EFFECT OF SODIC SALINITY STRESS ON SODIUM ACCUMULATION IN APPLE TREES

Sodic salinity stress was severly affected the production of apple in middle east region of Gansu Province.'Golden Delicious' growed in farmland in Qin'an County of Gansu Province was used as the experiment material.The effects on the sodium content of apple roots,bronches,leaves,flowers and fruit during the growth period were investigated.The results showed that the content of sodium was 1800mg/kg in root,800～1400mg/kg in branches,1700～2500mg/kg in leaves,700mg/kg in flowers,1200～1500mg/kg in fruits of trees growing under sodic salinity stress,which was 2 times,3.4～8.5 times,1.4 times and 2.1～12 times of trees growing under normal condition,respectively.And sodic salinity latency stress phase is thus brought forward in apple florescence.