搜索结果: 1-15 共查到“畜牧学 fertility”相关记录16条 . 查询时间(0.183 秒)
Placental characteristics of German Landrace sows and their relationships to different fertility parameters
pig placenta fecundity placental efficiency litter number litter size
2018/11/23
The placenta is the central foetal organ that ensures a sufficient exchange of nutrients and metabolites for adequate foetal growth. Specific data profiles for placental characteristics from modern pi...
Preservation effects of melatonin on the quality and fertility of native Fars rooster semen during liquid storage
chicken sperm antioxidant lipid peroxidation
2016/1/29
Liquid or frozen storage of poultry semen negatively affects the sperm motility and has crucial role in reducing fertility. Phospholipids in chicken sperm membrane are composed of high proportions of ...
Fertility enhancing effects of methanolic leaf extract of Dracaena arborea in albino rats (Rattus norvegicus)
spermatogenesis sperm number testicular weight morphology
2015/6/24
The effects of methanolic extract of Dracaena arborea on mean testicular weight, mean cauda epididymal sperm reserve, and testicular morphology were evaluated. A total of sixty mature male Sprague Daw...
Effect of age at first calving on longevity and fertility traits for Holstein cattle
functional traits survival analysis linear model cattle
2015/6/24
Effects of age at first calving (AFC) on functional longevity of Czech Holstein cows and their reproduction traits in the first lactation were analyzed using the first lactation data of 605 538 Holste...
Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows
dairy cattle reproduction production
2015/6/23
The aim of this study was to estimate genetic parameters for female fertility and production
traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the ac...
Relationships between the results of hypo-osmotic swelling tests, sperm motility, and fertility in Estonian Holstein dairy bulls
bull fertility semen quality sperm membrane intactness
2015/6/23
However, the HOS-2 and HOS-3 values in FT semen
had high correlations with NRR (r = 0.65, r = 0.66, P < 0.001 at batch level and r = 0.63, r = 0.71, P < 0.01
at bull level), which was comparable t...
Relationships between milk urea and production and fertility traits in Holstein dairy herds in the Czech Republic
dairy cow reproduction probability of conception
2015/6/8
The objective of this study was to determine how the concentration of milk urea (MU) and FPCM production affect reproduction in selected Holstein dairy herds in the Czech Republic. A retrospective, ob...
The effect of season and parity order on fertility of rabbit does and kit growth
rabbit doe season parity order fertility rabbit growth
2015/6/8
The effect of season and parity order on doe fertility and rabbit growth was evaluated. Two hundred and fifty Hyplus® does were divided into five groups according to kindling, each in a given sea...
Grazing intensity affected spatial patterns of vegetation and soil fertility in a desert steppe
Grassland Dryland Sheep grazing Spatial homogeneity Nitrogen Geostatistics
2015/2/4
Spatial heterogeneities of vegetation and soil can strongly affect ecological functions of ecosystems, particularly for arid and semi-arid ecosystems where vegetation has a patchy distribution and liv...
Effect of Dietary L-ascorbic Acid (L-AA) on Production Performance, Egg Quality Traits and Fertility in Japanese Quail (Coturnix japonica) at Low Ambient Temperature
Cold Stress Egg Quality Fertility Japanese Quail)
2016/5/10
Environmental stress boosts the levels of stress hormones and accelerates energy expenditure which subsequently imbalance the body’s homeostasis. L-ascorbic acid (L-AA) has been recognized to mitigate...
Effects of Progestagen and Pmsg on Estrous Synchronization and Fertility in Kivircik Ewes during Natural Breeding Season
Kivircik Ewe Synchronization PMSG Progestagen Fertility
2016/5/4
An experiment was conducted using indigenous Kivircik ewes to evaluate the effect of intravaginal progestagen sponges, containing 30 mg of fluorogestone acetate (FGA), followed by administration of pr...
Influence of Energy Restriction and Pre-incubation Holding Period of Eggs on Fertility and Hatchability in Aged Broiler Breeders
Energy Restriction Pre-Incubation Holding Fertility Hatchability Aged Broiler Breeders
2016/5/4
The effects of controlled energy restriction and duration of pre-incubation egg holding on fertility, hatchability and hatch losses were evaluated in aged broiler breeders (64 wk). The energy (ME) req...
The Effect of Semen Dilution on Morphology and Fertility of Japanese Quail (Coturnix coturnix japonica) Spermatozoa
extenders fertility quails spermatozoa morphology
2009/7/30
The effect of quail semen dilution with three extenders : Lake's, Ringer's and Tyrod's on morphology and fertility trials of unstored spermatozoa was evaluated. Semen was collected twice a week by mal...
EFFECT OF THE SEX RATIO ON THE EGG FERTILITY OF MUSCOVY DUCK (CAIRINA MOSHCATA)
Muscovy duck sex ratio hierarchial relations
2010/11/30
Study was carried out for establishing the optimal sex ratio in Muscovy duck breeding. Four variants of the ratio of the male to the female individuals were tested: 1:5(I), 1:6(II), 1:7(III) and 1:8(I...
Quality and Fertility of Post Thaw Sephadex Filtered Bull Semen
Bull Semen Sephadex Filtration Fertility
2016/4/15
The present investigation was carried out to assess the effect of Sephadex (G-15) filtration on the post thaw bull semen quality and conception rate. Post thaw unfiltered (control) and Sephadex filter...