Arid
DOI10.1071/AN13349
Age and season effects on quality of diets selected by Criollo crossbred goats on rangeland
Gaytan, Leticia1; Salem, Abdel-Fattah Z. M.2; Rodriguez, Alvaro3; Garcia, Jose E.3; Arevalo, Jose R.4; Mellado, Miguel3
通讯作者Mellado, Miguel
来源期刊ANIMAL PRODUCTION SCIENCE
ISSN1836-0939
EISSN1836-5787
出版年2015
卷号55期号:6页码:758-765
英文摘要

The objectives of this study were to determine the effects of age of goats (4-week old, 6.2 +/- 0.7 kg vs mature, 46.9 +/- 5.6 kg) and season (rainy vs dry) on nutrient content of diets selected by Criollo crossbred female goats on an overgrazed Chihuahuan desert rangeland. Two groups of goats, 10 goat kids and 10 non-lactating pluriparous goats from a commercial goat herd were used. Diet quality and dry matter (DM) intake was assessed via repeated collections (3-h periods) of forage from the mouth of goats, which were momentarily restrained using a light short permanent rope tightened to their neck while grazing. Feed intake was assessed by 24-h fecal collection with canvas fecal-collection bags. Mature animals ate more (P < 0.01, 23 g DM/kg bodyweight +/- 7 s.d.) than goat kids (19.5 g DM/kg bodyweight +/- 6 s.d.) across grazing seasons, but DM digestibility of selected diet was greater (P < 0.01) in goat kids than in mature goats (58.5 +/- 4.0% vs 55.3 +/- 3.5%, respectively) across seasons. Ash (100 +/- 16 vs 79 +/- 13 g/kg DM), phosphorus (1.36 +/- 0.41 vs 1.13 +/- 0.36% DM) and crude protein (94.5 +/- 4 vs 88.5 +/- 5 g/kg DM) contents were greater (P < 0.01) in diets selected by goat kids compared with mature goats. Dietary protein was greater in rainy than in the dry season. Across grazing seasons, herbage selected by goat kids had a lower (P < 0.01) concentration of neutral detergent fibre and acid detergent fibre than did that selected by mature goats. There was an age by grazing season interaction (P < 0.05) for most chemical components of forages selected by goats. In conclusion, both age and season affected diet quality of goats on rangeland, as goat kids ingested a diet richer in nutrients than that of mature goats. This supports the theory that herbage selection is shaped by physiological effort and, consequently, nutrient consumption is driven by higher nutrient requirements for growth, although incomplete development of rumen function and small body mass limited feed intake in preweaning goat kids.


英文关键词body size diet quality feed intake foraging forage selection herbivore
类型Article
语种英语
国家Mexico ; Spain
收录类别SCI-E
WOS记录号WOS:000353906400009
WOS关键词NEUTRAL DETERGENT FIBER ; BODY-SIZE ; PLASMA METABOLITES ; FORAGING BEHAVIOR ; VOLUNTARY INTAKE ; FOOD SELECTION ; DIGESTIBILITY ; LAMBS ; HERBIVORES ; NUTRITION
WOS类目Agriculture, Dairy & Animal Science
WOS研究方向Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/185736
作者单位1.Autonomous Agr Univ Antonio Narro, Dept Vet Sci, Torreon 27054, Mexico;
2.Univ Autonoma Estado Mexico, Fac Med Vet & Zootecnia, Mexico City 50110, Estado De Mexic, Mexico;
3.Autonomous Agr Univ Antonio Narro, Dept Anim Nutr, Saltillo 25315, Coahuila, Mexico;
4.Univ La Laguna, Dept Parasitol Ecol & Genet, San Cristobal la Laguna 38200, Spain
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GB/T 7714
Gaytan, Leticia,Salem, Abdel-Fattah Z. M.,Rodriguez, Alvaro,et al. Age and season effects on quality of diets selected by Criollo crossbred goats on rangeland[J],2015,55(6):758-765.
APA Gaytan, Leticia,Salem, Abdel-Fattah Z. M.,Rodriguez, Alvaro,Garcia, Jose E.,Arevalo, Jose R.,&Mellado, Miguel.(2015).Age and season effects on quality of diets selected by Criollo crossbred goats on rangeland.ANIMAL PRODUCTION SCIENCE,55(6),758-765.
MLA Gaytan, Leticia,et al."Age and season effects on quality of diets selected by Criollo crossbred goats on rangeland".ANIMAL PRODUCTION SCIENCE 55.6(2015):758-765.
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