ارزیابی تاثیر گونه‌های درختی و درختچه‌ای(کنار، کنارک و گون) بر شاخص‌های سطح خاک در مراتع قشلاقی (مطالعه موردی: مراتع سرچشمه خشاب در جنوب استان کهگیلویه و بویراحمد)

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشگاه آزاد اسلامی، واحد یاسوج، ایران

2 استاد، گروه مرتعداری، دانشکده مرتع و آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

چکیده

ارزیابی ویژگی‌های مهم خاک و پوشش گیاهی می‌تواند ما را از توانایی‌های بالقوه مرتع آگاه نموده و تعیین وضعیت آن را میسر سازد. مشخصه‌های سطح خاک به طور مستقیم بر پوشش گیاهی اثر دارند، از طرفی فاکتورهایی مانند گونه‌های گیاهی، فرم رویشی و تراکم پوشش مشخصه‌های خاک را تحت تاثیر قرار می‌دهد. لذا این تحقیق با هدف بررسی اثر گیاهان چوبی بر ویژگی‌های سطح خاک با استفاده از روش طبقه‌بندی خاک سطحی مرتع (SSCC) در مراتع سرچشمه خشاب انجام شده است. 11 ویژگی سطح خاک در لکه‌های گیاهی با فرم رویشی درختی (کنار) و درختچه‌ای (کنارک و گون) و مخلوطی از درخت و درختچه (کنار+کنارک) و فضای بین لکه‌های گیاهی(خاک لخت+لاشبرگ) در امتداد سه ترانسکت 70 متری در پنج تکرار اندازه‌گیری شد. سپس فاکتورهای اندازه‌گیری شده در قالب سه مشخصه پایداری، نفوذپذیری و چرخه عناصر غذایی برای هر لکه گیاهی طبقه‌بندی گردید. نتایج نشان داد مشخصه پایداری تفاوت معنی‌داری در بین لکه‌های مورد بررسی دارد که لکه مخلوط درخت و درختچه (کنار و کنارک) پایداری سطح خاک را بیشتر افزایش می‌دهند. شاخص نفوذپذیری تفاوت معنی‌داری را بین فرم درختچه (کنارک) و مخلوط درخت و درختچه (کنار و کنارک) نشان نداد. خاک دارای پوشش مخلوط(کنار و کنارک) شاخص چرخه عناصر غذایی بیشتری را نشان داد. پایداری زیاد خاک در لکه مخلوط درخت و درختچه‌ای (کنار و کنارک) در انتخاب گونه‌های گیاهی جهت کنترل بیولوژیک در مراتع قشلاقی جنوب کشور می‌تواند مورد استفاده قرار گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation effects of Tree and shrub species(ziziphus spina cristi, ziziphus numolaria and Astragalus fasciculifolius) on the Soil Surface Indices in Winter Rangelands (case Study: Khashab Stream Rangelands, Southern Kohgiluyeh and Boyerahmad)

نویسندگان [English]

  • Vahid Karimian 1
  • Gholamali Heshmati 2
1 Yasooj Branch of Islamic Azad University, Iran
2 Professor, Gorgan University of Agricultural Sciences & Natural Resources, Iran
چکیده [English]

Evaluation of important characteristics of soil and vegetation can inform us of the potentials of rangelands and determine the range condition. Soil surface characteristics directly affect vegetation.  On the other hand, factors such as plant species, vegetative form and density affect soil characteristics. Therefore, this study was aimed to evaluate the effects of woody plants on soil characteristics using rangelands soil classification method (SSCC) in Khashab rangelands. Eleven soil  surface indices within the plant patches of Ziziphus spina cristi and Ziziphus nummularia and Astragalus fasciculifolius as well as a mixture of trees and shrubs (Ziziphus spina cristi + Ziziphus nummularia) and interpatches (bare soil + litter) were measured along three transects  of 70 m in five replicates. Then the factors measured in terms of three indices of stability, infiltration and nutrient cycling for each patch were classified. The results showed significant differences for stability index among the study patches, so that Ziziphus spina cristi + Ziziphus nummularia could improve soil stability. Infiltration index did not show significant difference between Ziziphus nummularia and a mixture patch (Ziziphus spina cristi + Ziziphus nummularia). More soil stability in the mixed patch of trees and shrubs (Ziziphus spina cristi + Ziziphus nummularia) could be promising for biological control in south winter rangelands of the country.

کلیدواژه‌ها [English]

  • range
  • biological control
  • ziziphus spina cristi and Ziziphus nummularia. Stability
  • infiltration
  • nutrient cycling

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