تعیین ارزش رجحانی گونه‌های مورد چرای گوسفند نژاد لری در مراتع ییلاقی ارتفاعات بلومان (زاغه) لرستان به روش فیلمبرداری

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار پژوهشی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان لرستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، خرم آباد، ایران

2 استادیار، بخش تحقیقات مرتع، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

3 محقق، بخش تحقیقات مرتع، موسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

4 مربی پژوهشی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان لرستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، خرم آباد، ایران

چکیده

آگاهی از ارزش رجحانی گونه­های گیاهی، یکی از ملزومات اساسی جهت تعیین علوفه در‌دسترس و به تبع آن، محاسبه ظرفیت چرای رویشگاه­های مرتعی است. برای انجام پژوهش حاضر، 36 گونه شامل 21 گونه چند ساله و دائمی و 15 گونه یکساله مورد بررسی قرار گرفت. بدین منظور طی چهار سال (1386 -1389) و در هر ماه از فصل رویش (بهار و تابستان)، به مدت حداقل 1800 ثانیه از یک راس میش بالغ غیرآبستن و غیر شیرده نژاد لری لرستان با میانگین وزن‌50 کیلوگرم در داخل گله و در حال چرا، فیلمبرداری شد. نتایج نشان داد؛ گراس‌های یکساله مانند Heteranthelium piliferum, Bromus tectorum, Bromus danthonia, Boissiera squarrosa  با کل مدت زمان 3083 ثانیه نسبت به بقیه گونه­ها، بیشترین زمان چرا را بخود اختصاص داده­اند. گونه‌های بعدی شامل trichophorum Agropyron  با 2594 ثانیه، Bromus tomentellus با 1232 ثانیه Onobrychis melanotricha با 681 ثانیه، پهن‌برگان علفی یک‌ساله مانند Helianthemumledifolhum, Minuartia obtusiloba, talaspi perfoliatum, Diplotaxis erucoides, Viciea peregerinaبا 670 ثانیه وHordeum bulbosum با 565 ثانیه در رتبه های بعدی قرار گرفتند. در نهایت مشخص شد گندمیان یکساله و بوته‌ای‌ها در اردیبهشت، گندمیان پایا در خرداد و پهن برگان علفی در تیرماه دارای خوشخوراکی کامل و کلاس I می‌باشند. همچنین مجموع گندمیان و پهن‌برگان علفی پایا در تیرماه، پهن‌برگان علفی یکساله در اردیبهشت و بوته‌ای‌هادر خردادماه کلاس خوشخوراکی I‌I را دارا می‌باشند و فرم‌های رویشی در سایر ماه‌ها خوشخوراکی کلاس I‌I‌I را دارند.

کلیدواژه‌ها


عنوان مقاله [English]

An investigation of preference value of summer rangelands species in Blumann (Zagheh) in Lorestan By filming method

نویسندگان [English]

  • Reza Siahmansour 1
  • Mohammad Fayaz 2
  • Saeedeh Nateghi 2
  • Rostam Khalifehzadeh 3
  • Ali Mohammadian 4
1 Research Assisstant Professor, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran
2 Assistant Professor, Rangeland Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran
3 Senior Research Expert , Rangeland Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran.
4 Research Instructor, Lorestan Agricultural and Natural Resources Research and Education Center, AREEO, Khorramabad, Iran
چکیده [English]

Knowledge of preference value of plant species is one of the essential requirements for determining forage available and consequently, calculation of grazing capacity for rangeland habitats. This project was investigated in 36 species including of 21 perennials and 15 annuals species. For this purpose, during four-years period (2007-2010) in each month of the growing season (spring and summer) film was taken from a non-pregnant and non -lactating unit adult ewes (Lori)for at least 1800 seconds with an average weight of 50 kg inside the flock which were grazing in rangeland. Results indicated that annual grasses such as Boissiera squarrosa, Bromus danthonia, Bromus tectorum, Heteranthelium piliferum had the highest grazing time with a total duration of 3083 seconds compared to other species. Subsequent species including of Agropyron trichophorum with 2594 seconds, Bromus tomentellus with 1232 seconds, Onobrychis melanotricha with 681 seconds, broadleaf herbaceous annual such as Helianthemum ledifolhum, Viciea peregerina, Diplotaxis erucoides, talaspi perfoliatum, Minuartia obtusiloba with 670 second and Hordeum bulbosum with 565 second were ranked in the next. Finally, it was found that annual grasses and shrubs in May, perennial grasses in June, and broadleaf herbaceous annual in July have quite palatable and located in Class I. Also, total grasses and perennial forbs in July, annual forbs and shrubs in May and June have fairly palatable respectively which have located in class (II) and vegetative forms have palatable class III in other months.

کلیدواژه‌ها [English]

  • Growth form
  • time of grazing
  • alpine rangelands
  • Rangeland Plants
  • filming
  • choices for animals
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