The ratios of IAA to ABA and total sugar to total nitrogen are the main factors controlling the rooting of Pinus bungeana cuttings.The larger the ratio,the higher the rooting rate of cuttings.

• 白皮松插穗能否生根主要受IAA/ABA和总糖/总氮比值的调控；比值越大；其插穗生根率越高.