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اثر مدیریت مصرف آب بر عملکرد و اجزای عملکرد گندم | ||
| تحقیقات مهندسی سازه های آبیاری و زهکشی | ||
| دوره 26، شماره 101، دی 1404، صفحه 64-49 اصل مقاله (564.37 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/idser.2026.372463.1645 | ||
| نویسنده | ||
| نادر نادری* | ||
| استادیار پژوهش، بخش تحقیقات فنی و مهندسی کشاورزی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان سمنان (شاهرود)، سازمان تحقیقات، آموزش و ترویج کشاورزی، شاهرود، ایران. | ||
| چکیده | ||
| به منظور ارزیابی تأثیر مدیریتهای کاهش مصرف آب آبیاری (دور و درصد آبیاری) بر ویژگیهای عملکردی گندم، آزمایشی طی سالهای ۱۳۹۸ تا ۱۴۰۰ در مرکز تحقیقات و آموزش کشاورزی سمنان (شاهرود) بهاجرا در آمد. طرح آزمایشی به صورت کرتهای خردشده و در قالب بلوکهای کامل تصادفی با سه تکرار در نظر گرفته شد. تیمارها شامل سه دور آبیاری (چهار، پنج و شش روز) در کرتهای اصلی و سه سطح تأمین آب شامل آبیاری کامل (۱۰۰ درصد نیاز آبی) و کمآبیاری (۸۰ و ۶۰ درصد نیاز آبی) در کرتهای فرعی بودند. تمامی مدیریتهای بهزراعی در تیمارها یکسان و آبیاری با سامانه بارانی تاشو اجرا شد. نتایج تجزیۀ مرکب نشان داد که دور آبیاری و اثر ترکیبی آن با سطح تأمین آب بر بیشتر صفات مورد بررسی اثر معنیدار دارد. بیشترین ارتفاع بوته، تعداد دانه در سنبله و وزن هزار دانه در دور آبیاری چهار روز ثبت شد، اما در عملکرد دانه و شاخص برداشت تفاوت معنیداری بین دورهای چهار و پنج روز مشاهده نشد. صفات ارتفاع بوته، تعداد دانه در سنبله، وزن هزار دانه، عملکرد دانه و شاخص برداشت در تیمارهای ۱۰۰ و ۸۰ درصد نیاز آبی در یک گروه آماری قرار گرفتند، در حالی که کاهش تأمین آب به ۶۰ درصد سبب کاهش 17/39 درصد در عملکرد دانه شد. بر اساس نتایج به دست آمده، تیمارهای دور آبیاری چهار و پنج روز همراه با ۸۰ درصد تأمین آب، مناسبترین مدیریت برای حفظ عملکرد گندم با کاهش مصرف آب بودند. نتایج تحقیق نشان داد که اِعمال ۸۰ درصد تأمین نیاز آبی همراه با دور آبیاری پنج روزه میتواند با حفظ عملکرد دانه در سطح آماری مشابه آبیاری کامل، گزینهای مناسب برای مدیریت بهینه مصرف آب در کشت گندم باشد. | ||
| کلیدواژهها | ||
| ارتفاع بوته؛ بارانی تاشو؛ دور آبیاری؛ شاخص برداشت؛ کمآبیاری | ||
| عنوان مقاله [English] | ||
| Impact of water consumption management on yield and yield components of wheat | ||
| نویسندگان [English] | ||
| Nader Naderi | ||
| Assistant Professor, Department of Agricultural Engineering Research, Agriculture and Natural Resources Research and Education Center of Semnan (Shahrood), Agricultural Research, Education and Extension Organization (AREEO), Shahrood, Iran. | ||
| چکیده [English] | ||
| Extend Abstract Introduction In order to increase water productivity, the use of modern methods of pressurized irrigation is one of the effective solutions. These methods can play an important role in conserving water resources by reducing water losses, increasing irrigation efficiency and allowing more accurate management of time and amount of applied water. Sprinkler irrigation is one of the suitable options for wheat fields in semi - arid regions. The Rain flat sprinkler irrigation system as a relatively new sprinkler method, requires less work pressure than conventional sprinkler methods and therefore energy consumption decreases. In addition, installation and operation of this system is simpler and faster and can be an appropriate option for irrigation management in water deficit conditions. Therefore, due to the limited water resources in Semnan province and the importance of wheat production and also for introducing the Rain flat sprinkler irrigation system, this study was conducted to investigate the effect of irrigation interval and different levels of water supply on yield and yield components of wheat. Methodology The aim of this study was to investigate the effect of irrigation interval and different water levels on yield and yield components of wheat in Rain flat sprinkler irrigation method for two years. The experiment was conducted as a split plot in randomized complete block design with three replications in Shahrud Agricultural Research and Education Center. Three irrigation intervals (4, 5 and 6 days) were allocated to main plots and three irrigation levels (100 ,80 and 60 %) in sub plots. Sprinkler irrigation pipes were placed at 4-meter intervals between planting rows. The length of planting rows was 8m. By using the Penman - Monteith method, water requirement of the plant was determined. At the end of growing season, wheat was harvested and yield was measured in each plot. Yield components including plant height, thousand grain weight and grains number per spike were determined for all treatments. Harvest index was calculated from the division of seed weight to total weight of vegetative and reproductive organs. Results and Discussion Results showed that the highest grain yield was achieved in irrigation interval of 4 and 5 days whereas irrigation interval of 6 days decreased yield. The effects of water supply, the treatments of 100 % and 80 % water supply had the highest yield and the 60 % water supply had the lowest yield. Therefore, it is possible to reduce water supply from 100 to 80 percent without significant reduction of yield, but decreases from 80 to 60 percent decrease grain yield by 39.17%. The interaction of interval and water supply showed that 4 days with 100 % water, 4 days with 80 % water and 5 days with 100 % water had the highest yield. The lowest yield belonged to 6 days with 60 % water, indicating a decrease of up to 60.35 % in adverse irrigation management. The highest plant height, grains number per spike and thousand grain weight was obtained in 4 days irrigation interval, but there was no significant difference between 4 and 5 days in grain yield and harvest index. Also, plant height, grains number per spike, thousand grain weight and harvest index were in the treatment 100 and 80 percent of water supply in the top group, while reducing water supply to 60 percent reduced the yield and its components significantly. The results show that in Rain flat sprinkler irrigation system, with appropriate management of irrigation interval and irrigation interval equal to 5 days and supplying 80 % water requirement, both yield and yield components can be maintained in desirable condition, while increasing irrigation interval or severe water reduction, both lead to significant decrease in yield and yield components. Conclusions The results of combined analysis showed that irrigation interval and its combined effect with water supply level had a significant effect on most of traits. The highest plant height, grains number per spike and thousand grain weight was recorded in 4 days irrigation interval, but there was no significant difference between 4 and 5 days in grain yield and harvest index. Also, plant height, grains number per spike, thousand grain weight, grain yield and harvest index were in 100% and 80% water supply in a statistical group, while reducing water supply to 60% reduced grain yield by 17.39%. Based on results, irrigation interval of 4 and 5 days with 80% water supply was the most suitable management to maintain wheat yield by reducing water use. The results of this study indicate that optimal water management in wheat cultivation can be achieved without yield reduction by reducing irrigation water by 20 percent and adopting a 5-day irrigation interval. | ||
| کلیدواژهها [English] | ||
| Deficit irrigation, Harvest index, Irrigation interval, Plant height, Rain flat | ||
| مراجع | ||
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