نوع مقاله : مقاله پژوهشی

نویسندگان

1 اردبیل - پارس آباد، کیلومتر 17 جاده اصلاندوز - دانشکده کشاورزی و منابع طبیعی مغان

2 اردبیل – دانشگاه محقق اردبیلی - دانشکده کشاورزی و منابع طبیعی- گروه آبیاری

چکیده

به‌منظور بررسی تاثیر خاک اره و تنش آبی بر خصوصیات مورفولوژیکی ریشه و عملکرد خیار گلخانه‌ای (Cucumis sativus L. var. Nagen 972) ، آزمایشی در قالب طرح کاملا تصادفی با سه تکرار در دانشکده کشاورزی مغان انجام شد. فاکتور اصلی سطوح رطوبتی(I) (بدون تنش (شاهد)،  45، 65 درصد ظرفیت زراعی) و فاکتور فرعی، نسبت­های اختلاط خاک اره (SD) ( بدون خاک اره، 5، 10، 20 و 40 درصد حجمی خاک اره) بود. از میان تیمارهای مختلف خاک‌اره، تیمار 20 درصد موجب افزایش بیش‌تر وزن‌تر ریشه شد و این اختلاف با سایر تیمارها در سطح یک‌درصد بر اساس آزمون چند دامنه ای دانکن معنی‌دار گردید. پس از آن به‌ترتیب تیمارهای 10 ، 40، 5 و صفر درصد قرار گرفتند. بیش‌ترین طول ریشه مربوط به تیمار بدون خاک‌اره بود و پس از آن تیمار 10 درصد خاک‌اره در تخلیه رطوبتی 65 درصد قرار گرفت. همچنین  تیمار شاهد با 5 درصد خاک‌اره،  نیز دارای کمترین طول ریشه بود لیکن از نظر طول ریشه تمامی تیمارها در سطح یک‌درصد، در یک گروه قرار گرفتند. و با افزایش تخلیه رطوبتی از  صفر به 65 درصد ظرفیت زراعی، میزان عملکرد در تیمار بدون خاک‌اره، تقریبا 62 درصد کاهش یافت و در تیمار پنج درصد، میزان کاهش عملکرد به 55 درصد رسید. همچنین کاهش عملکرد در تیمارهای 10، 20 و 40 درصد خاک‌اره به‌ترتیب 18، 10 و 25 درصد برآورد شد.  بیش‌ترین عملکرد مربوط به تیمار 20 درصد در شرایط آبیاری کامل به میزان 134 تن در هکتار به‌دست آمد و تیمار40 درصد خاک‌اره  با 128 تن در هکتار در رتبه دوم قرار گرفت و در کلیه سطوح رطوبتی اعمالی، بالا بودن عملکرد تیمارهای خاک‌اره نسبت به تیمار شاهد مشاهده گردید، لذا در خاک شن-رس- لومی مورد مطالعه، استفاده از نسبت اختلاط 20 درصد خاک‌اره در شرایط آبیاری کامل و سطوح رطوبتی اعمالی، عملکرد بهتری دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of Mixing Ratio of Sawdust with soil on Yield and Root Morphological Characteristics of Greenhouse Cucumber (Cucumis sativus L.) in different Moisture levels

نویسندگان [English]

  • yaser hoseini 1
  • Fardin Nazari-Gigloo 2

1 Associate Professor of Moghan College of Agriculture & Natural Resources - University of Mohaghegh Ardabili - Ardabil – Iran

2 Graduated Master of Science (MSc), Water Engineering, University of Mohaghegh Ardabili, Ardabil, Iran

چکیده [English]

To study the effect of sawdust and different Moisture levels on morphological characteristics of greenhouse cucumber, an experiment was conducted in a complete randomized design with three replications in Moghan callege of agriculture. The main and secondary factors were different moisture levels (without stress, 45 and 65% of field capacity) and mixture ratios of sawdust (without sawdust, 5, 10, 20 and 40% sawdust content), respectively. Among different sawdust treatments, 20% sawdust resulted in higher weight of fresh root weigh, with a significant difference with other treatments at the level of 1% based on Duncan's multiple range test. 10, 40, 50 and zero percent of sawdust were ranked in the next order, respectively. The highest root length was observed in control, followed by the treatment of 10% sawdust mixture in 65% moisture level conditions. Also, non-stress treatment with 5% had the lowest root length, but in terms of root length, all treatments at the level of one percent, were placed in similar group. With increasing moisture depletion from 0 to 65%, the yield of 0% sawdust was reduced by approximately 62% of control treatment. And in the 5%, the yield reduction increased to 55%. Also, the yield reduction in 10, 20 and 40% sawdust was estimated at 18, 10 and 25%, of control treatment respectively. The highest yield was 134 tons per hectare obtained for control treatment in 20% and 40% with 128 tons per hectare was in second order and in all applied moisture depletion, the yield of sawdust treatments is higher than the control treatments. Therefore, in the studied sandy-clay-loam soil, using 20% of sawdust mixing ratio, in control treatment and applied moisture depletion, will have better performance.

کلیدواژه‌ها [English]

  • Fruit weight
  • Moisture deficit
  • Root length
  • Root volume
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