پديد آورنده :
رزازي، عارفه
عنوان :
استفاده از تراكم، آرايش كاشت و تنوع علف كش در مديريت تلفيقي علف هاي هرز مزارع ذرت دانه اي
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
دوازده ،102،[II]ص،مصور ،جدول ،نمودار
يادداشت :
ص.ع به : فارسي و انگليسي
استاد راهنما :
خورشيد رزمجو ،اسكندر زند
استاد مشاور :
پرويز احسان زاده
توصيفگر ها :
قياق , تاج خروس , سوروف , آترازين , اي پي تي سي , آلاكلر
تاريخ نمايه سازي :
18/1/87
استاد داور :
بيژن حاتمي ، محمد حسين اهتمام
تاريخ ورود اطلاعات :
1396/09/07
چكيده فارسي :
به فارسي و انگليسي : قابل رويت در نسخه ديجيتال
چكيده انگليسي :
Application of Density Varying Planting Patterns and Herbicides in Integrated Weed Management of Corn Zea mays L AbstractMaize is a major crop in Iran and its grain yield can be severely reduced by weedscompetition Integrated weed management is the best way to control the weed thathelps minimize herbicide application rate and resistance and costs for weed control Therefore in order to study the effect of planting patterns and herbicides combinationon corn yield and weeds of fields corn Zea mays L under competition conditions an experiment was conducted in 2007 at research field of Department of WeedResearch Plant Protection Research Institute Tehran using split plot design with 4replications Experimental factors were corn planting patterns in 4 different types onerow planting on each ridge with 74 000 plants ha 1 and two rows planting on eachridge with 74 000 92 500 and 111 000 plants ha 1 in main plot and 5 combinations ofherbicides 1 atrazin 1L ha plus EPTC 4L ha 2 atrazin 1L ha plus EPTC 5L ha 3 atrazin 1L ha plus EPTC 6L ha 4 atrazin 1L ha plus allachlor 5L ha 5 EPTC 6L ha in subplot Control plots were consist of complete hand weeding and none sprayed Sampling was implemented every two weeks from 0 225 squere meter surface Measured factors consisted of height leaf area and dry matter of corn and quantity kind and dry matter for weeds In final sampling yield and component yield calculatedand reported Results showed that under all planting patterns the complete handweeding control plots had the highest amount of leaf area index crop growth rate leafarea ratio net assimilation rate relative growth rate total dry matter yield hundredkernal weight number of rows on an ear and number of kernal per row But it had thelowest plant height Two rows planting on each ridge with 92 500 plants ha 1 reducedherbicide consumption because in this pattern there was no significant differentbetween reduced doze and normal doze Weeds population and biomass percentagereduction were the highest in two rows planting on each ridge with 92 500 plants ha 1that caused the highest yield in this pattern In addition two rows planting on eachridge with 92 500 plants ha 1 had highest leaf area index leaf area ratio crop growthrate net assimilation rate relative growth rate and total dry matter Herbicidescombination also had no significant effect on yield thought EPTC 6L ha had highesthundred kernal weight and second lowest plant height after hand weeding controlplots There were no significant different between one row planting on each ridgewith 74 000 plants ha 1 and two rows planting on each ridge with 111 000 plants ha 1on yield but in two rows planting on each ridge with 74 000 plants ha 1 atrazin1L ha plus EPTC 4 and 5 L ha with 7394 14 and 7499 77 kg ha 1 and in two rowsplanting on each ridge with 92 500 plants ha 1 atrazin 1L ha plus allachlor 5L ha with9360 04 had the second highest yield after complete hand weeding control Inconclusion and regards to the importance of integrated weeds management andreducing herbicide consumption two rows planting on each ridge with 92 500 plantsha 1 planting pattern and atrazin 1L ha plus allachlor 5L ha component of herbicide is suggested Key words corn planting pattern herbicide combination weed
استاد راهنما :
خورشيد رزمجو ،اسكندر زند
استاد مشاور :
پرويز احسان زاده
استاد داور :
بيژن حاتمي ، محمد حسين اهتمام
