اثر تغییر کاربری مرتع به کشاورزی و پارک جنگلی بر برخی خصوصیات فیزیکی و شیمیایی خاک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد گروه علوم خاک، دانشگاه ملایر

2 استادیار گروه علوم خاک، دانشکده کشاورزی، دانشگاه ملایر

3 استادیار گروه مهندسی طبیعت، دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر

چکیده

هدف از این تحقیق بررسی برخی خصوصیات فیزیکی، شیمیایی و توزیع اندازه ذرات خاک در سه کاربری کشاورزی، مرتع و پارک جنگلی در دو عمق سطحی (15-0 سانتیمتر) و زیرسطحی(30-15 سانتیمتر) در شهر اشترنیان در استان لرستان می‌باشد. نمونه‌برداری در سه کاربری در 45 نقطه در دو عمق سطحی و زیرسطحی به طور کاملا تصادفی انجام شد. برخی خصوصیات فیزیکی و شیمیایی خاک در آزمایشگاه اندازه-گیری شدند. این آزمایش در قالب طرح فاکتوریل و به صورت کاملا تصادفی انجام گرفت. نتایج نشان داد تغییر کاربری مرتع به کشاورزی منجر به کاهش محتوی رس، ظرفیت تبادل کاتیونی، کربن آلی خاک، ازت و توزیع اندازه ذرات خاک شده است. تغییر کاربری مرتع به کاربری پارک جنگلی باعث افزایش میزان رس، سیلت و اسیدیته خاک گردید. مقایسه میانگین نشان داد که تفاوت معنی‌داری بین وزن مخصوص ظاهری و هدایت الکتریکی در سه کاربری وجود ندارد (p ≤ 0.01). بررسی داده‌ها نشان داد که ظرفیت تبادل کاتیونی خاک، کربن آلی، میزان رس و سیلت در بین سه کاربری و دو عمق دارای تفاوت معنی‌داری هستند (p ≤ 0.01). هم‌چنین کاربری اثر معنی‌داری بر روی شن و درصد آهک نشان داد (p ≤ 0.01). با تبدیل کاربری مرتع به پارک جنگلی دانه‌بندی خاک تغییری نکرد. افزایش میزان کربن آلی و رس خاک می‌تواند دلیل این امر باشد. بطور کل تغییر کاربری از مرتع به کشاورزی مشابه سایر تحقیقات نامطلوب، اما تغییر کاربری به پارک جنگلی باعث بهبود میزان رس، ظرفیت تبادل کاتیونی و کربن آلی خاک شده است

کلیدواژه‌ها


عنوان مقاله [English]

The effect of range land change to agriculture and forest park on some soil physicochemical characteristics

نویسندگان [English]

  • Ahmad Godarzi 1
  • Soheilasadat Hashemi 2
  • Behnaz Attaeian 3
1 Msc , Department of Soil Science, Faculty of Agriculture, Malayer University, Malayer, Iran
2 Assistant Professor, Department of Soil Science, Faculty of Agriculture, Malayer University, Malayer, Iran
3 Assistant Professor, Department of Nature Engineering, Faculty of Natural Resources and Environment, Malayer University, Malayer, Iran
چکیده [English]

The purpose of this research was investigation of soil physicochemical and particle distribution in three agricultures, rangeland and forest park land use in two surface (0-15 cm) and subsurface (15-30 cm) depths in Oshtorninan city on the Lorestan province. Soil sampling was done in 45 points in three land use. Some soil physico-chemical properties were determined in laboratory. This experiment was arranged in a factorial manner. The results showed that the change of rangeland use to agriculture has resulted in a decrease in clay content, cation exchange capacity, soil carbon, nitrogen and soil particle size. Changing the land use of pasture to forest park has led to an increase in the amount of clay, silt and soil acidity. Mean comparison showed that there was no significant difference between bulk density and electrical conductivity in the three land uses (p ≤ 0.01). Analysis of the data showed that the soil cation exchange capacity, organic carbon, clay and silt content in three land uses and two depths were significantly different (p ≤ 0.01). Land use factor also showed a significant different on soil sand and lime percentage (p ≤ 0.01). The soil granulation did not change with the conversion of the rangeland in to a forest. Increased organic carbon and soil clay content could be the reason for this. In general, land use change from pasture to agriculture similar to other research is unfavorable, but land use change to forest park has improved clay content, cation exchange capacity and soil organic carbon.

کلیدواژه‌ها [English]

  • Bulk density
  • Clay
  • Soil carbon
  • particles size distribution
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دوره 75، شماره 1
خرداد 1401
صفحه 91-102
  • تاریخ دریافت: 20 آذر 1400
  • تاریخ بازنگری: 15 فروردین 1401
  • تاریخ پذیرش: 20 فروردین 1401
  • تاریخ اولین انتشار: 01 خرداد 1401