ارزیابی تأثیر مدیریت آبیاری و مالچ پلاستیکی بر بهره‌وری آب و عملکرد کمی و کیفی بادرنجبویه (Melissa officinalis L.)

نوع مقاله : مقالات پژوهشی

نویسندگان

• نیلوفر نجفی ایمن آبادی
• محمدعلی غلامی سفیدکوهی
• سعید شیوخی سوغانلو

گروه مهندسی آب، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

10.22067/jsw.2025.87779.1405

چکیده

امروزه نقش مدیریت آبیاری و استفاده از مالچ­های پلاستیکی در بستر کشت گیاهان باغی و دارویی با اهداف مختلفی مانند بهبود کیفیت و افزایش عملکرد بسیار حائز اهمیت می­باشد. از طرفی، اهمیت افزایش عملکرد کمی و کیفی گیاهان دارویی با توجه به شرایط کم­آبی حاضر، در گرو مدیریت آبیاری و شیوه­های کشت کارآمد می­باشد. به­منظور ارزیابی تأثیر مدیریت آبیاری و مالچ پلاستیکی بر بهره‌وری آب و عملکرد کمی و کیفی بادرنجبویه، آزمایش با آرایش کرت خرد شده بر پایه طرح بلوک­های کامل تصادفی با تیمارهای آزمایشی شامل؛ فاکتور اصلی مدیریت آبیاری (IM) با چهار سطح (IM100، IM80، IM60 و IM40) و فاکتور فرعی مالچ پلاستیکی (PM) با دو سطح (مالچ پلاستیکی سیاه (PM1) و بدون مالچ (PM0)) در 3 تکرار انجام شد. بر پایه یافته­ها، در شرایط مدیریت آبیاری IM100 و مالچ پلاستیکی سیاه، بیشترین میزان بهره­وری آب با 5/38 کیلوگرم بر متر مکعب و کمترین آن در IM40 و بدون مالچ پلاستیکی با 9/24 کیلوگرم بر متر مکعب مشاهده شد. همچنین بیشترین میزان محتوای نسبی آب برگ گیاه مربوط به شرایط مدیریت آبیاری IM100 با 3/74 درصد بود. نتایج نشان داد که وزن تر و خشک اندام هوایی، شاخص سطح برگ و تعداد شاخه­های جانبی بادرنجبویه نسبت به شرایط بدون مالچ، افزایش یافت. بیشترین میزان محتوای فنل و فلاونویید به­ترتیب با مقادیر 4/13 میلی­گرم اسید گالیک بر گرم و 6/14 میلی­گرم کوئرستین بر گرم مربوط به شرایط مدیریت آبیاری IM40 و بدون مالچ پلاستیکی بود. بیشترین درصد اسانس مربوط به شرایط آبیاری IM100 و IM80 به­ترتیب با 14/1 و 13/1 درصد بود و کمترین میزان آن در شرایط آبیاری IM40 با 53/0 درصد مشاهده شد. به­طور کلی، با توجه به بحران کمبود منابع آب و چالش کم­آبی، آبیاری تحت شرایط IM80 و استفاده از مالچ پلاستیکی سیاه در بستر کشت گیاه دارویی بادرنجبویه پیشنهاد می­گردد.

کلیدواژه‌ها

• اسانس
• دارویی
• شاخص سطح برگ
• کم‌آبی
• محتوای فنل

موضوعات

• علوم آب

عنوان مقاله [English]

Evaluation of Irrigation Management and Plastic Mulch Effects on Water Productivity and Quantitative and Qualitative Yield of Lemon Balm (Melissa officinalis L.)

نویسندگان [English]

• N. Najafi Iman Abadi
• M.A. Gholami Sefidkouhi
• S. Shiukhy-Soqanloo

Water Engineering Department, Faculty of Agricultural Engineering, Sari Agriculture Science and Natural Resources University, Sari, Iran

چکیده [English]

Introduction
Today, the crisis of water resources is one of the biggest challenges of human societies. Population growth and industrialization have increased the demand for water consumption. The agricultural sector is facing many problems to supply the required water resources. Irrigation management and the use of plastic mulches play a crucial role in raised-bed cultivation of horticultural and medicinal plants, serving various purposes such as enhancing quality and increasing yield. Moreover, given the current water scarcity conditions, improving the quantitative and qualitative yield of medicinal plants relies heavily on effective irrigation management and efficient cultivation practices.
 
