Estimation of grass intake by lambs using n-alkanes as markers
نویسندگان
چکیده
منابع مشابه
The Use of N-alkanes as Markers for Determination of Intake and Digestibility of Fish Feed
Introduction Measurements of intake and digestibility are among the most critical estimates needed to determine the nutrient requirements and feed utilization in fish. Many methods have been devised to study these parameters, but all have their shortcomings and disadvantages, as direct measurements are not applicable. One of the most common methods used to measure intake of livestock is based o...
متن کاملEvaluation of n-alkanes as digesta markers in dairy cows.
Recovery of hentriacontane (C31 alkane) in feces as influenced by amount consumed and level of dietary fat was examined in a 2 x 2 factorial study in a 4 x 4 Latin square. Treatments were 1) alfalfa hay:concentrate (70:30; AH); 2) AH + calcium soap (500 g/d); 3) grass hay:concentrate (70:30, GH); and 4) GH + calcium soap. Fat did not influence C31 recovery in feces. Fecal recovery (grams/day) d...
متن کاملPlant and soil intake by organic broilers reared in tree- or grass-covered plots as determined by means of n-alkanes and of acid-insoluble ash.
Free-range birds such as organic broilers may ingest soil and plants during exploration. The estimation of such intakes is of great interest to quantify possible nutritional supplies and also to evaluate the risk of exposure to parasites or to environmental contaminants. Marker-based techniques are now available and would allow to quantify plant and, especially, soil intake in free-range birds,...
متن کاملGrass material as a modern process standard for 14 C analysis of n - alkanes
One of the difficulties in reporting accurate radiocarbon results from compoundspecific radiocarbon analysis (CSRA) is the lack of suitable process standard materials to correct for the amount and C content of carbon added during extensive sample processing. We evaluated the use of n-alkanes extracted from modern grass material (1.224 ±0.006 fraction modern) as process standards for CSRA. The n...
متن کاملEvaluation of n-alkanes and their carbon isotope enrichments (dC) as diet composition markers
Plant cuticular n-alkanes have been successfully used as markers to estimate diet composition and intake of grazing herbivores. However, additional markers may be required under grazing conditions in botanically diverse vegetation. This study was conducted to describe the n-alkane profiles and the carbon isotope enrichment of n-alkanes of common plant species from the Mid Rift Valley rangelands...
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ژورنال
عنوان ژورنال: Annales de Zootechnie
سال: 1992
ISSN: 0003-424X
DOI: 10.1051/animres:19920144