تاثیر روشهای مبارزه با علفهای هرز و مقدار کود نیتروژن بر رشد و عملکرد ذرت شیرین
پذیرفته شده برای پوستر
عنوان دوره: سیزدهمین کنگره زراعت و اصلاح نباتات ایران
نویسندگان
چکیده
اﻳﻦ آزﻣﺎﻳﺶ ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﻲ اﺛﺮ ﻛﻮد ﻧﻴﺘﺮوژن و روشﻫﺎی ﻣﺒﺎرزه ﺑﺎ ﻋﻠﻒﻫﺎی ﻫﺮز ﺑﺮ رﺷﺪ و ﻋﻤﻠﻜﺮد ذرت ﺷﻴﺮﻳﻦ ﺑﺎ اﺳﺘﻔﺎده از 4 ﺳﻄﺢ ﻛﻮد ﻧﻴﺘﺮوژن ﺷﺎﻣﻞ ﺷﺎﻫﺪ (ﻋﺪم ﻛﺎرﺑﺮد ﻛﻮد)، 125، 250 و 375 ﻛﻴﻠﻮﮔﺮم در ﻫﻜﺘﺎر و ﺳﻪ روش ﻣﺒﺎرزه ﺑﺎ ﻋﻠﻒﻫﺎی ﻫﺮز ﺷﺎﻣﻞ ﻣﺒﺎرزه ﻣﻜﺎﻧﻴﻜﻲ (وﺟﻴﻦ ﺗﻮﺳﻂ ﻓﻮﻛﺎ) ﻣﺒﺎرزه ﺷﻴﻤﻴﺎﻳﻲ ﺑﺎ اﺳﺘﻔﺎده از ﻋﻠﻒﻛﺶ ﻓﻮرامﺳﻮﻟﻔﻮرون ﺑﺎ ﻧﺎم ﺗﺠﺎری اﻛﻮﺋﻴﺐ (Equib) و ﻣﺒﺎرزه ﺗﻠﻔﻴﻘﻲ (اﺳﺘﻔﺎده از روشﻫﺎی ﻣﻜﺎﻧﻴﻜﻲ و ﺷﻴﻤﻴﺎﻳﻲ) ﺑﻪ ﺻﻮرت آزﻣﺎﻳﺶ ﻓﺎﻛﺘﻮرﻳﻞ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮکﻫﺎی ﻛﺎﻣﻞ ﺗﺼﺎدﻓﻲ در 3 ﺗﻜﺮار در اﻳﺴﺘﮕﺎه ﺗﺤﻘﻴﻘﺎت ﻛﺸﺎورزی داﻧﺸﮕﺎه ﻋﻠﻮم ﻛﺸﺎورزی ﮔﺮﮔﺎن در ﺳﺎل 1390 اﺟﺮا ﺷﺪ. ﻧﺘﺎﻳﺞ ﻧﺸﺎن داد ﻛﻪ اﺛﺮ ﻣﻘﺪار ﻧﻴﺘﺮوژن ﻣﺼﺮﻓﻲ و روشﻫﺎی ﻣﺒﺎرزه ﺑﺎ ﻋﻠﻒﻫﺎی ﻫﺮز ﺑﺮ ﻣﻮﻟﻔﻪﻫﺎی ارﺗﻔﺎع ﺑﻮﺗﻪ، ﺷﺎﺧﺺ ﺳﻄﺢ ﺑﺮگ، دور ﺑﻼل، ﻃﻮل ﺑﻼل و ﻋﻤﻠﻜﺮد ﺑﻼل ﺗﺎزه ﺗﺎﺛﻴﺮ ﻣﻌﻨﻲداری داﺷﺘﻨﺪ، وﻟﻲ اﺛﺮ ﻣﺘﻘﺎﺑﻞ ﻣﻘﺪار ﻧﻴﺘﺮوژن ﻣﺼﺮﻓﻲ و روش ﻣﺒﺎرزه ﺑﺎ ﻋﻠﻒﻫﺎی ﻫﺮز ﺗﺎﺛﻴﺮ ﻣﻌﻨﻲداری ﺑﺮ ﻣﻮﻟﻔﻪﻫﺎی اﻧﺪازهﮔﻴﺮی ﺷﺪه ﻧﺸﺎن ﻧﺪاد؛ اﻓﺰاﻳﺶ ﻣﺼﺮف ﻧﻴﺘﺮوژن در زراﻋﺖ ذرت ﺷﻴﺮﻳﻦ ﺗﺎ 250 ﻛﻴﻠﻮﮔﺮم درﻫﻜﺘﺎرﺳﺒﺐ اﻓﺰاﻳﺶ اﻛﺜﺮ ﻣﻮﻟﻔﻪﻫﺎی رﺷﺪ و ﺑﻪ وﻳﮋه ﻋﻤﻠﻜﺮد ﺑﻼل ﺗﺎزه ﺷﺪ و ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ اﻳﻦ ﺑﺮرﺳﻲ، ﻣﻨﺎﺳﺐﺗﺮﻳﻦ روش ﻣﺒﺎرزه ﺑﺎ ﻋﻠﻒﻫﺎی ﻫﺮز اﺳﺘﻔﺎده از روش ﻣﺒﺎرزه ﺗﻠﻔﻴﻘﻲ ﺷﺎﻣﻞ ﺑﻪ ﻛﺎرﮔﻴﺮی ﻋﻠﻒﻛﺶ و وﺟﻴﻦ ﻣﻜﺎﻧﻴﻜﻲ ﺑﻮد.
کلیدواژه ها
Title
Effect of weed control methods and amount of nitrogen fertilizer on sweet corn
growth and yield
Authors
Abstract
This experiment was conducted to investigate the effect of nitrogen fertilization rates and weeding methods on the growth and yield components of sweet corn (Zea mays L. var. saccharata). Nitrogen fertilizer utilized at 4 levels including control (nitrogen was not used), 125, 250 and 375 kg/ha. Weeding method was at 3 levels including; mechanical by hoe, chemical by herbicide (Equip) and mixed of the 2 methods of mechanical and chemical. The factorial experiment was carried out based on randomized complete block design (RCBD) with 3 replications. The experiment was done in the research farm of Gorgan University of Agricultural Sciences and Natural Resources (GUASNR), located at 8 km of Gorgan-Kordkoy old road, in 2011. Results showed that increasing nitrogen fertilizer in the field of sweet corn up to 250 kg/ha led to increase majority of the measured traits, especially on the fresh yield of sweet corn. And also the appropriate method of weeding was the mixed method of the chemical and mechanical.
Keywords
Sweet Corn, Nitrogen, weeding methods, growth and yield