Effects Of "Jimurui" On Reproductive Performance Of Sows And The Functional Mechanism

The experiments were conducted to research the effects of “Jimurui” feed supplementation on reproductive performance of sows and the functional mechanism. The research was designed into three experiments:Experiment 1: 40(about 7.5 months and 115kg) gilts with the same parity were randomly divided into 2 groups equally. Each group divided into 5 columns equally. The control group was fed the basal diet and the test group was added a dose of “jimurui 1” per gilts per day on the basis of diet one week. Taking the same management to the both groups in the breeding methods and follow-feeding and management. At last, tracking to measure the reproductive performance of the two groups.Experiment 2: 60 abnormal oestrus sows(in 2-3 parity) were randomly divided into “Jimurui 2” and PG600 test groups equally. Another 30 normal estrus sows were selected to be the control group. The control group was fed the basal diet. The group 1 was added a dose of “Jimurui 2” per sow per day on the basis of diet during the first week. The group 2 was injected a dose of PG600 per sow on the first day of the experiment. The reproductive performances of the three groups were tracked to measure.Experiment 3: 60 Large White sows(about 4-5 parity) were randomly divided into 2 groups equally. Two groups were fed the same basal diet. The test group was added “Jimurui 2” during the first week after weaning, and then “Jimurui 3” during the gestation, “Jimurui 4” during the lactation. The reproductive performances of the two groups were tracked to measure.The results showed as follows :Experiment 1: 1) The gilts estrus performance: The group of “jimurui 1” was higher 11.60 and 28.33 percent points than the control group in 7 d and 14 d estrus rate and lower 16.67 percent points in the estrus returning rate, as the same time, the control group conception rate was higher 21.60 points than the control group(P <0.05). 2) The subsequent reproductive performance in gilts: Compared with the control group, the group of “jimurui 1” was no significant difference in litter size, number born alive, the number of production low earners, litter weight at birth, weaning litter weight and 21-day survival rate, 28-day litter weight transfer group(P> 0.05).Experiment 2: 3) The sows oestrus performance: The group of “Jimurui 2” was lower 53.34 percent points than the PG600 group in 7 d oestrus rate(P<0.05), and lower 20.00, 8.21, 10.00 percent points in 14 d oestrus rate, the oestrus returning rate and the conception rate(P>0.05). The conception rate of both test groups were lower than that of the control group(P<0.05). 4) The subsequent reproductive performance in sows: Compared with the group of PG600, the group of “Jimurui 2” was rather better in number born alive, birth litter weight, 21-day and 28-day litter weight and survival rate, but no significant difference in every subsequent reproductive performance among the three groups(P>0.05).Experiment 3: The group of “Jimurui” was higher 9.43 and 9.31 percent points than the control group in 14 d oestrus rate and conception rate(P<0.05). The subsequent reproductive performances of the test group sows were increased in some extent. Compared with the control group, the group of “Jimurui” was higher 17.59% and 19.26% in 21-day and 28-day litter weight. The piglets of group “Jimurui” was lower 18.18% in diarrhea index(P<0.05) and higher 5.44% in skin scores(P>0.05) than that of the control group, respectively.The results also showed that the serum estradiol level of the sows in 6-12 h after “Jimurui” treatment was increased(P<0.05), but the serum progesterone level was decreased(P<0.05). The group of “Jimurui” was higher 57.47% and 16.48% than the control group in colostrum fat and protein content(P<0.05), respectively.Conclusion: Feeding “Jimurui” have great effect on gilts and sows and piglets. It can improve the sow reproduction performance and milk production performance, reduce diarrhea rate and death and culling rate, improve the piglet growth performance, better the pig healthy state.