Muscutt A D, Harris G L, Bailey S W, et al. Buffer zones to improve water quality :a review of their potential use in U K agriculture[J]. Agriculture, Ecosystems and Environmental, 1993, 45( 1 ) :59-77.
[3]
Jansson M, Anderson R, Berggren H, et al. Wetlands and lakes as nitrogen traps[J]. Ambio, 1994, 23 (6) : 320-325.
Hamlin R L, Mills H A, Randle W M. Growth and nutrition of pansy as influenced by N-form ratio and temperature[J]. Journal of Plant Nutrition, 1999, 22(10) : 1637-1650.
Korner S, Das S K, Veensta S, et al. The effect of pH variation at the ammonium/ammonia equilibrium in wastewater and its toxicity to Lemnagibba[J]. Aquatic Botany, 2001, 71( 1 ) :71- 78.
Li Wen, Friedrich Recknagel. In situ removal of dissolved phosphorus in irrigation drainage water by planted floats preliminary results from growth chamber experiment[J]. Agriculture, Ecosystems and Environ- meat, 2002(90) :9-15.
