کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6326833 | 1619761 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bioavailability of selenium in 'Jose' tall wheatgrass (Thinopyrum ponticum var 'Jose') hay as a substitute for sodium selenite in the diets of dairy cattle
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
TWGaNDFomNDFFDAADFSeCysDDGSSeO2TMRNDFomNRCDairy Herd Improvement AssociationSCCEDTA - اتیلن دی آمین تترا استیک اسید Ethylenediaminetetraacetic acid - اتیلینیدامین تتراستیک اسیدacid detergent fiber - الیاف پاک کننده اسیدTall wheatgrass - بلند گندم گراSomatic cell count - تعداد سلول های سوماتیکSeMet - خودشانSelenium dioxide - دی اکسید سلنیومFood and Drug Administration - سازمان غذا و داروSelenomethionine - سلنمتینیونSelenocysteine - سلنوسیستینsodium selenite - سلنیت سدیمSelenium - سلنیومNational Research Council - شورای تحقیقات ملیether extract - عصاره اترorganic matter - ماده آلیdry matter - ماده خشکSelenium supplementation - مکمل سلنیومSpecific gravity - وزن مخصوصwet weight - وزن مرطوبcrude protein - پروتئین خامtotal mixed ration - کل جیره مخلوط شده
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Due to its potential toxicity to wildlife, selenium (Se) is a highly regulated trace element in the San Joaquin Valley (SJV) of California. Tall wheatgrass (TWG) is a Se-accumulating, salt tolerant forage suitable for cropping systems which re-use agricultural drainage waters. Utilization of TWG hay as an alternative Se supplement for dairy cattle could reduce the importation of 'new' Se into the SJV in the form of sodium selenite (SS) diet supplements. Our study used Se-enriched (4.65Â mg/kg DM) TWG hay as a Se source for lactating dairy cows and measured Se accumulation in milk, blood, urine and feces to assess its bioavailability using several indices. Using a 3Â ÃÂ 3 Latin Square design, three pens of ~Â 310 cows each were fed a similar total mixed ration over 4Â week periods, except for Se which was higher in TWG and SS diets (0.53 and 0.65Â mg/kg DM) vs. Control diet (0.35Â mg/kg DM). Feeding Se-enriched TWG increased blood Se by 6.4% over Control; whereas SS increased it by 4.8%, suggesting higher Se bioavailability for TWG vs. SS. Marginal Se outputs in milk, feces and urine were judged to be better indicators of bioavailability as they estimate Se specifically from supplemental SS or TWG hay. In milk, TWG cows expressed 3.0% of supplemented Se vs. 0.6% for SS cows, supporting higher Se bioavailability for TWG. In contrast, more supplemental Se was retained and not expressed in feces by the SS cows (72.5%) vs. TWG cows (55.1%) which suggested higher Se bioavailability for SS. Based on published guidelines, Se intakes were 'adequate' for cows in all treatment groups, but milk and fat production increased with Se supplementation suggesting that Control cows were Se-deficient to some extent. Collectively, results suggest that the Se in TWG hay had comparable bioavailability to Se in the base diet.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 518â519, 15 June 2015, Pages 159-167
Journal: Science of The Total Environment - Volumes 518â519, 15 June 2015, Pages 159-167
نویسندگان
G.S. Cun, P.H. Robinson, S.E. Benes,