نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری،گروه علوم دامی، دانشکده کشاورزی دانشگاه بیرجند، ایران

2 استاد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه بیرجند، بیرجند، ایران.

چکیده

در پژوهش حاضر، ترکیب شیمیایی و ارزش غذایی بقایای زراعی کینوا با استفاده از روش‌های آزمایشگاهی درون کیسه‌ای و تولید گاز اندازه‌گیری و با یونجه خشک مقایسه شد. گیاه کامل کینوا پس از برداشت از مزرعه در دمای محیط خشک و دانه‌ها جدا شدند و بقایای زراعی جهت انجام آزمایش‎ مورد استفاده قرار گرفت. نتایج نشان داد میزان انرژی خام، ماده خشک، ماده آلی، الیاف نامحلول در شوینده خنثی و لیگنین علوفه کینوا بالاتر از یونجه بود (0/05>P). غلظت پروتئین خام کینوا (12/29درصد) کمتر از یونجه (14/32درصد) بود. بخش عمده تانن موجود در کینوا از نوع قابل هیدرولیز بود. گرچه ثابت نرخ تجزیه و گوارش‌پذیری پس از شکمبه‌ای کینوا و یونجه یکسان بود، امّا گوارش‌پذیری شکمبه‌ای و کل دستگاه گوارش کینوا از یونجه کمتر بود (0/05>P). ثابت نرخ تولید گاز (c) بقایای زراعی کینوا و یونجه با هم برابر بودند، با این حال پتانسیل تولید گاز (b) آن از یونجه کمتر بود (0/05>P). گوارش‌پذیری ماده آلی، انرژی قابل سوخت‌و‌ساز و انرژی خالص شیردهی نیز در کینوا کمتر از یونجه بود (0/05>P). بر اساس نتایج این پژوهش، بقایای زراعی کینوا ظرفیت تغذیه‌ای مناسبی برای جایگزینی بخشی از علوفه به منظور تأمین قسمتی از نیازهای غذایی دام دارد. انجام آزمایش‌های درون تنی برای تعیین سطح مناسب آن در جیره کمک توصیه می‌شود.

کلیدواژه‌ها

عنوان مقاله [English]

Determination of chemical composition and estimate nutritional value of quinoa crop residues using nylon bag and gas production techniques

نویسندگان [English]

  • Navid Ghavipanje 1
  • mohammad hassan fathi nasari 2
  • Moslem Bashtani 2
  • Homayoun Farhangfar 2

1 Department of Animal Science, University of Birjand, Birjand, Iran

2 department of animal science birjand of university

چکیده [English]

In the present study, the chemical composition and nutritional value of quinoa crop residues were determined using insitu and invitro gas production techniques in comparison with alfalfa hay. After harvesting, whole quinoa plants were dried at environmental temperature, the seeds were separated, and the crop residues were used for the experiment. The results showed that the content of gross energy, dry matter, organic matter, neutral detergent fiber and lignin of quinoa was higher than alfalfa hay (P<0.05). Crude protein concentration of quinoa (12.29%) was lower than alfalfa hay (14.32%). The main part of the tannin in quinoa was hydrolysable. Although the degradation rate and post-ruminal digestibility of quinoa and alfalfa hay were similar, ruminal, and total tract digestibility of quinoa were lower than alfalfa hay (P<0.05). No significant differences were found in gas production rate (c) between quinoa and alfalfa hay, however, it’s gas production potential (b) was lower than alfalfa hay (P<0.05). Organic matter digestibility, metabolizable energy and net energy of lactation in quinoa crop residues were also lower than alfalfa hay (P<0.05). Based on the results of this study, quinoa crop residues have suitable nutritional potential for replacing part of the forage to meet part of the nutritional requirements of ruminant feeds. However, invivo studies are recommended to determine it’s appropriate level in the diet.

کلیدواژه‌ها [English]

  • crop residues
  • Degradability
  • digestibility
  • Dasiy II
  • In-vitro gas production
  • Quinoa

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