7Spence Gunn.Growing media comes to life[J].Horticulture Week Teddington:2005,17:29-30.
8Cattivello C.Behaviour of composted chestnut bark sbustrates in cyclamen cultivation[J].Italus hortus,1995,2(5-6):63-67.
9Woodard M A,Bearce B C.Coal bottom ash and pine wood peelings as root substrates in a circulating nutriculture system[J].HortiScience,1993,28(6):636-638.