3Maeda M, Zhao B Z, Ozaki Y, et al. Nitrate leaching in an andisol treated with different types of fertilizers[J]. Environmental Pollution, 2003, 121(3) : 477-487.
4Boer W D, Kowalchuk G A. Nitrification in acid soils: micro-organisms and mechanisms[[J]. Soil Biology Biochemistry, 2001, 33(7/8): 853-866.
5Jansson S L, Persson J. Mineralization and immobilization of soil nitrogen[C]// Stevenson F J. Nitrogen in Agricultural Soil. USA: Madison, Wisconsin, 1982:229-248.
6Aarnio T, Martikainer P J. Nitrification in forest soil after referitilization with urea or urea and Dicyandiamide[J]. Soil Biology Biochemistry, 1992, 24(10): 951-954.
7КОЕНЬКОВДА(尹崇仁,等译).氮肥的农业化学[M].北京:农业出版社,1983:116.
8Fisk M C, Schmidt S K. Microbial response to nitrogen addition in Alpine tundra soil[J]. Soil Biology Biochemistry, 1996o 28(6): 751-755.