پديد آورندگان :
ﺻﺎدﻗﯽ، ﺑﺮات ا... داﻧﺸﮕﺎه آزاد اﺳﻼﻣﯽ واﺣﺪ ﺑﯿﺮﺟﻨﺪ , ﺑﺮادران، رﺿﺎ داﻧﺸﮕﺎه آزاد اﺳﻼﻣﯽ واﺣﺪ ﺑﯿﺮﺟﻨﺪ , ﺻﺎﺑﺮي، ﻣﺤﻤﺪ ﺣﺴﯿﻦ ﺳﺎزﻣﺎن ﺗﺤﻘﯿﻘﺎت، آﻣﻮزش و ﺗﺮوﯾﺞ ﮐﺸﺎورزي - ﻣﺮﮐﺰ ﺗﺤﻘﯿﻘﺎت وآﻣﻮزش ﮐﺸﺎورزي و ﻣﻨﺎﺑﻊ ﻃﺒﯿﻌﯽ اﺳﺘﺎن ﺧﺮاﺳﺎن ﺟﻨﻮﺑﯽ - ﺑﺨﺶ ﺗﺤﻘﯿﻘﺎت اﺻﻼح وﺗﻬﯿﻪ ﻧﻬﺎل وﺑﺬر
كليدواژه :
ﻋﻠﻒ ﻫﺮز , دوره ﺑﺤﺮاﻧﯽ , ﭼﻐﻨﺪرﻗﻨﺪ , ﻋﻤﻠﮑﺮدﮐﻤﯽ و ﮐﯿﻔﯽ
چكيده فارسي :
ﺑﻪ ﻣﻨﻈﻮر ﺗﻌﯿﯿﻦ دوره ﺑﺤﺮاﻧﯽ ﮐﻨﺘﺮل ﻋﻠﻒﻫﺎيﻫﺮز ﭼﻐﻨﺪر ﻗﻨﺪ، آزﻣﺎﯾﺸﯽ در ﺳﺎل 1390 در ﻗﺎﻟﺐ ﺑﻠﻮكﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ 14 ﺗﯿﻤﺎر و ﭼﻬﺎر ﺗﮑﺮار در ﻣﺮﮐﺰ آﻣﻮزش ﺟﻬﺎد ﮐﺸﺎورزي ﻗﺎﯾﻨﺎت اﺟﺮا ﺷﺪ. ﺗﯿﻤﺎرﻫﺎي آزﻣﺎﯾﺸﯽ ﺷﺎﻣﻞ ﺗﺪاﺧﻞ ﻋﻠﻒﻫﺎيﻫﺮز ﺗﺎ 10 ،8 ،4،6 ،2 و 12 ﻫﻔﺘﻪ ﭘﺲ از ﮐﺎﺷﺖ و ﺳﭙﺲ ﮐﻨﺘﺮل ﻋﻠﻒﻫﺎيﻫﺮز ﺗﺎ ﭘﺎﯾﺎن ﻓﺼﻞ رﺷﺪ و ﮐﻨﺘﺮل ﻋﻠﻒﻫﺮز ﺗﺎ ﻣﺮاﺣﻞ ﻣﺬﮐﻮر و ﺳﭙﺲ ﺗﺪاﺧﻞ ﻋﻠﻒﻫﺎيﻫﺮز ﺗﺎ ﭘﺎﯾﺎن ﻓﺼﻞ رﺷﺪ و دو ﺷﺎﻫﺪ ﺑﺪون ﮐﻨﺘﺮل و ﮐﻨﺘﺮل ﮐﺎﻣﻞ ﻋﻠﻒﻫﺎيﻫﺮز ﺗﺎ ﭘﺎﯾﺎن ﻓﺼﻞ رﺷﺪ ﺑﻮد. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد دوره ﮐﻨﺘﺮل ﺑﺤﺮاﻧﯽ ﻋﻠﻒﻫﺎيﻫﺮزﭼﻐﻨﺪرﻗﻨﺪ ﺑﺮاي ﻣﻘﺎدﯾﺮ 10 ،5 ، 15 و 20 درﺻﺪ ﮐﺎﻫﺶ ﻣﺠﺎز ﻋﻤﻠﮑﺮد رﯾﺸﻪ ﺑﻪ ﺗﺮﺗﯿﺐ 10 ﺗﺎ 16 ،106 ﺗﺎ 80 ، 24 ﺗﺎ 78 و 31 ﺗﺎ 70 روز ﭘﺲ از ﮐﺎﺷﺖ و ﺑﺮ ﺣﺴﺐ ﻋﻤﻠﮑﺮد ﻗﻨﺪ ﻧﺎﺧﺎﻟﺺ و ﺧﺎﻟﺺ ﺑﻪ ﺗﺮﺗﯿﺐ 8 ﺗﺎ 112 ، 14 ﺗﺎ 95،22 ﺗﺎ 82 و 29 ﺗﺎ 74 روز ﭘﺲ از ﮐﺎﺷﺖ ﺑﻪدﺳﺖ آﻣﺪ. ﻧﺘﺎﯾﺞ ﺗﺠﺰﯾﻪ وارﯾﺎﻧﺲ ﺻﻔﺎت ﮐﻤﯽ و ﮐﯿﻔﯽ ﭼﻐﻨﺪرﻗﻨﺪ )ﻋﻤﻠﮑﺮد رﯾﺸﻪ، درﺻﺪ ﻗﻨﺪ ﻧﺎﺧﺎﻟﺺ ودرﺻﺪ ﻗﻨﺪ ﺧﺎﻟﺺ( ﻧﺸﺎن داد ﺑﯿﻦ ﺗﯿﻤﺎرﻫﺎي ﺗﺪاﺧﻞ و ﮐﻨﺘﺮل در ﺳﻄﺢ ﯾﮏ درﺻﺪ اﺧﺘﻼف ﻣﻌﻨﯽداري وﺟﻮد دارد. ﻫﻤﭽﻨﯿﻦ ﻧﺘﺎﯾﺞ ﺗﺠﺰﯾﻪ وارﯾﺎﻧﺲ ﻋﻤﻠﮑﺮد ﻣﺎده ﺧﺸﮏ ﻋﻠﻒ ﻫﺎيﻫﺮز ﻧﯿﺰ ﺣﺎﮐﯽ از اﺧﺘﻼف ﻣﻌﻨﯽداري ﺑﯿﻦ ﺗﯿﻤﺎرﻫﺎي ﺗﺪاﺧﻞ و ﮐﻨﺘﺮل در ﺳﻄﺢ ﯾﮏ درﺻﺪ ﺑﻮد. ﺗﺠﺰﯾﻪ وارﯾﺎﻧﺲ ﭘﺘﺎﺳﯿﻢ ﻧﺸﺎن داد ﺑﯿﻦ ﺗﯿﻤﺎرﻫﺎي ﺗﺪاﺧﻞ اﺧﺘﻼف ﻣﻌﻨﯽداري وﺟﻮد ﻧﺪاﺷﺖ وﻟﯽ در ﺑﯿﻦ ﺗﯿﻤﺎرﻫﺎي ﮐﻨﺘﺮل در ﺳﻄﺢ ﯾﮏ درﺻﺪ اﺧﺘﻼف ﻣﻌﻨﯽداري از ﻧﻈﺮ ﻣﻘﺪار ﭘﺘﺎﺳﯿﻢ وﺟﻮد داﺷﺖ. ﺑﺮاﺳﺎس ﻧﺘﺎﯾﺞ ﺣﺎﺻﻞ از اﯾﻦ آزﻣﺎﯾﺶ و درﺻﺪ ﮐﺎﻫﺶ ﻣﻮرد اﻧﺘﻈﺎر ﻋﻤﻠﮑﺮدرﯾﺸﻪ ﺷﺮوع دوره ﺑﺤﺮاﻧﯽ ﮐﻨﺘﺮل 10 ﺗﺎ 31 و ﭘﺎﯾﺎن آن 70 ﺗﺎ 106 روز ﭘﺲ از ﮐﺎﺷﺖ ﻣﯽﺑﺎﺷ
چكيده لاتين :
In order to investigate the critical period of weed control in sugar beet, an experiment was conducted during 2011-2012 in the experimental fields of Agricultural-Jihad training center of Qaen,. The experiment was conducted in a randomized complete blocks design with four replications using two series of different combinations of weed free and weed interference periods along with weedy and weed free checks as control. The first set of treatments were weed interference periods of 2, 4, 6, 8, 10 and 12 weeks after sugar beet planting, and the other set included weeding periods of above periods. Results showed the critical period of weed control based on 5, 10, 15, and 20% acceptable root yield reduction ranged between 10 - 106, 16 -80, 24 -78 and 31 -70 days after planting, respectively. A critical period of weed control for extractable sugar was observed to be 8 to 112 ,14 - 95, 22 - 82 and 29 - 74 days, after planting, respectively. The results showed significant difference between interference and weed free treatments on root yield extractable sugar, as well as weed dry weight. There was no significant difference for potassium content of sugar beet root among weed interference treatments, while it had significant difference among weed free treatments. In the results of this experiment the beginning of critical period control of weeds is 10 to 31 days and the end 70 to 106 days after planting.
