ﺗﺄﺛﯿﺮ ﮐﺎﺑﺮد ﺳﻮﻟﻔﺎت ﭘﺘﺎﺳﯿﻢ و ﺳﻮﻟﻔﺎت آﻣﻮﻧﯿﻮم ﺑﺮ ﮐﯿﻔﯿﺖ روﻏﻦ ﮐﺎﻣﻠﯿﻨﺎ ﺗﺤﺖ ﺷﺮاﯾﻂ ﺗﻨﺶ ﺧﺸﮑﯽ

The effect of application of potassium sulfate and ammonium sulfate on quality of camelina oil under drought stress conditions

به منظور ﺑﺮرﺳﯽ ﺗﺄﺛﯿﺮ ﭘﺘﺎﺳﯿﻢ ﺳﻮﻟﻔﺎت و آﻣﻮﻧﯿﻮم ﺳﻮﻟﻔﺎت ﺑﺮ ﮐﯿﻔﯿﺖ روﻏﻦ ﮐﺎﻣﻠﯿﻨﺎ ﺗﺤﺖ ﺷﺮاﯾﻂ ﺗﻨﺶ ﺧﺸﮑﯽ ﯾﮏ آزﻣﺎﯾﺶ ﻣﺰرﻋﻪ اي در ﮐﺮج اﻧﺠﺎم ﺷﺪ. آزﻣﺎﯾﺶ ﺑﺼﻮرت ﮐﺮت ﺧﺮد ﺷﺪه-ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﺑﻠﻮك ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ ﺳﻪ ﺗﮑﺮار اﻧﺠﺎم ﺷﺪ ﮐﻪ ﺗﯿﻤﺎرﻫﺎي آﺑﯿﺎري )ﻣﻌﻤﻮﻟﯽ، ﻗﻄﻊ آﺑﯿﺎري از ﻣﺮﺣﻠﻪ ﮐﭙﺴﻮل دﻫﯽ و ﮔﻠﺪﻫﯽ( در ﮐﺮت ﻫﺎي اﺻﻠﯽ و ﺗﺮﮐﯿﺐ ﺳﻮﻟﻔﺎت ﭘﺘﺎﺳﯿﻢ و ﺳﻮﻟﻔﺎت آﻣﻮﻧﯿﻮم )0، 25، 50 و 75 ﮐﯿﻠﻮﮔﺮم در ﻫﮑﺘﺎر( ﺑﻪ ﺻﻮرت ﻓﺎﮐﺘﻮرﯾﻞ در ﮐﺮت ﻫﺎي ﻓﺮﻋﯽ ﺑﻮدﻧﺪ. اﺳﯿﺪ اروﺳﯿﮏ و ﮔﻠﻮﮐﻮزﯾﻨﻮﻻت ﺑﻪ ﻃﻮر ﻣﻌﻨﯽ داري ﺗﺤﺖ ﺗﺄﺛﯿﺮ آﺑﯿﺎري، ﺳﻮﻟﻔﺎت ﭘﺘﺎﺳﯿﻢ و ﺳﻮﻟﻔﺎت آﻣﻮﻧﯿﻮم ﻗﺮار ﮔﺮﻓﺘﻨﺪ. ﻧﺘﺎﯾﺞ اﯾﻦ ﺗﺤﻘﯿﻖ ﻧﺸﺎن داد ﮐﻪ ﺗﻨﺶ ﺧﺸﮑﯽ ﺑﺎﻋﺚ اﻓﺰاﯾﺶ ﻣﺤﺘﻮاي اﺳﯿﺪ اروﺳﯿﮏ و ﮔﻠﻮﮐﻮزﯾﻨﻮﻻت روﻏﻦ ﺷﺪ. ﻫﻤﭽﻨﯿﻦ ﮐﺎرﺑﺮد ﺳﻮﻟﻔﺎت ﭘﺘﺎﺳﯿﻢ و ﺳﻮﻟﻔﺎت آﻣﻮﻧﯿﻮم ﻣﺤﺘﻮاي اﺳﯿﺪ اروﺳﯿﮏ و ﮔﻠﻮﮐﻮزﯾﻨﻮﻻت را ﮐﺎﻫﺶ دادﻧﺪ. ﺑﻪ ﻋﻨﻮان ﻧﺘﯿﺠﻪ ﮐﻠﯽ، ﮐﺎرﺑﺮد 75 ﮐﯿﻠﻮﮔﺮم ﺳﻮﻟﻔﺎت ﭘﺘﺎﺳﯿﻢ و ﺳﻮﻟﻔﺎت آﻣﻮﻧﯿﻢ در ﺗﯿﻤﺎر آﺑﯿﺎري ﻣﻌﻤﻮﻟﯽ ﺑﯿﺸﺘﺮﯾﻦ ﻣﻘﺪار ﻋﻤﻠﮑﺮد روﻏﻦ و ﮐﻤﺘﺮﯾﻦ ﻣﻘﺪار اﺳﯿﺪ اروﺳﯿﮏ و ﮔﻠﻮﮐﻮزﯾﻨﻮﻻت را داﺷﺖ.

A field experiment was conducted to investigate the effect of potassium sulfate and ammonium sulfate on quality of camelina oil under drought conditions. The experiment was conducted as a split plot-factorial in a randomized complete block design with three replications, with irrigation regimes (normal irrigation, irrigation interruptions from pod formation and flowering stages) in the main plots and combine of potassium sulfate (0, 25, 50, and 75 kg ha-1) and ammonium sulfate (0, 25, 50, and 75 kg ha-1) fertilizers in the sub plots. The erucic acid and glucosinolate contents were significantly affected by irrigation regimes, potassium sulfate and ammonium sulfate. The results showed that the erucic acid and glocosinolate contents increased under drought stress conditions. Also, the erucic acid and glocosinolate contents decreased under application of Potassium sulfate and Ammonium sulfate. As a general result, the application of 75 kg ha-1 potassium sulfate and ammonium sulfate had the highest oil yield and the lowest amount of erucic acid and glomosinolate contents in normal irrigation treatment