ﻣﻘﺎﯾﺴﻪ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ و ﺻﻔﺎت رﯾﺨﺖ ﺷﻨﺎﺳﯽ در ﻫﯿﺒﺮﯾﺪ ﻫﺎي ﺧﺎرﺟﯽ ﺟﺪﯾﺪ ﺳﻮرﮔﻮم ﻋﻠﻮﻓﻪ اي در زﻣﺎن ﻫﺎي ﻣﺨﺘﻠﻒ ﺑﺮداﺷﺖ

Comparison of forage yield and morphological traits in hybrids of foreign forage sorghum(Sorghum bicolor L. Moench) in different cutting times

ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ ﺗﺮ و ﺻﻔﺎت رﯾﺨﺖ ﺷﻨﺎﺳﯽ 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 ارﻗﺎمEUG542F, ES HARMATTAN, ES ATHENA و Speed Feed ﺑﻮد. ﮐﺮت ﻓﺮﻋﯽ ﻧﯿﺰ در دو ﺳﻄﺢ ﺷﺎﻣﻞ ﭼﯿﻦ ﺑﺮداري در 5 ﺷﻬﺮﯾﻮر و 5 آﺑﺎن ﺑﻮد. ﺑﺮرﺳﯽ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ ﺗﺮ ﻧﺸﺎن داد ﺗﻨﻬﺎ اﺛﺮ ﭼﯿﻦ در ﺳﻄﺢ ﯾﮏ درﺻﺪ ﻣﻌﻨﯽ دار ﮔﺮدﯾﺪ و ﺑﯿﺸﺘﺮﯾﻦ ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ ﺗﺮ از ﭼﯿﻦ اول ﺑﻪ ﻣﻘﺪار 5448/7 ﮔﺮم در ﻣﺘﺮ ﻣﺮﺑﻊ ﺑﺪﺳﺖ آﻣﺪ. ﺳﺎﯾﺮ ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد اﺛﺮ ﺗﯿﻤﺎرﻫﺎي آزﻣﺎﯾﺶ ﺑﺮ ﺗﻌﺪاد ﮔﺮه ﻣﻌﻨﯽ دار ﻧﮕﺮدﯾﺪ وﻟﯽ ﺑﺎﻟﻌﮑﺲ اﺛﺮ ﺗﻤﺎﻣﯽ ﺗﯿﻤﺎرﻫﺎي آزﻣﺎﯾﺶ ﺑﺮ ﻗﻄﺮ ﺳﺎﻗﻪ ﻣﻌﻨﯽ دار ﮔﺮدﯾﺪ.

In order to comparison of sorghum new hybrid with speed feed variety, this experiment was carried out at the research farm of Khuzestan Agricultural and Educational Research Center insummer 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). Results obtained from comparison of means showed that Defoliation effects have significant on fresh forage yield within a probability level of 1%. The highest fresh forage yield (5448.7 g/m2) was obtained from the first cut. The other results revealed that the whole of treatment effects did not have any significant effect on number of nodes. But the whole of treatment effects have significant on stem diameter.