搜索结果: 1-8 共查到“家畜繁殖学 fertility”相关记录8条 . 查询时间(0.093 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...
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...
Cross Fertility between the Wild Japanese Quail in the Weishan Lake Area and Domestic Quail
Wild Japanese Quail Domestic Quail Fertilization Rate Hatchability
2016/4/14
Cross fertility between wild Japanese quail and domestic quail was explored in an experiment conducted on 18 (3?? 15??竊뎩ild Japanese quails in Weishan Lake area, 18 (3?? 15??竊뎜edium-size...