كليدواژه :
دوره ﺑﺤﺮاﻧﯽ , ﻋﺪس , ﮐﻨﺘﺮل ﻋﻠﻒ ﻫﺎي ﻫﺮز , ﺗﺪاﺧﻞ ﻋﻠﻒ ﻫﺎي ﻫﺮز
چكيده فارسي :
اﯾﻦ ﻣﻄﺎﻟﻌﻪ در ﺳﺎل زراﻋﯽ 1395ﺑﺮاي ﺗﻌﯿﯿﻦ دوره ﺑﺤﺮاﻧﯽ ﮐﻨﺘﺮل ﻋﻠﻒ ﻫﺎي ﻫﺮز ﻋﺪس زﻣﺴﺘﺎﻧﻪ دﯾﻢ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮك ﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ ﭼﻬﺎر ﺗﮑﺮار اﻧﺠﺎم ﺷﺪ. آﻏﺎز و ﭘﺎﯾﺎن دوره ﺑﺤﺮاﻧﯽ ﮐﻨﺘﺮل ﻋﻠﻒ ﻫﺮز ﺑﺮاﺳﺎس ﮐﺎﻫﺶ ﻋﻤﻠﮑﺮد در ﺳﻄﺢ 2/5، 5، 10 و 15 درﺻﺪ ﻗﺎﺑﻞ ﻗﺒﻮل ﺑﻮد، ﮐﻪ اﯾﻦ ﺳﻄﻮح ﺑﻮﺳﯿﻠﻪ ﻣﺤﺎﺳﺒﻪ ﻫﺎي ﺑﻪ ﻣﻮﻗﻊ و ﻣﻌﺎدﻟﻪ ﮔﺎﻣﭙﺮﺗﺰ و ﻟﺠﺴﺘﯿﮏ از روي داده ﻫﺎي ﺣﺎﺻﻠﻪ از ﻋﻤﻠﮑﺮد ﻧﺴﺒﯽ ﺗﻌﯿﯿﻦ ﺷﺪﻧﺪ. ﻃﺒﻖ ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺶ دوره ﺑﺤﺮاﻧﯽ ﮐﻨﺘﺮل ﻋﻠﻒ ﻫﺎي ﻫﺮز ﺑﺮاي ﮐﺎﻫﺶ ﻗﺎﺑﻞ ﻗﺒﻮل ﻋﻤﻠﮑﺮد داﻧﻪ در ﺳﻄﺢ 2/5، 5، 10 و 15 درﺻﺪ ﺑﻪ ﺗﺮﺗﯿﺐ 57، 43، 26 و 14 روز ﺑﻮد. ﺑﺮاﺳﺎس ﻧﺘﺎﯾﺞ اﯾﻦ ﭘﮋوﻫﺶ ﺗﯿﻤﺎر ﺗﺪاﺧﻞ ﺗﻤﺎم ﻓﺼﻞ ﻋﻠﻒ ﻫﺎي ﻫﺮز در ﻣﻘﺎﯾﺴﻪ ﺑﺎ ﺗﯿﻤﺎر ﮐﻨﺘﺮل ﮐﺎﻣﻞ آﻧﻬﺎ ﻃﯽ ﻓﺼﻞ رﺷﺪ ﺳﺒﺐ ﮐﺎﻫﺶ 60 درﺻﺪي ﻋﻤﻠﮑﺮد داﻧﻪ ﻋﺪس ﺷﺪ. ﺑﻨﺎﺑﺮاﯾﻦ ﺗﺪاﺧﻞ ﻋﻠﻒ ﻫﺎي ﻫﺮز از ﺟﻤﻠﻪ ﻋﻮاﻣﻞ ﻣﻬﻢ ﻣﺤﺪودﯾﺖ ﺗﻮﻟﯿﺪ اﯾﻦ ﻣﺤﺼﻮل ﺑﻪ ﺷﻤﺎر ﻣﯽ رود. ﺣﺼﻮل ﺣﺪاﮐﺜﺮ ﭘﺘﺎﻧﺴﯿﻞ ﻋﻤﻠﮑﺮد ﻋﺪس ﻧﯿﺎزﻣﻨﺪ ﺣﺬف ﮐﺎﻣﻞ ﻋﻠﻒ ﻫﺎي ﻫﺮز ﻃﯽ ﻓﺼﻞ رﺷﺪ اﺳ. ﺖ دوره ﺑﺤﺮاﻧﯽ ﮐﻨﺘﺮل ﻋﻠﻔﻬﺎي ﻫﺮز در ﻋﺪس رﻗﻢ ﮔﭽﺴﺎران ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﺷﺮاﯾﻂ ﻣﺤﯿﻄﯽ ﻣﻨﻄﻘﻪ )در ﺳﻄﺢ اﺣﺘﻤﺎل 5% ﺧﺴﺎرت( از 11 ﺗﺎ 54 روز ﭘﺲ از ﺳﺒﺰ ﺷﺪن ﻣﯽ ﺑﺎﺷﺪ. ﺑﻨﺎﺑﺮاﯾﻦ ﻋﻠﻒ ﻫﺎي ﻫﺮز ﺑﺎﯾﺴﺘﯽ از ﻫﻔﺘﻪ اول ﭘﺲ از ﺷﺮوع ﻣﺮﺣﻠﻪ ي رﺷﺪ ﻣﺠﺪد ﮔﯿﺎه در ﻓﺼﻞ ﺑﻬﺎر ﺑﻤﺪت 8 ﻫﻔﺘﻪ ﺑﺮاي ﻋﺪس زﻣﺴﺘﺎﻧﻪ ﺟﻬﺖ اﺟﺘﻨﺎب از ﮐﺎﻫﺶ ﻋﻤﻠﮑﺮد ﺑﺎﻻي 5% ﮐﻨﺘﺮل ﺷﻮد.
چكيده لاتين :
This study was conducted in 2015 to determine the critical period of weed control (CPWC) in
dryland winter lentils in a randomized complete block design with four replications. Trial
treatments were kept six weed free for periods of 0, 10, 20, 30, 40, 50, or 70 day after emergence
(DAE), or weeds were allowed to grow before removal for periods of 0, 10, 20, 30, 40, 50, or 70
DAE. Beginning and end of the critical period of weed control and yield for test results acceptable
yield loss level 2.5, 5, 10 and 15 percent, respectively, 57, 43, 26 and 14 days .According to the
results in comparison with weed infested all season.They have complete control over the growing
season lentil yield was reduced by 60% .The weed interference important factors limiting
production is considered. Achieve maximum yield potential lentils require complete removal of
weeds during the growing season .The critical period for weed control in lentil varieties Gachsaran
the harsh climatic conditions (at the 5% level of damages) is from 11 to 54 days after
emergence. The weeds must first week after the start of the second stage of the plant in the spring,
winter lentils for 8 weeks to be controlled to avoid yield losses of 5%.
