A Comparative Study on Soil Nitrogen (N) Gross Rate of Mineralization, Nitrification and Consumption Over Three Management Systems of Leymus chinensis Grasslands
三种利用类型羊草草地氮总矿化、硝化和无机氮消耗速率的比较研究

This experiment was carried out in L. chinensis grasslands in northeast China. Grasslands that were 1) protected; 2) overgrazed and 3) mown were compared for gross rates of mineralization, nitrification and consumption during growth seasons. The 15 N isotope pool dilution technique in intact cores was used to study differences in nitrogen transformation within three management systems of L. chinensis grasslands. Sampling was carried out in the middle April, July and September respectively. In br...