College of Horticulture Science and Engineering，Shandong Agricultural University，State Key Laboratory of Crop Biology，Key Laboratory of Horticultural Crop Biology，Ministry of Agriculture，Tai’an 271018，Shandong，China
Abstract：Effects of different boron levels on photosynthetic characteristics，fresh weight，dry weight and qualities of‘Cangshansuan’（Allium sativum L.）were studied by nutrient solution．The results showed that the photosynthetic pigment contents，photosynthetic parameter（Pn，E，Gs）in leaf laminas firstly increased and then decreased with the increase of boron concentration．It reached maximum while boron content was 1.0 mg?L-1．Meanwhile，the content of soluble sugar，soluble protein，VC，free amino acids and allicin in garlic bolt and bulb were 71.33% and 59.20%，47.91% and 131.79%，50.02% and 68.71%，62.80% and 38.83%，57.69% and 50.94% higher than the treatment of 0 mg?L-1 boron concentration．And on this concentration，the dry and fresh weights of bulb and bolt were 194.90% and 156.20%，130.89% and 121.84% higher than that of the treatment of 0 mg?L-1 boron concentration.
