ﺑﺮرﺳﯽ وﺿﻌﯿﺖ ﻋﻠﻒ ﻫﺎي ﻫﺮز در ﺗﺮاﮐﻢ ﻫﺎي ﻣﺨﺘﻠﻒ ﮐﺸﺖ آﻓﺘﺎﺑﮕﺮدان

Investigation of weeds status at different densities of Sunflower cultivation

آﻟﻮدﮔﯽ ﻋﻠﻒ ﻫﺮز ﯾﮑﯽ از ﻣﻬﻤﺘﺮﯾﻦ ﻋﻮاﻣﻞ از ﺑﯿﻦ رﻓﺘﻦ ﻋﻤﻠﮑﺮد داﻧﻪ آﻓﺘﺎﺑﮕﺮدان در ﺷﺮاﯾﻂ ﻣﻌﻤﻮل رﺷﺪ ﻣﯽ ﺑﺎﺷﺪ. ﻟﺬا ﺑﻤﻨﻈﻮر ﺑﺮرﺳﯽ وﺿﻌﯿﺖ ﻋﻠﻒ ﻫﺎي ﻫﺮز در ﺗﺮاﮐﻢ ﻫﺎي ﻣﺨﺘﻠﻒ ﮐﺎﺷﺖ در آﻓﺘﺎﺑﮕﺮدان، آزﻣﺎﯾﺸﯽ ﺑﺼﻮرت ﮐﺮت ﻫﺎي دوﺑﺎر ﺧﺮد ﺷﺪه در ﻗﺎﻟﺐ ﻃﺮح ﭘﺎﯾﻪ ﺑﻠﻮك ﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ اﺳﺘﻔﺎده از ﺳﻪ ﺗﮑﺮارو ﺳﻪ ﻓﺎﮐﺘﻮر ﺗﺮاﮐﻢ )،7 ،9 11و 13 ﺑﻮﺗﻪ در ﻣﺘﺮﻣﺮﺑﻊ(، ﮐﻮد ﻣﯿﮑﺮو )،0 1و 2 ﮐﯿﻠﻮﮔﺮم در ﻫﮑﺘﺎر( و رﻗﻢ )ﻓﻠﯿﮑﺲ، اي اس ﺷﮑﯿﺮا، اﺳﮑﺎر، اي اس ﺳﺎواﻧﺎ، ﺷﻤﺲ، ﺳﻮدﯾﻤﺎﻧﺲ، ﻣﻮﻧﺎﻟﯿﺰا( در ﺷﺮﮐﺖ ﺷﻬﯿﺪ رﺟﺎﺋﯽ ﺷﻬﺮﺳﺘﺎن دزﻓﻮل در ﺳﺎل زراﻋﯽ 1397-1398 اﺟﺮا ﮔﺮدﯾﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ ﺗﻌﺪاد و وزن ﺧﺸﮏ ﻋﻠﻒ ﻫﺎي ﻫﺮز از ﺗﺮاﮐﻢ ﮐﻢ ﺑﻪ زﯾﺎد ﺳﯿﺮ ﻧﺰوﻟﯽ ﭘﯿﺪا ﻣﯽ ﮐﻨﺪ، ﺑﻄﻮرﯾﮑﻪ ﺑﯿﺶ ﺗﺮﯾﻦ ﺗﻌﺪاد و وزن ﺧﺸﮏ ﻋﻠﻒ ﻫﺎي ﻫﺮز در ﺗﺮاﮐﻢ 7 ﺑﻮﺗﻪ در ﻣﺘﺮﻣﺮﺑﻊ ﺑﻪ ﺗﺮﺗﯿﺐ ﺑﻪ ﻣﯿﺰان 16/6 ﻋﺪد و 9/98 ﮔﺮم در ﻫﺮ ﻣﺘﺮﻣﺮﺑﻊ اﻧﺪازه ﮔﯿﺮي ﺷ.ﺪ ﻫﻤﭽﻨﯿﻦ در ﺑﯿﻦ ﮔﻮﻧﻪ ﻫﺎي ﻋﻠﻒ ﻫﺮز، اوﯾﺎرﺳﻼم ﺑﯿﺶ ﺗﺮﯾﻦ ﭘﺮاﮐﻨﺶ را در ﮐﺮت ﻫﺎي آزﻣﺎﯾﺸﯽ داﺷﺖ.

Weed infestation is one of the important causes destroy of sunflower grain yield under normal growing conditions. Therefore in order to investigate the status of weeds at different planting densities in sunflower, An split split plot experiment in a randomized complete blocks design with three replications and three factors density (7, 9, 11 and 13 plant/m2), Micro fertilizer (0, 1 and 2 kg/ ha) and Cultivar (Felix, ES Shakira, Oscar, ES Savana, Shams, Sudimance, Monaliza) carried out in the crop year 2018-2019 at Dezful Shahid Rajaei Company. The results showed that the number and Dry weight of weeds decreased from low to high density, So that Maximum number and Dry weight of weeds at a density of 7 plants/m2 the amount 16.6 pcs and 9.98 g/m2 measured respectively. Also among the weed species, Cyperus Sp had the most distribution in the experimental plots