اﺛﺮ دﻣﺎ ﺑﺮ ﺧﺼﻮﺻﯿﺎت ﺟﻮاﻧﻪزﻧﯽ ﺑﺬر ﻋﻠﻒﻫﺮز ﺑﺎدآورد Notobasis syriaca

The effect of temperature on seed germination traits of Notobasis (Notobasis syriaca)

ﺑــﻪ ﻣﻨﻈــﻮر ﭘﺎﺳــﺦ ﻋﻠــﻒﻫــﺮز ﺑــﺎدآورد )Notobasis syriaca( ﺑــﻪ دﻣﺎﻫــﺎي ﻣﺨﺘﻠــﻒ، آزﻣﺎﯾﺸــﯽ ﺑــﺎ 8 دﻣــﺎ )30 ،25 ،20 ،15 ،10 ،5، 35 و 40 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد(، در ﻗﺎﻟــﺐ ﻃــﺮح ﮐــﺎﻣﻼً ﺗﺼــﺎدﻓﯽ در6 ﺗﮑــﺮار در داﻧﺸــﮕﺎه ﻋﻠــﻮم ﮐﺸــﺎورزي و ﻣﻨــﺎﺑﻊ ﻃﺒﯿﻌــﯽ ﺧﻮزﺳــﺘﺎن در ﺳــﺎل 1398 اﻧﺠــﺎم ﺷــﺪ. درﺻــﺪ ﺟﻮاﻧــﻪزﻧــﯽ اﯾــﻦ ﻋﻠــﻒﻫــﺮز در دﻣﺎﻫــﺎي 5 ﺗــﺎ 25 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد )95 درﺻــﺪ(،30 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد) 90 درﺻــﺪ(، 35 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد )24 درﺻــﺪ( و در دﻣــﺎي 40 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد ﺟﻮاﻧــﻪزﻧــﯽ ﮐــﺎﻣﻼ ﻣﺘﻮﻗــﻒ ﮔﺮدﯾــﺪ. ﺑﯿﺸــﺘﺮﯾﻦ ﺳــﺮﻋﺖ ﺟﻮاﻧــﻪزﻧــﯽ )36/58 ﺑــﺬر در روز( و ﺷــﺎﺧﺺ ﺟﻮاﻧــﻪزﻧــﯽ)407( در دﻣــﺎي 20 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد ﻣﺸــﺎﻫﺪه ﮔﺮدﯾــﺪ. ﺳــﺮﻋﺖ ﺟﻮاﻧــﻪزﻧــﯽ در دﻣــﺎي 30 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد )24/06 ﺑــﺬر در روز(، 5 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد )8/59 ﺑــﺬر در روز( و 10 درﺟــﻪ ﺳــﺎﻧﺘﯿﮕﺮاد )13/57 ﺑــﺬر در روز( ﺑــﻮد. ﺑﯿﺸــﺘﺮﯾﻦ و ﮐﻤﺘــﺮﯾﻦ ﻣﺘﻮﺳــﻂ زﻣــﺎن ﺟﻮاﻧــﻪزﻧــﯽ ﺑــﻪ ﺗﺮﺗﯿــﺐ در دﻣــﺎي 5 )2/239 روز( و 20 درﺟﻪ ﺳﺎﻧﺘﯿﮕﺮاد )0/80 روز( ﺑﻪ دﺳﺖ آﻣﺪ.

In order to response of Notobasis weed (Notobasis syriaca) to different temperatures, an experiment was done with 8 temperatures (5, 10, 15, 20, 25, 30, 35 and 40°C) base on completely randomized design (CRD) with 6 replication at agricultural sciences and natural resources university of Khuzestan in 2019. Germination percentage this weed was more than 95% in range 5-25°C, at 30°C (90%) at 35°C (24%) and was totally inhibited at 40°C. The maximum of germination rate (36.58 seed/day) and germination index (407) were observed at 20°C. Germination rate were at 30°C (24.06 seed/day), 5°C (8.59 seed/day) and 10°C (13.57 seed/day). The highest and lowest mean germination time (MGT) were obtained at 5°C (2.39 day) and 20°C (0.80 day) respectively.