بررسی برخی خصوصیات خاک و مشخصات کمّی کُنار (Ziziphus spina- christi L. Desf) در رویشگاه‌های طبیعی جنوب‌غربی ایران، مطالعۀ موردی: استان‌های خوزستان و بوشهر

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس‌ارشد پژوهش، مؤسسۀ تحقیقات جنگل‌ها و مراتع کشور، تهران، ایران

2 دانشیار پژوهش، مؤسسۀ تحقیقات جنگل‌ها و مراتع کشور، تهران، ایران

3 کارشناس پژوهش، مرکز تحقیقات کشاورزی و منابع طبیعی خوزستان، اهواز، ایران

4 استادیار، دانشگاه تربیت مدرس، دانشکدۀ منابع طبیعی و علوم دریایی، نور، ایران

چکیده

به‌منظور بررسی برخی خصوصیات کمّی کنار و ویژگی‌های فیزیکی- شیمیایی خاک در توده‌های جنگلی طبیعی آن، نخست 10 تودۀ طبیعی از این گونه که از نظر اقلیمی و فرم زمین وضعیت نسبتاً مشابهی داشتند انتخاب شد. سپس ارتفاع از سطح دریا، قطر یقۀ قطورترین جست و ارتفاع کل کنار در قطعات نمونۀ ده‌آری و بررسی تجدید حیات دانه‌زاد این گونه در ریزقاب‌های یک‌آری دایره‌ای صورت گرفت. در هر قطعه نمونه، به‌منظور بررسی خصوصیات فیزیکی- شیمیایی خاک، نمونه‌برداری خاک از سه عمق 0- 30، 31- 50 و 51- 70 سانتی‌متری انجام گرفت. برای مقایسۀ مشخصات کمّی از آزمون‌های t-student، تجزیۀ واریانس یکطرفه و دانکن و به‌منظور بررسی ویژگی‌های خاک از آنالیز خوشه‌ای و تجزیۀ مؤلفه‌های اصلی (PCA) استفاده شد. نتایج نشان داد که ارتفاع از سطح دریا تأثیر معنی‌داری بر قطر و ارتفاع کنار ندارد. ارتفاع کل درختان کنار در رویشگاه‌های مختلف نیز فاقد اختلاف معنی‌دار بود. همچنین هرچند 60 درصد رویشگاه‌های کنار مورد بررسی در هر سه عمق خاک، تنها با درصد شن همبستگی داشتند، کمترین قطر یقه نیز در همین رویشگاه‌ها مشاهده شد. کنار در رویشگاه‌هایی که در لایه‌های سطحی با نیتروژن، کربن آلی و هدایت الکتریکی و در عمق با سیلت و رس همبستگی داشتند، از بیشترین قطر یقه برخوردار بود. بنابراین توصیه می‌شود به‌منظور افزایش موفقیت در استقرار کنار، چنین رویشگاه‌هایی برای جنگلکاری برگزیده شوند.

         

کلیدواژه‌ها


عنوان مقاله [English]

Some Soil and Quantitative Characteristics of Christ's thorn (Ziziphus spina christi L. Desf.) in Natural Sites of South West of Iran (Case study: Khouzestan and Booshehr provinces)

نویسندگان [English]

  • Pedram Ghadiripour 1
  • Khosro Sagheb Talebi 2
  • Mohammad Hassan Saleheh Shushtari 3
  • Omid Esmailzadeh 4
1 Senior Research Expert, Research Institute of Forests and Rangelands, Tehran, I.R. Iran
2 Associate Professor, Research Institute of Forests and Rangelands, Tehran, I.R. Iran
3 Research Expert, Khouzestan Agricaltural and Natural Resources Research Center, Ahvaz, I.R. Iran
4 Assistant Professor, University of Tarbit Modares, Faculty of Natural Resources and Marine Sciences, Noor, I.R. Iran
چکیده [English]

In order to investigate some silvicultural and soil physico-chemical characteristics of Christ's thorn (Ziziphus spina christi L. Desf.) natural stands, ten natural stands of the tree species which have similar climate and aspects were selected and altitude from sea level (ASL), the thickest sprout collar diameter (TSCD) and total tree height (TH) of the tree species were measured in 1000 m2 circular main plots. Seedling regenerations of the species were counted in 100 m2 circular microplots. We sampled soil from three depths of 0-30, 31-50 and 51-70 cm for studying on soil physico-chemical properties in each main plot. To compare means of tree quantitative characteristics, t-student, ANOVA and Duncan and for soil studying, CA and PCA were used. The results showed that TSCD and TH hadn't significant differences in two levels of ASL. Although there were an exclusive correlation between presence of the species and sand percent of all three layers of soil in around 60% of Christ's thorn sites, the minimum TSCD were recorded in the sites too. Christ's thorn had the maximum TSCD in sites correlated with N, OC and EC in shallow and percent of silt and clay in deep layers of soil. So for increasing success of Christ's thorn plantations we suggest such sites are selected.

کلیدواژه‌ها [English]

  • tree height
  • soil
  • Khouzestan
  • collar diameter
  • Ziziphus spina-christi
  • PCA
 

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