مقایسه گرفتگی چند نوع قطره‌چکان داخل خط در اثر نفوذ ریشه تحت آبیاری قطره‌ای زیرسطحی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق دانشگاه صنعتی اصفهان دانشجوی ارشد شهر کرد

2 استادیار، دانشگاه صنعتی اصفهان، دانشکده کشاورزی، گروه آبیاری، تخصص: آبیاری/ مدل های گیاهی

3 دانشجوی سابق دانشگاه صنعتی دانشجوی ارشد دانشگاه اراک

4 دانشایار دانشگاه صنعتی اصفهان

چکیده

هدف این پژوهش بررسی میزان گرفتگی قطره‌چکان‌ها توسط ریشه در چهار نوع قطره‌چکان در آبیاری زیرسطحی چمن اسپرت بود. تیمارهای آزمایشی شامل چهار نوع قطره‌چکان با آبدهی متفاوت شامل 5/3، 4، 2/2 و 2 لیتر بر ساعت (به ترتیب T1، T2، T3 و T4) بود. تیمارهای آزمایشی در قالب طرح بلوک‌های کاملاً تصادفی در سه تکرار در مدت دو سال اجرا شد. بافت خاک سایت آزمایشی لوم رس سیلتی بود. شاخص‌های یکنواختی در ابتدا و انتهای آزمایش شامل شاخص تغییرات جریان (qvar)، ضریب تغییرات ساخت (CV)، ضریب یکنواختی پخش قطره‌چکان (CU)، یکنواختی پخش آب (EU) و یکنواختی آماری (Us) اندازه‌گیری شدند. مقدار شاخص EU قطره‌چکان‌ها برای تیمارهای T1، T2، T3 و T4 در ابتدای آزمایش به ترتیب برابر 96، 87، 94 و 94 درصد و در پایان آزمایش به ترتیب 79، 19، 45 و 85 درصد بود. در تیمارهای T1 و T4 (قطره‌چکان‌های پلاک دار) حدود 4% گرفتگی و در تیمارهای T2 و T3 (قطره‌چکان‌های استوانه‌ای) به ترتیب 24% و 36% درصد گرفتگی قطره‌چکان توسط ریشه مشاهده شد. قطره‌چکان‌های پلاک دار نسبت به قطره‌چکان‌های استوانه‌ای، کارایی بیشتری در برابر گرفتگی توسط ریشه چمن دارند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of Root Clogging for Different Inline Dripper under Subsurface Drip Irrigation of Grass

نویسندگان [English]

  • Marzieh Mohammadian 1
  • Mahdi Gheysari 2
  • Foroogh Fazel 3
  • Nematollah Etemadi 4
1
2
3
4
چکیده [English]

The objective of this study was to evaluate emitters clogging by root of grass for four types of inline emitters under subsurface drip irrigation system. The experimental treatments consisted of four discharge emitters include 3.5, 4, 2.2 and 2 liters per hour (respectively T3, T2, T1 and T4).  The four treatments were arranged in a randomized complete block design with three replications for two years.  The soil texture of site was silty clay loam. Uniformity indexes at the beginning and end of the experiment consists of emitter flow variation (qvar), coefficient of variation (CV), coefficient of uniformity (CU), emission uniformity (EU), Range and statistical uniformity (Us)were measured. The EU value was 96, 87, 94, and 94% for new emitter in the beginning of the experiment and was 79, 19, 45, and 85% in the terminated of the experiment for T1, T2, T3, and T4 treatments, respectively. Our results showed that emitter clogging by root were 4% for T1 and T4 treatments, 24% for T2 and 36% for T3 treatments. Based on the findings emitters that were installed in the pipe (flat integral drip line) was more efficient than the cylindrical tube emitters clogging rooted.

کلیدواژه‌ها [English]

  • Clogging emitters
  • drip line
  • local irrigation
  • uniformity index

مراجع

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تحقیقات آب و خاک ایران
دوره 47، شماره 3
آبان 1395
صفحه 529-537

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