Effect of priming with humic acid on seed germination and seedling growth of three milk thistle (Silybum marianum L.) ecotypes

In order to determine the effect of acid humic and definition¡ of the best mass response on characteristic of germination and growth Milk thistle¡ research using 4 acid humic levels(0.0¡1.0¡5.5¡2%) in three ecotypes of Milk thistle (North¡ Majary¡ Molasany)was done with a method of pre-treatment. This experiment occure in a complete random blocks with 3 replications. Results showed that humic acid treatment on germination rate¡ shoot and root length has a significant difference and increases this traits compared to control. Also¡ the average time required for germination was significant reduced the time of germination compared to control. Between the masses the average time of germination and shoot length was significant. North mass showed the best response to humic acid¡ and it resulted the best respance in 1.5 percent concentrate among humic acid causes to improve generation witheffication on physiological and biochemical activity. Refer to humic acid¡s positive and significant effect on germination and establishment of Milk thistle¡ this priming recommended to improve germination and growth of this plant.