کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8491846 | 1552405 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fiber monosaccharides and digestibility of Milenio grass under N fertilization
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کلمات کلیدی
NFCNDFdADFdIVDMDIVOMDNDFCelADFacid detergent fiber expressed inclusive of residual ash - الیاف پاک کننده اسید بیانگر شامل خاکستر باقی مانده استhem - اوCell wall - دیوارهٔ یاختهCellulose - سلولزDigestibility - قابلیت هضمorganic matter - ماده آلیdry matter - ماده خشکPasture - مرتعneutral detergent fiber digestibility - هضم فیبر محلول پاک کنندهIn vitro organic matter digestibility - هضم ماده آلی درون in vitroIn vitro dry matter digestibility - هضم ماده خشک درون in vitrohemicellulose - همی سلولزPanicum maximum - پانکوم حداکثرcrude protein - پروتئین خامCarbohydrate - کربوهیدراتnonfiber carbohydrates - کربوهیدراتهای غیر خوراکی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fiber monosaccharides and digestibility of Milenio grass under N fertilization Fiber monosaccharides and digestibility of Milenio grass under N fertilization](/preview/png/8491846.png)
چکیده انگلیسی
Nutritive value of tropical forages is extremely dependent on management strategies adopted. The objective of this study was to evaluate the effects of N fertilization doses (0, 150, 300, or 450 kg N/ha/year) on chemical composition, in vitro digestibility, and neutral monosaccharides from cell walls of Panicum maximum Jacq. cv. IPR-86 Milenio. Grass samples were collected after 35 d of regrowth from paddocks managed under rotational stocking (35-d resting and 5-d occupation). All nutrient concentrations were affected by N fertilization, except ether extract. Although crude protein (CP) increased linearly with N dose, most nutrients were altered according to a quadratic trend. Each kilogram of N resulted in a 0.13 percentage unit increase in CP content (P < 0.01). Nitrogen fertilization led to a quadratic increase of cellulose (P < 0.01) and lignin (sa) (P < 0.01) and, thus, ADF content (P < 0.01). In contrast, hemicellulose was quadratically decreased (P < 0.01), resulting in lower contents of NDF with N application rates higher than 89.3 kg/ha/year (P < 0.01). For fiber monosaccharides, arabinose decreased quadratically (P < 0.01), following hemicellulose decrease. Hemicellulose is mainly composed of arabinose and xylose. Glucose content increased linearly with the N supply (P < 0.01), and hence, cellulose accumulation. The xylose content was unaffected by treatments. Glucose and xylose were quantitatively more important than arabinose in cell walls of Milenio grass. In vitro digestibilities of DM, OM, and ADF increased linearly with N fertilization (P < 0.01), whereas NDF digestibility followed a quadratic trend (P < 0.01), with a maximum response at 349 kg N/ha. Improvements in digestibility were also observed for neutral monosaccharides (P < 0.01). For all treatments, xylose was less digestible than arabinose and glucose. In conclusion, N fertilization increased CP content, stimulated the formation of glucose and arabinose in cell walls, leading to a higher forage quality. Forage quality was enhanced with N doses up to 300 kg/ha/year.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 183, Issues 1â2, 28 June 2013, Pages 17-21
Journal: Animal Feed Science and Technology - Volume 183, Issues 1â2, 28 June 2013, Pages 17-21
نویسندگان
F.P. Campos, P. Sarmento, L.G. Nussio, S.M.B. Lugão, C.G. Lima, J.L.P. Daniel,