7Alice Ahesor, Martin Oesterheld, Elsa Leoni, Felipe Lezama and Claudia Rodriguez. Effect of grazing on community structure and pro4ductivity of a Uruguayan grassland [ J ]. Plant Ecology ,20051179:83 - 91. 被引量:1
8N.T. Donkor, R. J. Hudson, E.W. Bork, D. S. Chanasyk, and M.A. Naeth. Quantification andSimulation of Grazing Impacts on Soil Water in Boreal Grasslands[J]. J. Agronomy & Crop Science ,2006,192 : 192 - 200. 被引量:1
10M.K. Abbasi,W. A. Adams. Estimatinn of simultaneous nitrification and denitrification in grassland soil association wilh urea - N using 15N and nitrification inhibite [J]. Biol Fertil Soils,2000,31:38 -44. 被引量:1