7Maria Zevenhoven. The utilization of biomass ash[ R]. Turku: Faculty of Chemical Engineering of ABO Akademi University, 2001.
8Demeyer A, Voundi Nkana J C, Verloo M G. Characteristics of wood ash and influence on soil properties and nutrient uptake: an overview [ J ]. Bioresource Technology, 2001, 77 ( 3 ) :287 - 295.
9Pitman R M. Wood ash use in forestry-- a review of the environmental impacts[ J]. Forestry, 2006, 79 (5) :563 -588.
10Etiegnil L, Campbell A G. Physical and chemical characteristics of wood ash [ J]. Bioresource Technology, 1991, 37 (2) : 173 - 178.
