“…Although gross amount of fertilizers used for forest production of tree stocks may not be comparable as for agricultural and horticultural crops, however, the risk arisen from containerized tree stock culture cannot be overlooked (Juntunen and Rikala, 2001;Juntunen et al, 2002Juntunen et al, , 2003Dobrahner et al, 2007;GomezRey et al, 2008). Thus, nursery bare-root stocks occupies a large proportion of tree seedling productions from the whole tree seedling culture system, wherein the proportion of containerized stocks, however is lower but growing dramatically at a considerable speed all over the world including Norway, Sweden, Finland, Canada (Juntunen et al, 2002), USA (South et al, 2005;Pinto et al, 2011), and China (Xu et al, 2013).…”