The content of inorganic nitrogen and the NH4+ /NO3- ratio greatly affected multiplication and subculture of sweet cherry in vitro. Low NH4+ /NO3- ratio was beneficial to producing tube plants with normal shape leaves.

• 培养基中无机氮含量和NH4+/NO3-比例对于甜樱桃试管苗增殖继代具有重要影响,降低NH4+/NO3-比例有利于产生叶片形态正常的试管苗植株。