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تتعیین شاخص تنش آبی (CWSI) جهت تشخیص زمان تنش آبی محصول ذرت در منطقه ارومیه | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 9، دوره 50، شماره 4، شهریور 1398، صفحه 873-884 اصل مقاله (576.28 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2018.261912.667967 | ||
| نویسندگان | ||
| افشین خورسند* 1؛ وحید رضاوردی نژاد2؛ حسین عسگرزاده3؛ ابوالفضل مجنونی هریس4؛ امیر رحیمی5؛ سینا بشارت6؛ علی اشرف صدرالدینی7 | ||
| 1کاندیدای دکتری آبیاری و زهکشی، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ارومیه، ایران | ||
| 2دانشیار، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ارومیه، ایران | ||
| 3استادیار، گروه علوم خاک، دانشکده کشاورزی، دانشگاه ارومیه، ایران | ||
| 4دانشیار، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه تبریز، ایران | ||
| 5استادیار، گروه زراعت، دانشکده کشاورزی، دانشگاه ارومیه، ایران | ||
| 6استادیار، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه ارومیه، ایران | ||
| 7استاد، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه تبریز، ایران | ||
| چکیده | ||
| دماسنج مادون‌قرمز از ابزارهای مناسب جهت تعیین زمان آبیاری است که می‌توان از آن در مزارع یا باغ‌هایی با بافت خاک مختلف استفاده نمود. به‌منظور برنامه‌ریزی آبیاری ذرت دانه‌ای (SC704) در شرایط اقلیمی منطقه ارومیه با استفاده از اختلاف دمای پوشش سبز گیاه و هوا تحقیقی در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه ارومیه تحت آبیاری قطره‌ای در فصل زراعی 1396 صورت گرفت. در این تحقیق اثر تیمارهای مختلف آب آبیاری مورد بررسی قرار گرفت. طرح آزمایشی در قالب طرح بلوک‌های کامل تصادفی با سه سطح آبیاری I1، I2 و I3 به ترتیب 50، 75 و 100 درصد نیاز آبی در سه تکرار اجرا گردید. بر اساس نتایج، مقادیر متوسط شاخص تنش آبی گیاه (CWSI) طی دوره رشد ذرت برای تیمارهای I1، I2 و I3 به ترتیب برابر 53/0، 44/0 و 28/0 محاسبه شد. نتایج نشان داد که با کاهش نیاز آبی، شاخص CWSI افزایش می‌یابد. حد آستانه شاخص تنش آبی (28/0) تیمار I3 که بدون تنش بود اساس برنامه‌ریزی آبیاری قرار گرفت. سپس روابطی برای تعیین زمان آبیاری ذرت دانه‌ای با استفاده از شاخص CWSI در اقلیم ارومیه برای ماه‌های تیر، مرداد و شهریور به ترتیب به صورت ، و ارائه گردید. | ||
| کلیدواژه‌ها | ||
| برنامه‌ریزی آبیاری؛ دمای پوشش سبز؛ دمای هوا؛ کم‌آبیاری؛ مادون قرمز | ||
| عنوان مقاله [English] | ||
| Determination of A Crop Water Stress Index (CWSI) For Detecting Water Stress time of Maize Crop in the Urmia Region | ||
| نویسندگان [English] | ||
| afshin khorsand1؛ Vahid Rezaverdinejad2؛ Hossein Asgarzadeh3؛ abolfazl Majnooni Heris4؛ amir rahimi5؛ Sina Besharat6؛ Ali Ashraf Sadraddini7 | ||
| 1Ph. D Candidate of Irrigation and Drainage, Department of Water Engineering, Urmia University, Iran | ||
| 2Associate Professor, Department of Water Engineering, Urmia University, Iran | ||
| 3Assistant Professor, Department of Soil Science, Urmia University, Iran | ||
| 4Associate Professor, Department of Water Engineering, Tabriz University, Iran | ||
| 5Assistant Professor, Department of Agriculture, Urmia University, Iran | ||
| 6Assistant Professor, Department of Water Engineering, Urmia University, Iran | ||
| 7Professor, Department of Water Engineering, Tabriz University, Iran | ||
| چکیده [English] | ||
| Infrared thermometer is one of the proper irrigation scheduling tools that can be used in fields or gardens with different soil texture. In order to schedule irrigation of maize (SC704) in Urmia climate conditions, using a difference in temperature of canopy cover of plant and air in 2017, a research was conducted at research farm of Urmia University college of agriculture under drip irrigation. In this research, the effects of various irrigation water treatments were investigated. The experimental design was carried out in a randomized complete block design with three levels of irrigation I1, I2 and I3 of 50, 75 and 100 percent of water requirement in three replications, respectively. Based on the results, the average values of CWSI for maize during the growth period for treatments of I1, I2 and I3 were calculated to be 0.53, 0.44 and 0.28, respectively. The results showed that the CWSI index increased with decreasing water requirement. The threshold of water stress index (0.28) of I3 treatment (no stress treatment) was the basis for irrigation scheduling. Then, some relationships were presented to determine the irrigation time of maize, using the CWSI index in Urmia climate for July, August and September as ,and respectively. | ||
| کلیدواژه‌ها [English] | ||
| Air temperature, Canopy temperature, Deficit irrigation, Infrared thermometer, Irrigation scheduling | ||
| مراجع | ||
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