بررسی ویژگی های فیزیکی خاک 11 سال پس از ساخت جوی-پشته بر روی مسیرهای چوبکشی

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه‌سرا، ایران

2 دانشیار، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه‌سرا،‎ ‎ایران

3 دانشیار، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه‌سرا، ایران

4 استاد، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه‌سرا، ایران

چکیده

شناخت راهکارهایی برای بازیابی خاک مسیرهای چوبکشی ضروری است. یکی از فعالیت‌های مدیریتی برای اصلاح کوبیدگی و جلوگیری از فرسایش، احداث جوی­پشته در مسیرهای چوبکشی است. بازیابی ویژگی­های فیزیکی خاک 11 سال پس از احداث جوی-پشته بر روی مسیرهای چوبکشی در قطعات 40 مترمربعی در قالب دو طبقه شیب (کمتر از 10 درصد و بیشتر از 10 درصد) و سه طبقه ترافیک (کم، متوسط و شدید) در جنگل­های سری ناو در غرب استان گیلان بررسی شد. متغیرهای موردبررسی شامل وزن مخصوص ظاهری، تخلخل، نفوذپذیری و عمق شیار بود. اندازه­گیری نفوذپذیری خاک با استفاده از پنترومتر جیبی، نمونه‌برداری مربوط به وزن مخصوص ظاهری با استفاده از سیلندر و اندازه‌گیری شیار با استفاده از شاخص 5 متری انجام شد. شاخص­های موردبررسی در هر تیمار، در سه تکرار مورد تحقیق قرار گرفتند. تأثیر تغییرات شیب و ترافیک بر روی ویژگی­های فیزیکی خاک بر روی 72 نمونه انجام شد. نتایج نشان داد که اثر شیب، ترافیک و اثر متقابل آن‌ها بر روی متغیرهای وزن مخصوص ظاهری، درصد تخلخل، نفوذپذیری و عمق شیار معنی‌دار است. مقدار وزن مخصوص ظاهری، تخلخل و نفوذپذیری در طبقه شیب کم و ترافیک کم بازیابی شده بود و بین این طبقه با طبقه‌های شاهد تفاوت معنی‌داری مشاهده نشد. نتایج پژوهش اثر مثبت ساخت جوی-پشته در بازیابی ویژگی­های خاک در مسیرهای چوبکشی را مسیرهای با ترافیک و شیب کم نشان داد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of soil physical properties 11 years after water-bar construction on skid trail

نویسندگان [English]

  • Mahsa Hashemi 1
  • Mehrdad Nikooy 2
  • Ali Salehi 3
  • Ramin Naghdi 4
1 Ph.D. Student of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, I. R. ‎Iran‎
2 Associate Professor, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, I. R. Iran‎
3 Associate Professor, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, I. R. Iran‎
4 Professor, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, I. R. Iran
چکیده [English]

It is necessary to find solutions for soil recovery of skid trail. Water-bar construction is one of the ‎best management practices to improve the compaction and prevent the erosion of skid trail soil. ‎Recovery of soil physical properties 11 years after water-bar construction on skid trail was ‎investigated on 40 square meter sample plots in two slope (0-10% and 10-20%) and three traffic ‎classes (Low, Medium, High) in the forests of Nav district in the west of Guilan province. The ‎studied variables included soil bulk density, total porosity, penetration resistance and rutting depth. ‎Soil bulk density, penetration, and rutting depth were measured by steel cylinder, pocket ‎penetrometer, and a 5-m leveling rod. The parameters in each treatment were studied in three ‎replications. The effect of slope and traffic variation on soil physical properties was performed on 72 ‎sample plots. The results showed that the effect of slope, traffic and their interaction were ‎significant on soil bulk density, total porosity, penetration resistance, and depth of rutting. The ‎value of soil bulk density, total porosity, and penetration resistance in LSLT (Low Slope-Low ‎Traffic) class was recovered, and there was no significant difference between this class and the ‎control area. The results of the study showed a positive effect of water-bar construction on the ‎recovery of soil properties in skid trail with low slope and low traffic.

کلیدواژه‌ها [English]

  • bulk density
  • water-bar
  • Soil physical properties
  • rutting depth
  • penetration resistance
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