نشریه علمی - پژوهشی مرتع و آبخیزداری

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مرتع و آبخیزداری، دانشکده منابع طبیعی و محیط زیست، دانشگاه بیرجند، بیرجند، ایران.

10.22059/jrwm.2023.356662.1696

چکیده

عمق کاشت بذر از جمله مهم‌ترین عوامل موثر بر سبز شدن یکنواخت گیاه و موفقیت کاشت محسوب می‌شود. این تحقیق با هدف تعیین عمق مناسب کاشت بذر درختچه Atriplex canescens در نهالستان اداره کل منابع طبیعی و آبخیزداری استان خراسان جنوبی انجام گردید، که از این طریق بتوان نهال‌های مطلوب با ویژگی‌های رویشی بهتر به منظور صرف هزینه کمتر در نهالستان تولید کرد. بدین منظور پس از جمع‌آوری و آماده سازی بذور آتریپلکس و گلدان‌ها، تعداد 15 عدد بذر در 5 عمق 1، 2، 3، 4 و 5 سانتی‌متر با 5 تکرار کاشته شد. پس از طی مراحل کاشت، درصد ظهور و صفات رویشی نهال اندازه‌گیری شد. داده‌ها توسط آزمون تحلیل واریانس (ANOVA) و آزمون LSD مورد تجزیه و تحلیل قرار گرفت. نتایج نشان داد که با افزایش عمق کاشت، کلیه خصوصیات مورد مطالعه کاهش معنی‌داری داشت (05/0≥p)، به طوریکه در عمق 4 و 5 سانتی‌متر به حداقل میزان خود رسید. بیشترین درصد ظهور (7/34 و 3/34 درصد) مربوط به عمق 1 و 2 سانتی‌متر و کمترین درصد ظهور نهال در اعماق 4 و 5 سانتی متر (4/2 درصد) مشاهده شد. از آنجایی که بین صفات درصد ظهور، شاخص بنیه نهال، طول و وزن ساقه نهال و محتوای رطوبت آتریپلکس کاشته شده در عمق 1 سانتی‌متر و 3 سانتی‌متر تفاوت معنی‌داری وجود ندارد، به دلیل تلفات بیشتر بذر در عمق سطحی خاک توسط شکارگرهای بذر مثل حشرات و پرندگان و خشک شدن سریع خاک در اثر تبخیر شدید آب در گلدان، کاشت بذر آتریپلکس در عمق 3 سانتی‌متر توصیه می‌شود.

کلیدواژه‌ها

عنوان مقاله [English]

Determining proper seed planting depth for fourwing saltbush (Atriplex canescens (Pursh) Nutt.)

نویسندگان [English]

  • Moselm Rostampour
  • Effat Akbari
  • Mohammad Saghari

Department of Rangeland and Watershed Management, Faculty of Natural Resources and Environment, University of Birjand, Birjand, Iran

چکیده [English]

The seed planting depth is one of the most important factors affecting the uniform plant emergence and the success of planting. This research was designed to determine proper seed planting depth for Atriplex canescens . in the nursery of the General Department of Natural Resources and Watershed Management of South Khorasan , allowing desirable seedlings with better vegetative properties to spend less cost in nurseries can be produced.For this purpose, after the collection and preparation of Atriplex canescens, seeds and pots, 15 seeds were selected and planted at 5 depths: 1, 2, 3, 4 and 5 cm with 5 repetitions. After the planting , the emergence percentage and vegetative traits of the seedling were measured. The data was analyzed by ANOVA and t LSD test. The results showed that with increasing seed planting depth, all the properties of the study were significantly reduced , at a minimum depth of 4 and 5 cm. The highest emergence percentage (34.7 % and 34.3 %) was observed at the depth of 1 and 2 cm and the lowest seedlings emergence percentage was observed at the depths of 4 and 5 cm (2.4 %). Since there is no significant difference between the emergence percentage, vigor index, and seedling stem length and weight, and the moisture content of the Atriplex canescens at the depths of 1 cm and 3 cm, Due to greater seed losses at the soil's surface depth by granivores such as insects and birds, as well as rapid drying of soil due to severe evaporation of water in the pot, A. canescens seed planting is recommended at a depth of 3 cm.

کلیدواژه‌ها [English]

  • Atriplex
  • emergence percentage
  • planting depth
  • seedlings
  • stem weight
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