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اثر کم آبیاری با فاضلاب تصفیه شده شهری بر عملکرد ذرت | ||
تحقیقات آب و خاک ایران | ||
مقاله 3، دوره 49، شماره 3، مرداد و شهریور 1397، صفحه 505-514 اصل مقاله (912.16 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2017.214907.667531 | ||
نویسندگان | ||
ریحانه زارع میرک اباد* 1؛ تیمور سهرابی2؛ بابک متشرع زاده2 | ||
1دانشجو، پردیس کشاورزی و منابع طبیعی دانشگاه تهران | ||
2استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران | ||
چکیده | ||
بحران آب یکی از مسائل اساسی در مناطق خشک و نیمهخشک مانند ایران است. بنابراین استفاده از منابع آب نامتعارف، در جایی که آب با کیفیت مناسب در دسترس نیست، رو به فزونی است. ﻳﻜـﻲ ﺍﺯ ﺍﻳـﻦ ﻣﻨﺎﺑﻊ، فاضلاب تصفیه شده شهری ﺍﺳﺖ ﻛﻪ ﻋﻼﻭﻩ ﺑﺮ ﺗﺄﻣﻴﻦ ﺁﺏ میتواند ﻧﻴﺎﺯ ﻏﺬﺍﻳﻲ گیاه را نیز تأمین کند. این پژوهش با استفاده از طرح فاکتوریل در قالب طرح آماری کاملاً تصادفی بر روی گیاه ذرت با دو تیمار نوع آب آبیاری (فاضلاب تصفیه شده شهری و آب معمولی) و چهار سطح مقدار آب آبیاری شامل آبیاری کامل و کمآبیاری 80، 60 و 40% نیاز آبی گیاه و در سه تکرار انجام شد. نتایج تجزیه واریانس نشان داد که آبیاری با فاضلاب تصفیه شده شهری و آب معمولی تأثیر معنیدار بر وزن تر و خشک کل اندام هوایی محصول، وزن بلال، وزن تر و خشک ریشه، ارتفاع و قطر گیاه داشت، یعنی میزان رشد گیاه کاملاً وابسته به نوع آب برای آبیاری و احتمالاً حضور مواد مغذی و آلی در پساب است. نتایج بهدستآمده نشان داد آبیاری با فاضلاب تصفیه شده شهری سبب افزایش وزن تر و خشک اندام هوایی و ریشه گیاه نسبت به آب معمولی شد. همچنین با کاهش مقدار آب آبیاری وزن تر و خشک اندام هوایی و ریشه کاهش پیدا کرد ولی در مقایسه با آب معمولی این کاهش کمتر بوده است. وزن تر و خشک اندامهوایی ذرت آبیاری شده تحت تیمار 100% فاضلاب تصفیه شده شهری به ترتیب با 3/874 و 306 گرم بیشترین میزان بود و نسبت به تیمار 40% آب معمولی به ترتیب 5/45 و 2/59% افزایش را نشان داد. بنابراین کمآبیاری با فاضلاب نسبت به کمآبیاری با آب معمولی سبب افزایش معنیدار عملکرد این محصول شد. استفاده از منابع فاضلاب در کنار پایش دائمی کیفیت آنها توصیه میشود. | ||
کلیدواژهها | ||
ذرت؛ فاضلاب شهری؛ قطر ساقه؛ عملکرد | ||
عنوان مقاله [English] | ||
Effect of deficit irrigation with treated wastewater on corn yield | ||
نویسندگان [English] | ||
reyhaneh zare1؛ Teymour Sohrabi2؛ Babak Motesharezadeh2 | ||
1University College of Agriculture and Natural Resources, University of Tehran | ||
2University College of Agriculture and Natural Resources, University of Tehran | ||
چکیده [English] | ||
The water crisis is one of the fundamental issues in arid and semi arid regions like Iran. Therefore, the use of unconventional water resources, where good quality water is not available, is increasing. One of these resources is treated wastewater which in addition to the water supply can also provide some of plants nutritional requirements. The statistical design used for this study was a factorial design experiment based on a completely randomized factorial design having two types of irrigation water with four levels of plant water stress: absence of plant water stress (control), low stressed (80%), moderately stressed (60%), and severely stressed (40%) with three replications. Analysis of variance showed that irrigation with treated wastewater and normal water affects shoot wet and dry weights of crop, ear weight, root wet and dry weights and plant height and diameter. In other words, plant growth depends totally on the type of water for irrigation and possibly on presence of nutrients and organic matter in the wastewater. Results showed that irrigation with treated wastewater increased wet and dry weights of shoots and roots of corn. With exerting more water stress, wet and dry weights of shoot and root were reduced, however, this reduction in treated wastewater was lower when compared to normal water. Shoot wet and dry weights related to treated wastewater without stress (100%) had the highest values 874/3 and 306 respectively which show an increase of about 45.5 and 59.2%, respectively when compared to normal water under severely stressed condition (40%). Therefore, deficit irrigation with treated wastewater significantly increased the yield of corn rather than deficit irrigation with normal water.The use of treated sewage along with a permanent water quality monitoring network is recommended. | ||
کلیدواژهها [English] | ||
Corn, Wastewater, Stem diameter, Yield | ||
مراجع | ||
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