Material and Methods
In this research, a split-plot experiment was conducted using a randomized complete block design (RCBD). The experimental treatments included: the main factor of irrigation management (IM) with four levels (IM100, IM80, IM60 and IM40) and the sub-factor of plastic mulch (PM) with two levels (black plastic mulch (PM1) and no mulch (PM0)) with 3 replications during the growth season 2022-2023 and was conducted at Sari Agricultural Sciences and Natural Resources University (SANRU), Iran. The dimensions of the experimental plot was arranged as 1.80 × 1.20 meters (length and width). Lemon balm was planted in rows with a spacing of 30 cm between plants and 40 cm between rows. Soil moisture was measured by weight method and irrigation was done manually with a sprinkler. In the end, the data obtained from measuring water productivity (WP), relative water content (RWC), essential oil content, morphological and biochemical characteristics of lemon balm were analyzed using ANOVA of SAS software. The Duncan multiple range post hoc test was employed to compare treatment means.
 
Result
Based on the findings, the interaction effect of irrigation management and plastic mulch on water productivity was significant. So, the IM100 conditions and PM1, the highest water productivity was observed with
38.5 kg.m^-3 and the lowest amount was related to IM40 and PM0 25 kg m^-3. The results showed that the simple effect of IM on the RWC in IM100 was very noticeable and obvious compared to other IMs. The highest (74.3%) RWC was observed in IM100, while the lowest RWC was related to IM40 (40.1%). In PM1, the highest amount of RWC (62.1%) was observed and the lowest amount was related to the PM0 (51.8%). The results showed that vegetative wet and dry weight, leaf area index (LAI) and the number of lateral branches of lemon balm increased under the IMs and PM1 affect compared to the control (PM0). The comparison of averages indicated that the highest wet and dry root weights were 217 kg ha^-1 and 140.8 kg ha^-1, respectively, observed in the IM100 treatment. Additionally, the highest wet and dry root weights under the plastic mulch treatment (PM1) were 151.1 kg ha^-1 and 108.5 kg ha^-1, respectively. The results also showed that the highest vegetative wet and dry weights were recorded at 647.2 kg ha^-1 and 231 kg ha^-1, respectively, in the IM100 treatment. Furthermore, the interaction effect of irrigation management (IM) and plastic mulch (PM) on the leaf area index revealed that the highest LAI value (2.8) was observed in the IM100 and PM1 combination. This was while the lowest value of the LAI was related to IM40 and PM0. The interaction effect of IM and PM on the number of lateral branches indicated that IM100 and PM1, the highest number of lateral branches (12) was generated. Based on the obtained results, the highest amount of phenol and flavonoids content were related to IM40 and PM0 with 13.4 mg.GA g^-1 and 14.6 mg.QU g^-1, respectively. While their lowest amount was observed under IM100 and PM1 with 10.2 mg.GA g^-1 and 11.8 mg.QU g^-1, respectively. Also, the results showed that the highest essential oil content was related to IM100 and IM80 conditions with 1.14% and 1.13 %, respectively, and the lowest was observed in IM40 condition with 0.53%.
 
Conclusion
The evaluation of the irrigation management and plastic mulch effects on water productivity and quantitative and qualitative yield of lemon balm showed that the use of plastic mulch by maintaining soil moisture and improving cultivation conditions, increased the vegetative growth and some qualitative characteristics. In general, due to the crisis of lack of water resources and the challenge of water scarcity, irrigation under IM80 conditions and the use of black plastic mulch in the rise-bed of lemon balm are suggested.

کلیدواژه‌ها [English]

• Essential oil
• Leaf area index
• Medicinal
• Phenol content
• Water deficit

©2024 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0).

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