عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TLpq303793926
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
Trace mineral interaction on reproductive performance of beef cattle under range conditions in Edwards and McCulloch Counties, Texas
نام عام مواد
[Thesis]
نام نخستين پديدآور
J. C. Doyle, II
نام ساير پديدآوران
J. E. Huston
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
Texas A&M University
تاریخ نشرو بخش و غیره
1989
مشخصات ظاهری
نام خاص و کميت اثر
142
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
Texas A&M University
امتياز متن
1989
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
In Exp. I the effect of mineral supplementation on reproductive performance of cows grazing native range at two locations (McCulloch--supplemented prior breeding season and Edwards--supplemented throughout breeding season) was monitored by tissue (serum and liver) parameters, body condition score (BCS) and days to conception (DTC) in cows and adjusted weaning weight (AWW) in their calves. A randomized block design contained forty-five cows (4 cows usd\cdotusd treatment usd\cdotusd pasture usd\cdotusd location). Treatments consisted of the following: negative control (NC), feed control (FC), FC with additional phosphorus (P) and P + additional Zn, Cu and Mn (TM). At the McCulloch location, TM increased (P <.10) BCS and serum Cu (P <.05). At the Edwards location, average DTC were 42, 35, 29 and 22 d for NC, FC, P and TM, respectively (P usd Experiment II monitored the effects of supplemented nutrients on in situ dry matter disappearance (DMD) of three materials (sudan hay, alfalfa meal and cotton). The Latin square design consisted of restricted trials (each trial consisted of one animal per treatment with four treatments). The treatments were negative control (NC), feed control (FC), FC with additional P (FC + P) and FC + P + Cu, Mn and Zn (TM). Supplementation (FC + P + TM) depressed cotton DMD (P <.01), possibly as a result of toxicity from accumulated trace elements at the fiber surface. Experiment III investigated the influence of mineral supplementation on elemental concentration in tissues (serum, liver and endometrium) and reproductive efficiency. A randomized block design contained thirty-two, 22 to 24 mo old, heifers. These heifers were assigned to one of four treatment groups (NC, FC, FC + P and FC + P + TM). Neither estrous (d-1 vs d-12) nor treatment influenced serum or liver Cu and Zn concentrations. Endometrial tissue concentrations of Cu, Zn, Ca, Na, K, P and Mg were elevated (P <.05) for collection period (d-1 vs d-12). Progesterone's negative influence on endometrial elemental concentration indicated involvement of a hormonal interaction within the endometrium. The endometrium proved to be the most sensitive tissue to FC + P + TM.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Biological sciences
موضوع مستند نشده
Cattle
موضوع مستند نشده
Edwards County
موضوع مستند نشده
Livestock
موضوع مستند نشده
McCulloch County
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
J. C. Doyle, II
مستند نام اشخاص تاييد نشده
J. E. Huston
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
