همکاری با انجمن علمی مدیریت و کنترل مناطق بیابانی ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مربی پژوهش، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اصفهان، ایران

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

3 استادیار پژوهش ، بخش تحقیقات منابع طبیعی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اصفهان، ایران

4 استادیار پژوهش، بخش تحقیقات علوم زراعی- باغی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اصفهان، ایران

چکیده

به منظور بررسی عملکرد علوفه، بذر و اجزاء عملکرد دو گونه از گیاه استپی، 16 جمعیت از گونهStipa barbata  و 10 جمعیت از گونه
 Stipa hohenackeriana از رویشگاه‏های اصلی آنها در استان اصفهان جمع آوری گردید و در قالب طرح کاملا تصادفی با 3 تکراردر شرایط زراعی مورد ارزیابی قرار گرفت. تفاوت بین میانگین دو گونه برای اغلب صفات مهم مانند عملکرد علوفه و بذر معنی‏دار بود. جمعیت رحمت آباد از گونه S. hohenackeriana و جمعیت پل کله از گونه S. barbata با عملکرد علوفه به ترتیب معادل 3333 و 3129 کیلوگرم در هکتار، به عنوان جمعیت‏های برتر از نظر این صفت شناسایی شدند. پنج مولفه اول در تجزیه به مولفه‏های اصلی، 73 درصد از کل واریانس متغیرها را توجیه کرد که عامل اول عامل عملکرد، عامل دوم و سوم عوامل رویشی، عامل چهارم عامل اجزاء عملکرد و عامل پنجم به صفت نسبت وزن خشک به تر اختصاص داشت. تجزیه خوشه‏ای، جمعیت‏های دو گونه را در دو گروه متفاوت قرار داد که این گروه‏ها از نظرعملکرد علوفه و عملکرد بذر تفاوت معنی‏داری داشتند.

کلیدواژه‌ها

عنوان مقاله [English]

The study of morphological variation in populations of Stipa barbata var. arabica and Stipa hohenackeriana of Esfahan

نویسندگان [English]

  • Leili Safaie 1
  • Farhang Ghasriani 2
  • Babak Bahreyni Nejad 3
  • Hosein Zeinal 3
  • Davod Afiuni 4

1 Research Instructor, Research Division of Natural Resources, Isfahan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Isfahan, Iran

2 Associate Professor, Rangeland Research Division, Research Institutes of Forest and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran

3 Associate Professor, Research Division of Natural Resources, Isfahan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Isfahan, Iran

4 Assistant Professor, Horticulture Crops Research Department, Isfahan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Isfahan, Iran

چکیده [English]

In order to study forage yield, seed yield and its components in two species of Stipa, 16 genotypes of S. barbata  and 10 genotypes of S. hohenackeriana were collected from natural habitats in Esfahan province and evaluated with a completely randomized design with three replications in farm condition. Based on the results, there was a significant difference between two species for most of the important traits such as forage yield and seed yield. Rahmat Abad Khansar population of S.hohenackeriana and Polkale population of S. barbata showed higher forage yield (3333 and 3129 kg/ha, respectively). The first five components determined 73% of total variation. The first component named as yield factor, the second and the third factors as vegetative factors, the forth component as yield component factor and the fifth factor as dry weight/wet weight. Cluster analysis classified populations into two groups with distinct variations for seed yield and forage yield.
 

کلیدواژه‌ها [English]

  • Stipa
  • yield
  • Principal components analysis and Cluster analysis
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