9Thomas Sims J. Agricultural and environmental issues in the management of poultry wastes: ressent innovations and long-term challengesa[A]. In: Jack Erechcigl, HerbetC. Nackinnon. Agricultural Uses of BY-product and wastes [M]. Washington, D. C: American
10Gannon .JT, Mingelgrin U, Alexander M, Wagenet RJ. Bacterial transport through homogeneous soil [J]. Soil Biology and Biochemistry, 1991,23(12): 1155-1160.