نتایج جستجو برای: 130 nrc 1994
تعداد نتایج: 96261 فیلتر نتایج به سال:
This experiment was conducted to investigate the effects of intensity of restricted early feed and increased nutrient density after restriction period on performance and compensatory growth in broilers. Two hundred and eighty-eight broiler (Lohman) chicks in a completely randomized design in a 2*3 factorial arrangement of treatments were employed. Birds were fully fed from 7 to 13d or 100% of a...
The objective of this study was to evaluate the levels sulfur amino acids in diets laying hens 34-50 weeks age. 336 Dekalb White birds were distributed a completely randomized design with six treatments, 14 replicates four each. consisted control treatment, formulated meet nutritional requirements according NRC (1994) and five varying methionine plus cystine level (0.536, 0.603, 0.670, 0.737, 0...
Feed technology has advanced in the past two decades. However, NRC (1994) vitamin requirements for the non-ruminant species have not changed to any great extent due to limited research in this area. Conditioning temperatures have increased to reduce microbial contamination and improve pellet quality and/or production rate. From a practical standpoint, vitamin activity may be decreased in finish...
This experiment was conducted to investigate the effects of intensity of restricted early feed and increased nutrient density after restriction period on performance and compensatory growth in broilers. Two hundred and eighty-eight broiler (Lohman) chicks in a completely randomized design in a 2*3 factorial arrangement of treatments were employed. Birds were fully fed from 7 to 13d or 100% of a...
The effect of dietary protein level and feed restriction on performance, body temperature and hematological values was evaluated, using Ross 308 broiler chicks under heat stress. For this purpose, three dietary treatments were fed to broilers during 21 to 42 days of age. Two treatments consisted of diets with protein levels recommended by NRC, 1994 and 85% of NRC recommendation and were fed ad-...
Accident databases (NRC, RMP, and others) contain records of incidents (e.g., releases and spills) that have occurred in the USA chemical plants during recent years. For various chemical industries, [Kleindorfer, P. R., Belke, J. C., Elliott, M. R., Lee, K., Lowe, R. A., & Feldman, H. I. (2003). Accident epidemiology and the US chemical industry: Accident history and worst-case data from RMP*In...
In the 20 years since cleanup of contaminated groundwater has been a high priority in the United States, recognition of both the scope of the problem and the technical difficulties involved has grown steadily. Estimates of the number of hazardous waste sites where groundwater may be contaminated vary between 300,000 and 400,000 nationwide [NRC, 1994]. Legislation passed in the 1980s by Congress...
این تحقیق به منظور بررسی اثر جیره های متفاوت از نظر مواد مغذی بر عملکرد، صفات لاشه و منحنی رشدی در بلدرچین ژاپنی انجام شد. در این آزمایش از تعداد 1000 قطعه بلدرچین یک روزه در قالب طرح کاملا تصادفی در 4 تیمار، 3 تکرار و 86 قطعه پرنده در هر تکرار به مدت 56 روز استفاده شد. تیمارها عبارت بودند از: 1) جیره با تراکم 5% کمتر از پیشنهاد جدول احتیاجات غذایی طیور (1994) 2) جیره بر اساس پیشنهاد جدول احتیا...
این آزمایش با هدف ارزیابی اثرسطوح مختلف کلسیم، فسفر و روغن سویا در جیرۀ غذایی بر عملکرد تولیدی و شاخص‌های کیفیت تخم با استفاده از 216 قطعه مرغ تخم‌گذار سویه‌های لاین اجراء شد. آزمایش به صورت فاکتوریل (2×3) در قالب طرح کاملاً تصادفی با 6 تیمار شامل سه سطح کلسیم و فسفر (توصیه NRC، 15 و 30 درصد بیشتر از توصیة NRC) و دو سطح روغن سویا (صفر و 4 درصد) با 3 تکرار و 12 قطعه مرغ در هر تکرار به مدت 12 هفته...
amino acid (aa) content of six meat and bone meal (mbm) samples was determined by ion-exchange chromatography. true aa digestibility of amino acids were determined of using precise sibbald's feeding method. metionin and lucien, with averages of 0.35 and 2.29 percent, had the lowest and highest values among essential aa of mbm samples. average content of individual aa, sum of essential and ...
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