بررسی اثر ساختار گیاهان چوبی بر عملکرد اکوسیستم های مرتعی
الموضوعات :
غلامعلی حشمتی
1
,
پریا کمالی
2
1 - استاد دانشگاه علوم کشاورزی و منابع طبیعی گرگان
2 - دانشجوی دکترای علوم مرتع دانشگاه علوم کشاورزی و منابع طبیعی گرگان
تاريخ الإرسال : 13 الخميس , محرم, 1436
تاريخ التأكيد : 07 الإثنين , شعبان, 1436
تاريخ الإصدار : 11 السبت , جمادى الأولى, 1437
الکلمات المفتاحية:
ساختار گیاهان چوبی,
ارزیابی سطح خاک,
integerrima Berberis,
Acantholimon erinaceum,
Onobrychis alba,
ملخص المقالة :
بررسی روابط بین پوشش گیاهی و خاک کمک شایانی به شناخت پتانسیل ها و عملکرد مراتع خواهد داشت. گونه های چوبی جز جدایی ناپذیر مراتع می باشند و نقش قابل توجهی در مشخصه های خاک مراتع دارند. تحقیق حاضر به منظور بررسی اثر ساختار گیاهان چوبی بر تغییرات عملکرد مراتع منطقه پرور در استان سمنان صورت گرفت. با استفاده از روش آنالیز عملکرد چشم انداز (LFA)[1]، 11 ویژگی سطح خاک در سه نوع از ساختار گیاهان چوبی (فشرده، نیمه فشرده و باز) در طول 3 ترانسکت صورت گرفت در طول هر ترانسکت 5 تکرار از هر نوع لکه اکولوژیک و نیز خاک لخت برداشت شد. سپس فاکتورهای اندازه گیری شده در قالب سه مشخصه پایداری، نفوذپذیری و چرخه عناصر غذایی در هر نوع ساختار طبقه بندی شد. نتایج نشان داد که گونه های چوبی با فرم فشرده تر نقش پررنگتری در بهبود شاخص های عملکرد مرتع از جمله پایداری، نفوذ پذیری و چرخه عناصر غذایی در مقایسه با ساختار نسبتا فشرده و نیز باز گونه های چوبی دارند. از طرفی هرچه ارتفاع گونه های چوبی کوتاه تر باشد نقش آنها در پایداری خاک بیشتر خواهد بود.
المصادر:
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