ﺗﺎﺛﯿﺮ ﺗﻨﺶ ﺷﻮري ﺑﺮ ﺑﺮﺧﯽ ﺻﻔﺎت ﻣﻮرﻓﻮﻟﻮژﯾﮏ ﺟﻮ ﻣﻨﻄﻘﻪ ﺳﯿﺴﺘﺎن

The effect of salinity stress on some morphological traits of Sistan

ﺗﻨﺶ ﺷﻮري ﯾﮑﯽ از ﻣﻬﻢ ﺗﺮﯾﻦ ﺗﻨﺶ ﻫﺎي ﻏﯿﺮزﯾﺴﺘﯽ ﮐﻪ ﺑﺎﻋﺚ ﮐﺎﻫﺶ ﺗﻮﻟﯿﺪات ﻣﺤﺼﻮﻻت ﮐﺸﺎورزي در ﺧﺎك ﻫﺎي ﻣﻨﺎﻃﻖ ﺧﺸﮏ و ﻧﯿﻤﻪ ﺧﺸﮏ ﻣﯽ ﺷﻮد. ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ واﮐﻨﺶ ﺟﻮ رﻗﻢ ﻧﻮﻣﺎر ﺑﻪ ﺗﻨﺶ ﺷﻮري، آزﻣﺎﯾﺸﯽ در ﻗﺎﻟﺐ ﻃﺮح ﮐﺎﻣﻼ ﺗﺼﺎدﻓﯽ ﺑﺎ ﺳﻪ ﺗﮑﺮار در آزﻣﺎﯾﺸﮕﺎه ﺗﺤﻘﯿﻘﺎت داﻧﺸﮕﺎه زاﺑﻞ اﺟﺮا ﺷﺪ. ﺗﻨﺶ ﺷﻮري در ﺳﻪ ﺳﻄﺢ ﺻﻔﺮ،150، 300 دﺳﯽ زﯾﻤﻨﺲ در ﻣﺮاﺣﻞ اوﻟﯿﻪ رﺷﺪ اﻋﻤﺎل ﺷﺪ. ﭘﺲ از اﻋﻤﺎل ﺗﻨﺶ ﺷﻮري ﺑﺮﺧﯽ ﺻﻔﺎت ﻣﻮرﻓﻮﻟﻮژﯾﮏ از ﻗﺒﯿﻞ وزن ﺗﺮ و ﺧﺸﮏ رﯾﺸﻪ، ﻃﻮل رﯾﺸﻪ، ﻃﻮل ﺳﺎﻗﻪ، وزن ﺗﺮ و ﺧﺸﮏ اﻧﺪام ﻫﻮاﯾﯽ اﻧﺪازه ﮔﯿﺮي ﺷﺪ. ﻧﺘﺎﯾﺞ ﺣﺎﺻﻞ از ﺗﺠﺰﯾﻪ وارﯾﺎﻧﺲ ﻧﺸﺎن داد ﮐﻪ ﺑﯿﻦ ﺳﻄﻮح ﺗﻨﺶ ﺷﻮري از ﻧﻈﺮ ﺗﻤﺎﻣﯽ ﺻﻔﺎت ﻣﻮرد ﺑﺮرﺳﯽ اﺧﺘﻼف ﻣﻌﻨﯽ داري وﺟﻮد دارد. ﺑﺮاﺳﺎس ﻧﺘﺎﯾﺞ ﻣﻘﺎﯾﺴﻪ ﻣﯿﺎﻧﮕﯿﻦ ﺑﺎ اﻓﺰاﯾﺶ ﺗﻨﺶ ﺷﻮري ﮐﺎﻫﺶ در ﺑﺮﺧﯽ ﺻﻔﺎت از ﻗﺒﯿﻞ وزن ﺗﺮ و ﺧﺸﮏ رﯾﺸﻪ، ﻃﻮل رﯾﺸﻪ، ﻃﻮل ﺳﺎﻗﻪ و وزن ﺗﺮ و ﺧﺸﮏ اﻧﺪام ﻫﻮاﯾﯽ ﻧﺴﺒﺖ ﺑﻪ ﺷﺎﻫﺪ ﺑﯿﺸﺘﺮ ﺷﺪ و ﺑﯿﺸﺘﺮﯾﻦ ﮐﺎﻫﺶ ﺻﻔﺎت ﻣﻮرد ﻣﻄﺎﻟﻌﻪ در ﺳﻄﺢ ﺗﻨﺶ ﺷﻮري 300 دﺳﯽ زﯾﻤﻨﺲ ﻧﺴﺒﺖ ﺑﻪ ﺷﺎﻫﺪ ﻣﺸﺎﻫﺪه ﺷﺪ.

Salinity is one of the most important non-biotic stresses that reduce crop production in arid and semiarid soils. In order to investigate the response of Nomar cultivar to salinity stress, a completely randomized design with three replications was conducted in Zabol University Research Laboratory. Salinity stress was applied at three levels of zero, 150 and 300 dS in the early stages of growth. After applying salinity stress some morphological traits such as fresh and dry root weight, root length, stem length, fresh and dry weight of shoot were measured. The results of analysis of variance showed that there was a significant difference between the levels of salinity stress for all studied traits. Based on the results of mean comparison with increasing salinity stress, reduction in some traits such as fresh and dry root weight, root length, shoot length and fresh and dry weight of shoots was higher than control and the highest decrease in studied traits was observed to 300 dS the control.