搜索结果: 1-15 共查到“农学 milk yield”相关记录39条 . 查询时间(0.156 秒)
Effects of erythromycin on milk yield, rumen contraction rate and blood beta-hydroxybutyrate concentration in dairy cows after laparoscopic reposition of the left displaced abomasum
cattle dislocatio abomasi endoscopy prokinetic drugs gastrointestinal mobility
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2016/9/1
The objective of this study was to evaluate the beneficial effects of erythromycin (Emy), a prokinetic drug active at the level of the abomasum, duodenum and proximal duodenum, in dairy cows undergoin...
Nucleotide sequencing and DNA polymorphism studies of beta-lactoglobulin gene in native Saudi goat breeds in relation to milk yield
Saudi goats functional polymorphism
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2015/7/7
β-Lactoglobulin (β-LG) is the dominant non-casein whey protein found in milk of bovine and of
most ruminants. The amino acid sequence of β-LG along with its 3-dimensional structure illustrates linka...
Association of insulin-like growth factor I gene polymorphisms (IGF1/TasI and IGF1/SnaBI) with the growth and subsequent milk yield of Polish Holstein-Friesian heifers
cattle body weight insulin-like growth factors milk performance
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2015/6/24
The aim of this study was to estimate potential relationships between insulin-like growth factor I gene polymorphisms (IGF1/TasI and IGF1/SnaBI) and the growth parameters of calves as well as their su...
Lactation curves for milk yield, fat, and protein content in Slovenian dairy sheep
dairy sheep milk traits test-day records
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2015/6/23
Lactation curves for daily milk yield, fat, and protein content in three dairy sheep breeds were
estimated by the repeatability animal model using test-day records. A total of 38 983 records from 30...
Relationship between milk yield, stage of lactation, and some blood serum metabolic parameters of dairy cows
cow milk aminotransferase cholesterol
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2015/6/23
The aim of the study was to evaluate the effect of milk yield and stage of lactation on the
activity of liver enzymes, cholesterol, and vitamin C concentration in blood of milking cows.
Relationships among milk yield, body weight, and reproduction in Holstein and Czech Fleckvieh cows
dairy cow negative energy balance
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2015/6/23
A retrospective, observational study comprised analyses of individual cow records from
a computerised herd management system. Production, body weight, and reproduction data were collected
between ...
Effect of weaning calves from mother at different ages on their growth and milk yield of mothers
calf cow restricted suckling weaning growth milk production
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2015/6/9
The aim of this study was to determine the impact of the length of calf sucking milk from its own mother on calf growth at the age of 3 months and milk yield of mothers. We tested a hypothesis that th...
Effect of duodenal infusions of leucine on milk yield and plasma amino acids in dairy cows
leucine duodenal infusion milk plasma amino acids dairy cow
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2015/6/8
Four high-yielding lactating Holstein cows fitted with duodenal cannulas were used in the experiment. Cows were divided into 2 groups – control (Control) with leucine deficiency and experimental (Leuc...
Relationships among body condition score, milk yield and sires’ breeding value for beef production efficiency in Czech Fleckvieh cattle
body condition score (BCS) relative breeding value (RBV) net daily gain (NG) milk yield Czech Fleckvieh
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2015/6/5
The objective of this study was to analyze the relationships among cows’ body condition score before calving, subsequent BCS changes, milk yield, lactation characteristics and their sires’ relative br...
Relationships among body condition score, milk yield and reproduction in Czech Fleckvieh cows
Czech Fleckvieh body condition score milk yield reproduction indicators BCS development
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2015/6/5
The objective of this study was to confirm the relationship among body condition score at the time around parturition, milk yield in subsequent lactation, reproductive efficiency and BCS development i...
Effect of herd, parity, stage of lactation and milk yield on urea concentration in milk
dairy cow milk urea non-nutritional factors
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2015/6/2
The objective of this study was to determine how non-nutritional factors such as herd, parity, days in milk, milk production, and milk components affect the concentration of milk urea. A retrospective...
Factors affecting milk yield and ewe’s lactation curves estimated with test-day models
Tsigai Improved Valachian Lacaune milk yield environmental effects lactation curve
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2015/6/2
Test-day records of purebred Tsigai, Improved Valachian and Lacaune ewes were analysed with a general linear model in order to investigate the effects of flock-test day, lactation number, days in milk...
Effects of fat-protein supplementation of diets for cows in early lactation on milk yield and composition
dairy cows CaFA salts milk composition yield
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2015/6/2
An experiment was performed on 37 Holstein-Friesian cows during the first 120 days of lactation. The cows were fed balanced diets composed of haylage and maize silage (together 52% dry mater) and a co...
Effects of different forage-containing rations on metabolic parameters and milk yield in the peripartum of Holstein cows
hay silage forage
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2015/6/1
To evaluate the forage effects on performance and metabolic parameters, 24 Holsteins were randomly fed one of the diets containing a forage mixture with majority of alfalfa hay (AH), alfalfa silage (A...
Factors affecting goat milk yield and its composition
Czech White Shorthaired goat fat protein
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2015/6/1
The aim of the paper was to prove the accuracy of various statistical models of vari璦nce analysis for estimation of systematic factors that influence milk yield and fat and protein content in dairy go...