compounds in livestock operations: A review[J]. The Scientific World Journal,2001,1(18) :844-851.
