ﻣﻘﺎﯾﺴﻪ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ و اﺟﺰاي آن در ﻫﯿﺒﺮﯾﺪﻫﺎي ﺧﺎرﺟﯽ ﺟﺪﯾﺪ ﺳﻮرﮔﻮم ﻋﻠﻮﻓﻪاي در ﺗﺎرﯾﺦﻫﺎي ﻣﺨﺘﻠﻒ ﺑﺮداﺷﺖ

Comparison offorage yield and yield components in hybrids of foreign forage sorghum in different date of cuttings

ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ و اﺟﺰاي آن در ارﻗﺎم ﺧﺎرﺟﯽ ﺳﻮرﮔﻮم ﻋﻠﻮﻓﻪ اي، آزﻣﺎﯾﺸﯽ در ﺗﺎﺑﺴﺘﺎن ﺳﺎل 1397 در ﻣﺮﮐﺰ ﺗﺤﻘﯿﻘﺎت و آﻣﻮزش ﮐﺸﺎورزي و ﻣﻨﺎﺑﻊ ﻃﺒﯿﻌﯽ ﺧﻮزﺳﺘﺎن ﺑﻪ ﻣﺪت ﯾﮏ ﺳﺎل اﺟﺮا ﮔﺮدﯾﺪ. روش آﻣﺎري ﺑﻪ ﺻﻮرت آزﻣﺎﯾﺶ ﮐﺮت ﻫﺎي ﺧﺮد ﺷﺪه در زﻣﺎن در ﻗﺎﻟﺐ ﺑﻠﻮك ﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ 3 ﺗﮑﺮار ﺑﻮد. ﮐﺮت اﺻﻠﯽ در 4 ﺳﻄﺢ ﺷﺎﻣﻞ ارﻗﺎم EUG542F, ES HARMATTAN, ES ATHENAو Speed Feed ﺑ.ﻮد ﮐﺮت ﻓﺮﻋﯽ ﻧﯿﺰ در دو ﺳﻄﺢ ﺷﺎﻣﻞ ﭼﯿﻦ ﺑﺮداري در ﺗﺎرﯾﺦ 5 ﺷﻬﺮﯾﻮر و 5 آﺑﺎن ﺑﻮد. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد اﺛﺮ ﻫﯿﺒﺮﯾﺪ و ﺑﺮﻫﻤﮑﻨﺶ ﺗﯿﻤﺎرﻫﺎ ﺑﺮ ﮐﻠﯿﻪ ﺻﻔﺎت ﺑﻪ ﻏﯿﺮ از ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ ﺧﺸﮏ ﻣﻌﻨﯽ دار ﮔﺮدﯾﺪ. وﻟﯽ اﺛﺮ زﻣﺎن ﭼﯿﻦ ﺑﺮداري ﺑﺮ ﮐﻠﯿﻪ ﺻﻔﺎت در ﺳﻄﺢ ﯾﮏ درﺻﺪ ﻣﻌﻨﯽ دار ﮔﺮدﯾﺪ. ﺑﺮرﺳﯽ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ ﺧﺸﮏ ﻧﺸﺎن داد رﻗﻢ ES ATHENA ﺑﺎ وﺟﻮد داﺷﺘﻦ ﺑﯿﺸﺘﺮﯾﻦ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ ﺧﺸﮏ داراي ﮐﻤﺘﺮﯾﻦ ﻣﯿﺰان ﻧﺴﺒﺖ ﺑﺮگ ﺑﻪ ﺳﺎﻗﻪ ﺑﻮد.

In order to investigate forage yield and its components in foreign cultivars of forage sorghum, an experiment was conducted in Khuzestan Agricultural and Natural Resources Research and Training Center in summer of 2018. This research was performed in the form of a split plot design (in time) in a randomized complete block, with three replications. Main plots was devoted a four hybrid (EUG542F, ES HARMATTAN, ES ATHENA and Speed feed) and subplot assigned to two defoliation times (September and November). The results showed that the effect of hybrids and interaction of treatments on all traits except of dry forage yield was significant. But the effect of defoliating times on all traits was significant at 1% level. Evaluation of dry forage yield revealed that ES ATHENA cultivar had the lowest leaf/stem ratio despite having the highest dry forage yield