ﺗﺎﺛﯿﺮ ﺑﯿﻮﭼﺎر و اﺳﯿﺪ ﺳﺎﻟﯿﺴﯿﻠﯿﮏ ﺑﺮ ﺧﺼﻮﺻﯿﺎت ﻣﻮرﻓﻮﻟﻮژﯾﮑﯽ ﺳﻮرﮔﻮم ﺗﺤﺖ ﺗﻨﺶ ﺳﺮب

Effect of biochar and salicylic acid on morphological characteristics of sorghum under lead stress

ﭼﮑﯿﺪه ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ اﺛﺮ ﺑﯿﻮﭼﺎر و اﺳﯿﺪ ﺳﺎﻟﯿﺴﯿﻠﯿﮏ ﺑﺮ ﺧﺼﻮﺻﯿﺎت ﻣﻮرﻓﻮﻟﻮژﯾﮑﯽ ﺳﻮرﮔﻮم ).Sorghum bicolor L( ﺗﺤﺖ آﻟﻮدﮔﯽ ﺧﺎك ﺑﻪ ﻋﻨﺼﺮ ﺳﻨﮕﯿﻦ ﺳﺮب، آزﻣﺎﯾﺸﯽ ﺑﻪ ﺻﻮرت ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﻃﺮح ﮐﺎﻣﻼ ﺗﺼﺎدﻓﯽ ﺑﺎ 4 ﺗﮑﺮار در ﮔﻠﺨﺎﻧﻪ داﻧﺸﮕﺎه ﻋﻠﻮم ﮐﺸﺎورزي و ﻣﻨﺎﺑﻊ ﻃﺒﯿﻌﯽ ﺳﺎري در ﺳﺎل 1398 اﻧﺠﺎم ﺷ.ﺪ ﺗﯿﻤﺎرﻫﺎ در ﭘﻨﭻ ﺳﻄﺢ ﺳﺮب )،0 400، 800، 1200 و 1600 ﻣﯿﻠﯽ ﮔﺮم ﺳﺮب در ﮐﯿﻠﻮ ﮔﺮم ﺧﺎك(، دو ﺳﻄﺢ ﺑﯿﻮﭼﺎر )ﻋﺪم ﻣﺼﺮف و ﻣﺼﺮف 20 ﮔﺮم ﺑﯿﻮﭼﺎر ﺑﻪ ازاي ﻫﺮ ﮐﯿﻠﻮﮔﺮم ﺧﺎك( و دو ﺳﻄﺢ اﺳﯿﺪ ﺳﺎﻟﯿﺴﯿﻠﯿﮏ )ﻋﺪم ﻣﺤﻠﻮل ﭘﺎﺷﯽ و ﻣﺤﻠﻮل ﭘﺎﺷﯽ 2 ﻣﯿﻠﯽ ﻣﻮﻻر( ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺘﻨﺪ. ﺻﻔﺎت اﻧﺪازه ﮔﯿﺮي ﺷﺪه ﺷﺎﻣﻞ ارﺗﻔﺎع ﺑﻮﺗﻪ، ﻗﻄﺮ ﺳﺎﻗﻪ، ﻃﻮل ﺑﺮگ و ﺗﻌﺪاد ﺑﺮگ ﺑﻮد. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ ﺻﻔﺎت ﻣﻮرﻓﻮﻟﻮژﯾﮑﯽ ﺳﻮرﮔﻮم ﺑﺎ اﻓﺰاﯾﺶ ﻏﻠﻈﺖ ﺳﺮب ﺧﺎك ﮐﺎﻫﺶ ﯾﺎﻓﺘﻨ.ﺪ ﮐﺎرﺑﺮد ﺑﯿﻮﭼﺎر در ﮔﯿﺎﻫﺎن ﺗﺤﺖ ﺗﻨﺶ ﺳﺮب ﺳﺒﺐ ﺑﻬﺒﻮد ﺻﻔﺎت ﻗﻄﺮ ﺳﺎﻗﻪ، ﻃﻮل ﺑﺮگ و ﺗﻌﺪاد ﺑﺮگ ﺷﺪ و ﺑﺎ ﻣﺤﻠﻮل ﭘﺎﺷﯽ اﺳﯿﺪ ﺳﺎﻟﯿﺴﯿﻠﯿﮏ ارﺗﻔﺎع ﺑﻮﺗﻪ ﻧﺴﺒﺖ ﺑﻪ ﺷﺎﻫﺪ اﻓﺰاﯾﺶ ﻧﺸﺎن داد.

To investigate the effect of biochar and salcylic acid on morphological characteristics of sorghum (Sorghum bicolor) under the stress of heavy metal lead, a factorial experiment was conducted in a completely randomized design with four replications at greenhouse of Sari Agricultural Sciences and Natural Resources University in 2019. Treatments were five levels of lead (0, 400, 800, 1200 and 1600 mg of Pb per kg soil), two levels of biochar (control and application of 20 g biochar per kg soil) and salicylic acid was examined at two levels (control and 2 mM foliar application). The measured traits included plant height, stem diameter, leaf lenght and leaf number. Results showed that the morphological traits of sorghum decresed with incresing soil Pb concentration. Under lead stress, biochar application in plant improved stem diameter, leaf length and leaf number; also with foliar application of salicylic acid, plant height increased compare to control.