Abstract: Onion bulbs were treated with six kinds of chemicals( hydrochloric acid, sodium hydroxide, malefic hydrazide, sorbic acid, salicylic acid，ethylene)in three concentration at the time of 14 d in front harves and after harvest by spraying and dipping. The results showed that there were significant inhibiting effect on the onion bulbs germination rate by spraying with five kinds of chemicals. The germination rate by spraying with HCl 1400 mg /kg，NaOH 450 mg/kg，MH 1600 mg/kg, SA 1000 mg/kg and ETH 200 mg/kg was 35.29%， 17.65%,24.84%，13.50%,35.29%lower than that of control respectively. The difference was significant or most significant. The inhibiting order was ETH 200 mg/kg>HCl 1400 mg/kg>MH 1600 mg/kg>NaOH 450 mg/kg>SA 1000 mg/kg. There were significant inhibiting effect on the onion bulbs germination rate by dipping with six kinds of chemicals. The germination rate by dipping with HCl 2100 mg/kg，NaOH 300 mg/ kg,MH 2000 mg/kg,SBA 2000 mg/kg,SA 800 mg/kg and ETH 200 mg/kg was 28.13%,28.13%,28.13%， 40.62%,28.13%,34.37%lower than that of control.The difference was significant or most significant.The inhibiting order was SBA 2000 mg/kg>ETH 200 mg/kg>HCl 2100 mg/kg>MH 2000 mg/kg > NaOH 300 mg/kg>SA 800 mg/kg.

Key words: Chemicals, Onion bulbs, Inhibiting, Germination

CLC Number: 

• S633.209.3