ﻣﺪﻟﺴﺎزي ﺑﺮﻫﻤﮑﻨﺶ ﮐﻮد ﻧﯿﺘﺮوژن و دزﻫﺎي ﮐﺎﻫﺶ ﯾﺎﻓﺘﻪ ﻋﻠﻔﮑﺶ ﺑﺮ ﮐﺎﻫﺶ زﯾﺴﺖﺗﻮده ﺧﺮدل وﺣﺸﯽ در رﻗﺎﺑﺖ ﺑﺎ ﮔﻨﺪم

Modeling the interaction of nitrogen fertilizer and reduced herbicide doses on reduction of wild mustard biomass in competition with wheat

ﺑﻪﻣﻨﻈﻮر ﻣﺪﻟﺴﺎزي رﻗﺎﺑﺖ ﮔﻨﺪم - ﻋﻠﻒ ﻫﺮز ﺧﺮدل وﺣﺸـﯽ).Sinapis arvensis L( ﺑـﻪ ﺳـﻄﻮح ﻧﯿﺘـﺮوژن و دزﻫـﺎي ﮐـﺎﻫﺶ ﯾﺎﻓﺘـﻪ ﻋﻠﻒﮐﺶ ﻣﺰوﺳﻮﻟﻔﻮرونﻣﺘﯿﻞ+ ﯾﺪوﺳﻮﻟﻔﻮرون ﻣﺘﯿﻞ ﺳﺪﯾﻢ+ دﯾﻔﻠﻮﻓﻨﯿﮑﺎن + ﻣﻔﻦﭘﺎﯾﺮدياﺗﯿﻞ ﺑـﺎ ﻧـﺎم ﺗﺠـﺎري )اُﺗﻠﻠـﻮ اُو دي( آزﻣﺎﯾﺸـﯽ ﺑﻪﺻﻮرت ﮐﺮتﻫﺎي ﺧﺮدﺷﺪه در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮكﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ ﭼﻬﺎر ﺗﮑﺮار در داﻧﺸـﮕﺎه ﻋﻠـﻮم ﮐﺸـﺎورزي و ﻣﻨـﺎﺑﻊ ﻃﺒﯿﻌـﯽ ﺧﻮزﺳﺘﺎن اﻧﺠﺎم ﺷﺪ. ﮐﻮد ﻧﯿﺘﺮوژن ﺷﺎﻣﻞ ﭘﻨﺞ ﺳﻄﺢ ﺻﻔﺮ، 45، 90، 180 و 330 ﮐﯿﻠﻮﮔﺮم ﻧﯿﺘﺮوژن در ﻫﮑﺘﺎر ﺑﻪﻋﻨﻮان ﮐﺮت اﺻﻠﯽ و دز ﻋﻠﻒﮐﺶ اُﺗﻠﻠﻮ اُو دي در ﺷﺶ ﺳـﻄﺢ ﺻـﻔﺮ، 1/28 ،0/96 ،0/64 ،0/32 و 1/6 ﻟﯿﺘـﺮ در ﻫﮑﺘـﺎر )دز ﺗﻮﺻـﯿﻪ ﺷـﺪه ﻋﻠﻔﮑـﺶ1/6 ﻟﯿﺘـﺮ درﻫﮑﺘﺎر( ﺑﻪﻋﻨﻮان ﮐﺮت ﻓﺮﻋﯽ در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ زﯾﺴﺖ ﺗﻮده ﻋﻠﻒ ﻫﺮز ﺧﺮدل وﺣﺸﯽ در ﭘﺎﺳﺦ ﺑﻪ دز ﻋﻠـﻒﮐﺶ از ﻣﺪل دز- ﭘﺎﺳﺦ ﭘﯿﺮوي ﮐﺮد ﮐﻪ در واﮐﻨﺶ ﺑﻪ اﻓﺰاﯾﺶ ﻣﺼﺮف ﮐﻮد ﻧﯿﺘﺮوژن ﺗﻮﺳﻌﻪ ﯾﺎﻓﺖ. ﺑﺮ اﺳﺎس ﭘﯿﺶﺑﯿﻨﯽ ﻣﺪل ﺗﺮﮐﯿﺒﯽ، دﺳـﺘﯿﺎﺑﯽ ﺑﻪ زﯾﺴﺖ ﺗﻮده ﻋﻠﻒ ﻫﺮز ﺧﺮدل وﺣﺸﯽ در ﺣﺪود 10 ﮔﺮم در ﻣﺘﺮ ﻣﺮﺑﻊ ﺑﺎ ﮐﺎرﺑﺮد 230 ﮐﯿﻠﻮﮔﺮم ﮐﻮد ﻧﯿﺘﺮوژن در ﻫﮑﺘﺎر ﺑﻪ ﻫﻤﺮاه 1/2 ﻟﯿﺘﺮ از ﻋﻠﻒﮐﺶ و ﯾﺎ ﮐﺎرﺑﺮد 330 ﮐﯿﻠﻮﮔﺮم ﮐﻮد ﻧﯿﺘﺮوژن در ﻫﮑﺘﺎر ﺑﺎ 0/72 ﻟﯿﺘﺮ از ﻋﻠﻒﮐﺶ ﻣﻘﺪور ﺑﻮد.

In order to Modeling wheat- Sinapis arvensis L. competition to nitrogen levels and reduced herbicide doses of mesosulfuron methyl + iodosulfuron methyl sodium + diflufenican + mefenpyr-diethyl brand(othello OD) The experiment was conducted as split plots in a randomized complete block design with four replications at Agricultural Sciences and Natural Resources University of Khuzestan. Nitrogen fertilizer in cluded five levels of 0, 45, 90, 180 and 330 kg ha-1 of urea was considered as the main plot and the herbicide dose of “othello OD” in six levels of 0, 0.32, 0.64, 0.96, 1.28 and 1.6 L. ha-1 (1.6 L. ha-1 the recommended dose) was considered as the sub plot. The results showed that weed biomass. response to herbicide doses of dose- response a model, and developed in response to an increase in nitrogen fertilizer consumption. Based on the combined model, achieve about 10 g m-2 of weed biomass, using 230 kg ha-1 of nitrogen fertilizer plus 1.2 L. ha-1 herbicide dose, or applying 330 kg ha-1 of nitrogen fertilizer and 0.72 L. ha-1 herbicide dose.