کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8973894 | 1552515 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Apparent digestibility and nitrogen utilisation of diets based on maize and grass silage fed to beef steers
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کلمات کلیدی
ADFGLMNDFacid detergent fibre - الیاف پاک کننده اسیدmetabolisable energy - انرژی قابل متابولیسمDigestible energy - انرژی قابل هضمgross energy - انرژی ناخالصMaize silage - سیلاغ ذرتGrass silage - سیلاکس چمنneutral detergent fibre - فیبر مواد شوینده خنثیorganic matter - ماده آلیdry matter - ماده خشکGeneral linear model - مدل خطی کلیApparent digestibility - هضم ظاهریAssociative - وابستهbodyweight - وزن بدنcrude protein - پروتئین خام
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Apparent digestibility and nitrogen utilisation of diets based on maize and grass silage fed to beef steers Apparent digestibility and nitrogen utilisation of diets based on maize and grass silage fed to beef steers](/preview/png/8973894.png)
چکیده انگلیسی
Substituting grass silage with maize silage in forage mixtures may result in one forage influencing the nutritive value of another in terms of whole tract nutrient digestibility and N utilisation. This experiment investigated effects of four forage combinations being, grass silage (G); 67 g/100 g grass silage + 33 g/100 g maize silage (GGM); 67 g/100 g maize silage + 33 g/100 g grass silage (MMG); maize silage (M). All diets were formulated to be isonitrogenous (22.4 g N/kg dry matter [DM]) using a concentrate mixture. Ration digestibility and N balance was determined using 7 Holstein Friesian steers (mean body weight 411.0 ± 20.9 kg) in a cross-over design. Inclusion of maize silage in the diet had a positive linear effect on forage and total DM intake (P = 0.001), and on apparent DM and organic matter digestibility (both P = 0.048). Regardless of the silage ratio used, the metabolisable energy concentration of maize silage was calculated to be higher than that of grass silage (P = 0.058), and linearly related to the relative proportions of the two silages in the forage mixture. Inclusion of maize silage in the diet resulted in a linear decline in the apparent digestibility of starch (P = 0.022), neutral detergent fibre (P < 0.001) and acid detergent fibre (P = 0.003). Nitrogen retention, expressed as amount retained per day or in terms of body weight (g/100 kg) increased linearly with maize inclusion (P = 0.047 and 0.046, respectively). Replacing grass silage with maize silage caused linear responses according to the proportions of each forage in the diet, and that there were no associative effects of combining forages.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 119, Issues 1â2, 7 March 2005, Pages 55-68
Journal: Animal Feed Science and Technology - Volume 119, Issues 1â2, 7 March 2005, Pages 55-68
نویسندگان
E.M. Browne, D.T. Juniper, M.J. Bryant, D.E. Beever,