PDF(Pubmed)
Abstract：
In a 10-wk study, alterations in the rate of fertility, egg viability, and hatch parameters of adult geese exposed to different breeding methods were investigated. Twenty-four matured geese (4.0 ± 0.45 average weight) were randomly divided into three groups (TNM-natural mating group, TIM-artificial insemination group, TNI-natural mating and insemination group) of two replicates with four geese per replicate in a completely randomized design. Fresh semen collected from six ganders (5.2 ± 0.69 average weight) was pooled and used to inseminate the geese in TIM and TN1 at 0.2Ml at insemination times. The geese in TNM and TNI were allowed to mate naturally. Insemination and mating was done at 3 d interval and eggs from each treatment were collected daily. Incubation of eggs was done weekly, candling and transfer to hatcher were done on day 27 and goslings hatched out on day 30. Fertility, early embryo mortality (EEM), mid embryo mortality (MEM), late embryo mortality (LEM), hatch of fertile eggs (HOF), and hatch of set eggs (HOS) were obtained and analyzed using descriptive statistics and ANOVA and means separated using least significant difference test. Geese in TNI had significantly higher fertility (93.33 ± 10.97%) than TNM (59.67 ± 31.29%) and TIM (83.60 ± 17.14%). The EEM was higher in TIM than in the two other groups while the HOF and HOS were higher in TNM and TNI than in TIM. This study suggests that in comparison with TIM, higher fertility, hatchability, and lower embryo mortality can be obtained when geese are inseminated and naturally mated simultaneously.
摘要：
在一项为期10周的研究中，生育率的变化，卵的生存力，研究了不同饲养方法下成年鹅的孵化参数。24只成熟鹅(平均体重4.0±0.45)随机分为三组(TNM-自然交配组,TIM-人工授精组,TNI-自然交配和授精组）在完全随机的设计中重复两次，每次重复四只鹅。将从六个甘德收集的新鲜精液（平均体重5.2±0.69）合并，并用于在授精时以0.2Ml在TIM和TN1中对鹅进行授精。TNM和TNI中的鹅被允许自然交配。每隔3d进行授精和交配，每天收集每种处理的卵。每周都会进行鸡蛋的孵化，在第27天进行烛光检查并转移到孵化场，在第30天孵化出小鹅。生育率，早期胚胎死亡率（EEM），胚胎中期死亡率（MEM），晚期胚胎死亡率（LEM），孵化可育卵（HOF），使用描述性统计和方差分析获得和孵化的卵（HOS），并使用最小显着差异检验进行均值分离。TNI鹅的繁殖力（93.33±10.97％）明显高于TNM（59.67±31.29％）和TIM（83.60±17.14％）。TIM中的EEM高于其他两组，而TNM和TNI中的HOF和HOS高于TIM。这项研究表明，与TIM相比，更高的生育率，孵化率，当鹅同时受精和自然交配时，可以获得较低的胚胎死亡率。
