【摘要】 为研究母猪输精时间对受胎率的影响、配种后转群时间对分娩率和产仔数的影响以及哺乳期长短对非生产天数的影响,本研究分别进行了3次试验。试验一选取160头发情母猪,随机分为4组,分别在发情后12、24、36 h和48 h输精;试验二选取60头配种后的母猪,随机分为2组,分别在配种后7 d和35 d转至妊娠舍;试验三选取56头母猪,随机分为3组,分别在14、21 d和28 d时断奶。结果显示:发情后24 h输精的母猪受胎率最高;母猪在配种后35 d转至妊娠舍分娩率和总产仔数最高;哺乳期为21 d母猪非生产天数最低。更多还原

【Abstract】 To study the connection between semen injection time and conception rate; turn group time after mating and farrowing rate or total number born, lactation length and non-productive days, this study conducted 3 tests labeled1,2,3 respectively. Test 1 selected 160 oestrous sows, randomly divided into 4 groups, and give different time of semen injection time(12h,24 h,36h,48h). Test 2 selected 60 sows after breeding, randomly divided into 2 groups, and moving the pregnant sows during gestation period at 14 d and 35 d respectively. Test 3 selected 56 sows, randomly divided into3 groups, and weaning at 14 d, 21 d and 28 d respectively. The results shows that, 24 h insemination time, group turning time at 35 d and weaning at 21 d have the best reproductive and production performance.更多还原