摘要
试验以63头长白-大白杂交初产母猪为试验动物,研究不同营养水平对母猪妊娠早期繁殖性能的影响。将配种后母猪随机分到3个营养水平组(高、中、低)中,各营养水平通过每天供给2、1.2和0.6倍维持需要的饲粮,分别在妊娠12、25和35d将母猪称重、屠宰。结果表明:各水平组母猪妊娠12、25和35d的母体总增重和净增重有极显著(P<0.01)差异。中水平妊娠25d的子宫及内容物重量和两侧子宫角长度均显著(P<0.05)高于高水平和低水平;中水平妊娠35d的子宫及内容物重量和右侧子宫角长度显著(P<0.05)高于高水平。中水平妊娠12 d的总活胚数显著(P<0.05)高于高水平。中水平妊娠12、25和35d的胚胎存活率显(著P<0.05)高于高水平;中水平妊娠25d和35d的胚胎存活率显著(P<0.05)高于低水平。中水平妊娠35 d的活胚重显著(P<0.05)高于高水平,极显著(P<0.01)高于低水平。以上试验表明,在妊娠35d内给母猪饲喂1.2倍维持需要能使子宫发育更良好,并具有较高的胚胎存活率,而高水平饲喂和严重限饲均会导致母猪妊娠早期的胚胎存活率降低。
Sixty three crossbred gilts （Landrace ×Yorkshire） were used to investigate the effect of feed allowance levels on reproductive performance during early pregnancy in gilts. The gilts were randomly allotted to three feed allowance levels （High：2×maintenance; Medium： 1.2×maintenance; Low：0.65×maintenance） after breeding. Gilts were weighed and slaughtered at d 12, 25 and 35 during pregnancy. There were very significant diffenrence in overall weight gain and net weight gain on d 12, 25, 35 of pregnancy among three groups （P 〈 0.01）. The weight of uterus and its content and the length of two side uterine horns on d 25 of pregnancy were significantly greater in M than in H and L gilts （P 〈 0.05）. The weight of uterus and its content and the length of right side uterine horn on d 35 of pregnancy were significantly greater in M than those in H gilts （P 〈 0.05）. Number of live embryos on d 12 of pregnancy were significantly greater in M than those in H gilts （P 〈 0.05）. Embryonic survival on d 12, 25, 35 of pregnancy were significantly greater in M than those in H gilts（P 〈 0.05）, those on d 25, 35 of pregnancy were significantly greater in M than those in L gilts （P 〈 0.05）. Embryonic weight on d 35 of pregnancy were significantly greater in M than those in H gilts（P 〈 0.05）, and than those in L gilts（P 〈 0.01）. It is concluded that gilts were feeded with allowance of 1.2 times requirement of maintenance in d 0-35 of pregnancy, which could make uterus development better and have greater embryonic survival, but high feed allowance and serious restricted feeding all depress embryonic survival in early pregnancy.
出处
《中国畜牧杂志》
CAS
北大核心
2007年第17期30-33,共4页
Chinese Journal of Animal Science
基金
国家自然科学基金(30471257)
关键词
营养水平
妊娠早期
胚胎存活
初产母猪
feed allowance levels
early pregnancy
embryonic survival
gilt
作者简介
通讯作者
